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Ординатура / Хирургия / Библиотека им академика М.И. Перельмана / Книга_5238_Библиотеки_им_академика_М_И_Перельмана.pdf
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increased blood pressure (Ribeiro and Sebastião 2010). In addition, caffeine stimu­lates the release of catecholamines (e.g., noradrenaline, adrenaline) from the adre­nal glands, leading to increased heart rate and cardiac output and peripheral vasoconstriction. Other issues associated with caffeine intake may include the stim­ulation of renin release from the kidneys through the release of angiotensin II, a potent vasoconstrictor which stimulates the release of aldosterone, leading to sodium and water retention, further contributing to increased blood pressure (Tanuma et al. 2003). Another caffeine effect involves the impairment of insulin sensitivity and glucose metabolism, both representing risk factors for hypertension and cardiovascular disease (Sakr etal. 2023). A recent meta-analysis and systematic review by Chen etal. (2022) observed that caffeine exposure during pregnancy was not signicantly associated with the risk of gestational hypertension or pre­eclampsia, suggesting that more prospective and long-term studies should be imple­mented to draw up denitive conclusions. Santana etal. (2024) concluded in their systematic review that the evidence so far published is insufcient to conrm with certainty that prenatal caffeine exposure may lead to neurobehavioural disorders in the newborns. In conclusion, evidence supports the recommendation of a caffeine consumption up to 300mg daily in healthy pregnant women as an intake that is generally not associated with adverse reproductive and developmental effects (Chen etal. 2022; Wikoff etal. 2017).
Furthermore, tea and other consumed beverages which could contain bioactive compounds including caffeine, catechins and polyphenols have been investigated in their potential detrimental impact on gestational, foetal and neonatal outcomes (Arafa etal. 2024). The highest frequencies of antenatal tea drinking were associ­ated with increased ORs of hypertensive disorders of pregnancy (OR=1.16) (Arafa etal. 2024). Therefore, it could be prudent for pregnant women to minimize tea consumption as well. However, well-designed prospective cohort studies are needed to establish causality and explore potential dose-response relationships between tea consumption during pregnancy and gestational and/or foetal and/or neonatal outcomes.
L. Orsolini et al.
22.3 Cannabis andCannabimimetics Use During
thePerinatal Period
Cannabis sativa L. (aka Canapa, Indian Canapa, Marijuana, Mary Jane, Hashish, pot, herb, Maria, Hagga, Puf, Maconha, etc.) is a commonly used drug during preg-
nancy, with its use having increased among pregnant women in recent years (Young­Wolff etal. 2017, 2019). Epidemiological evidence shows that cannabis use during the gestational period is quite common, ranging from 3% to 16% worldwide reach­ing higher levels in some demographic subgroups (Angeliki Gerede etal. 2024). Marijuana has antiemetic properties, and prenatal cannabis use is most prevalent in the rst trimester of pregnancy for managing nausea and vomiting in pregnancy and hyperemesis syndrome (Ainiti et al. 2023). In addition, marijuana use can be reported among pregnant women to self-manage other pregnancy-related
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symptoms, including anxiety, depression, pain or for recreational purposes (Young­Wolff et al. 2019; Brown etal. 2019). Cannabis passes placental transfer to the foetus (Pertwee 2010) and its levels can be detected in the cord (Hanuš 2007) with levels which are proportionately smaller than those of the mother (Hanuš 2007). In urine samples of neonates, signicant levels of cannabis have been detected (Al-Hayani etal. 2001). The potentially adverse effects of marijuana use during pregnancy are aggravated by the consumption of high potency marijuana (i.e., mari­juana consisting of high Δ9-THC content of 9% or higher), with the risk of an increased effect in developing central nervous system anomalies of embryo/foetus (Psychoyos and Vinod 2013).
In utero exposure to cannabis has also been associated with increased neonatal care requirements and risk for miscarriage (Gurm etal. 2021). Furthermore, cogni­tive, motor and social dysfunctions as well as neurobehavioural complications have been described in the offspring following maternal exposure to cannabis during pregnancy (Orsolini etal. 2017). Indeed, prenatal cannabis exposure has been linked to a wide range of effects in offspring, including:
1. Cognitive impairments: Studies showed that cannabis exposure during preg-
nancy negatively impacts foetal neurodevelopment reducing performance in cognitive domains such as verbal language, memory and visual function (Gurm etal. 2021; Ramon Portillo etal. 2024). Cannabidiol (CBD) can disrupt trypto­phan metabolism in the human placenta, altering the balance of serotonin and kynurenine (KYN) pathways thus possibly increasing the risk of cognitive impairments in newborns and small-for-gestational-age births (Ramon Portillo etal. 2024). Prenatal cannabis exposure has been linked to changes in the devel­opment of fronto-limbic white matter, particularly the fornix, a critical pathway for emotional learning and memory (Evanski etal. 2023). These decits may be persistent thus extending into childhood, adolescence, and even adulthood (Murnan etal. 2021).
2. Neuro-behavioural effects: Prenatal cannabis exposure is associated with
increased impulsivity, hyperactivity, and emotional dysregulation in children (Odom etal. 2020). THC, CBD, and their combination can produce sex-specic behavioural changes during adolescence, such as altered impulsivity, anxiety, memory, and sensory gating (DeVuono etal. 2024).
3. Psychiatric illnesses: Children exposed to cannabis during intrauterine life show
a higher likelihood of developing ADHD symptoms/disorders, psychotic-like experiences and autism spectrum disorder (Tadesse etal. 2024; Paul etal. 2021).
4. Physical abnormalities: Perinatal cannabis exposure is associated with gastros-
chisis, particularly in mothers aged over 34, although further research is required to determine causality and age-related variations (Delker etal. 2024).
Studies observed that the above-mentioned risks are dose- and time-dependent, with increased levels of prenatal cannabis exposure associated with higher risks to induce detrimental obstetrical, foetal and neonatal effects (Klebanoff etal. 2021). According to a recent systematic review and meta-analysis, among all associations
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documented so far in the published literature between cannabis exposure and a spe­cic set of gestational, foetal and neonatal outcomes, only two outcomes presented convincing evidence of in utero cannabinoids exposure harmful effects, i.e., low birth weight (OR=1.43) and small for gestational age (OR=1.61) with Class I evidence (Solmi etal. 2008). Conversely, preterm delivery (OR=1.32) and neonatal intensive care unit admission (OR=1.41) displayed Class III evidence following in utero cannabis exposure (Solmi etal. 2008). Current literature conducted on humans still lacks solid association data which limits them to draw denitive conclusions, due to potential concomitant confounding variables such as polysubstance use and lifestyle issues. However, due to signicant concerns regarding impaired neurode­velopment, as well as maternal and foetal exposure to the adverse effects of mari­juana consumption, pregnant women or those contemplating pregnancy should be encouraged to discontinue cannabis and cannabis-like products. Before pregnancy and in early pregnancy, clinicians should always be asked to all women about their current and/or recent/past use of marijuana, investigating motivations and counsel women about concerns regarding potential adverse health effects during the perina­tal period. There is insufcient data to evaluate the effects of marijuana use on infants during breastfeeding, hence, marijuana consumption also during breastfeed­ing should be discouraged (ACOG 2017; National Council of State Boards of Nursing 2018). Furthermore, clinicians should be discouraged from prescribing or recommending the use of marijuana for medical purposes during the period before pregnancy and during pregnancy and lactation. Further high-quality studies regard­ing the effects of marijuana and other cannabis-containing products on pregnancy and breastfeeding are needed, including indications about the exposure and pre­scription to medical cannabis during pregnancy and postpartum period.
The use of cannabidiol (CBD) is becoming increasingly popular and is being marketed for various mental conditions. Non-approved Food and Drug Administration (FDA) commercial CBD products are available over-the-counter but may signicantly differ in composition from those used in clinical studies for medi­cal use. CBD is one of many chemical compounds, together with Δ9-THC, found in the cannabis plant. The FDA has approved one cannabis-derived (CBD) drug prod­uct (Epidiolex) for the treatment of two forms of severe epilepsy and three THC­related drug products for the treatment of nausea and vomiting caused by cancer chemotherapy or weight loss/poor appetite in patients affected with AIDS.These medications are only available with a prescription from a licensed healthcare pro­vider. There is no data on CBD exposure during pregnancy and breastfeeding; hence, CBD use should be avoided in these populations. FDA did not approve the use of CBD products for managing nausea and vomiting or ‘gravidarum hypereme­sis’, hence, CBD should not be prescribed or recommended to pregnant women (ACOG 2017; FDA 2019).
The current urging increase in the dissemination and consumption of pseudo­cannabis-like products, such as synthetic cannabimimetics, ‘Spice’ drugs, Synthetic Cannabinoids (SCBs) pose a further public and clinical concern (for a comprehen­sive review, see Orsolini etal. 2017). Blends falling under the brand ‘Spice’ are composed of herbals mixed/sprayed with cannabimimetics, with some of them
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possessing extremely high potency levels compared to traditional cannabis. The use of SCBs has become more popular due to their increased availability and the fact that they are undetectable in routine drug screenings. However, SCBs are more toxic and harmful compared to natural Δ9-tetrahydrocannabinol (Δ9-THC) due to differ­ences in activity, chemical structure, and concentration in commercial products (Schifano etal. 2015). Research conducted by a Texas-based international team revealed a signicant decrease in foetal brain vessel diameter and area density, indi­cating that acute prenatal SCB exposure causes signicant brain vasoconstriction during critical brain development stages (Raghunathan et al. 2019). However, adverse effects due to perinatal SCB exposure are still unknown, as analytical data are scarce (Carlier etal. 2020). Hence, due to limited data, clinicians should recom­mend caution and suggest to avoid SCB consumption during pregnancy and post­partum period to all women in their reproductive age.
22.4 Stimulant Use During thePerinatal Period
Stimulant drugs, including cocaine, ecstasy, methamphetamines and prescription stimulants, represent the second most widely used and abused class of substances, with a lifetime prevalence among adults of around 30% (EMCDDA 2024). Psychostimulants (‘uppers’) refer to any drug able to increase activity of the central nervous system or those with sympathomimetic properties. Psychostimulants are prescribed also for medical purposes, including mood disorders, impulse control disorders such as Attention Decit and Hyperactivity Disorder (ADHD), sleep dis­orders and obesity (Schifano etal. 2015). Stimulants are usually misused and/or abused due to their recreational euphoric and disinhibiting effect as well as for their performance-enhancing purposes (Schifano etal. 2016). Women appeared to be disproportionately vulnerable to developing stimulant misuse and abuse due to fac­tors related to hormonal proles and reinforcement of gender constructs, as well as in progressing to an addiction faster than men (Roth etal. 2004; Miller etal. 2015). Epidemiological data reported a stimulant use among pregnant women in a consis­tent increasing trend over the last decade (Smid etal. 2019).
In the late 1980s and early 1990s, cocaine dependence was labelled an epidemic by the US government, with 30% of young adult women reporting recent use (SAMHSA 2007). Cocaine use during pregnancy received considerable media attention, when photographers documented the rst newborns exposed to crack/ cocaine in utero (the ‘crack babies’ phenomenon; Chavkin 2001). Cocaine use is associated in around 10% with women in their reproductive age, who also use opi­oids for non-medical purposes (Jarlenski etal. 2017). In 2015, cocaine represented the second most common illicit substance used by pregnant women, with 3.4% of pregnant women having used cocaine in the past month (Smid et al. 2019). Sociodemographic associated risk factors are older age, African-American ethnicity and low socioeconomic status (Day etal. 1993). Moreover, cocaine represents the leading cause of ante-partum hospitalizations for substance use among pregnant women (Cox etal. 2008). Cocaine acts on the central nervous system primarily by
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the inhibition of dopaminergic reuptake, and through the activation of noradrenergic and serotoninergic sites in the basal forebrain and cerebral cortex (Malanga and Kosofsky 1999). In preclinical studies, exposure to cocaine during gestation has been shown to affect brain function, particularly the dopaminergic systems, causing anatomical, physiological, and behavioural changes. However, human studies often reported only mild alterations in attention, language, and memory inuenced by environmental factors such as socioeconomic status and other drug use (Betancourt etal. 2011). Neurotoxic effects of in utero cocaine exposure can manifest in foetal and long-term growth outcomes, as well as structural abnormalities, determining an impaired neurodevelopment. Maternal complications following in utero cocaine exposure include cardiovascular complications (e.g., hypertension, myocardial infarction, ischaemia), renal failure, hepatic rupture, cerebral haemorrhage/isch­aemia/infarction and maternal death (Smid etal. 2019). Evidence supports that car­diovascular complications are not dose-dependent, by underlining that also small doses may lead to cardiac morbidity and mortality in healthy pregnant women. Moreover, clinicians should also consider that pregnancy may increase cardiovascu­lar toxicity due to an increased cardiac muscle’s sensitivity to cocaine through an increased progesterone concentration (Plessinger and Woods Jr. 1991). Cocaine toxicity may cause severe hypertension, hyperreexia, oedema, seizures and pro­teinuria in pregnant women (Smid etal. 2019). A systematic review and meta­analysis conducted by Gouin etal. (2011) on 31 studies reported an increased risk for preterm delivery, low birth weight, small for gestational age infants, earlier ges­tational age at delivery and reduced birth weight. Postpartum psychological distress experienced by mothers with prenatal cocaine exposure was greater compared to mothers not using cocaine (Smid etal. 2019). The long-term effects on child growth and development are uncertain, though some research indicates slower growth in children up to age 10. Cocaine exposure is linked to neurodevelopmental issues like cognitive impairments, behavioural problems (e.g., ADHD), and language delays. However, sociodemographic and environmental factors may contribute as much, or more, to these outcomes. Protective factors, such as family support and better socio­economic status, can help mitigate the negative effects of prenatal cocaine exposure (Cressman etal. 2014). Higher rates of psychopathological symptoms (e.g., depres­sion, anxiety, psychosis and paranoia) amongst cocaine-using women were reported by Singer etal. (2000) which were associated with higher levels of reduced head circumference and birthweight. A dose-response correlation between a prenatal cocaine exposure and a lower height and weight-for-height z scores at 6years was reported by Minnes etal. (2005). Several large longitudinal prospective cohort stud­ies reported stable negative effects on language skills in cocaine-exposed infants and children up to 7years of age, beyond the effect of the home environment or other confounding factors (Singer etal. 2001; Morrow etal. 2003; Bandstra etal.
2004). Other studies on language development showed mixed ndings. In fact,
whilst gestational cocaine exposure may not cause the severe decits once feared, it may still result in subtle cognitive impairments that could affect academic and work performance later in life. Since brain maturation continues into adulthood, the full impact may only become evident in adolescence or adulthood, making further
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research necessary to understand its long-term effects (Betancourt etal. 2011). The extent of these negative consequences depends on the dosage, timing, and duration of a mother’s cocaine use, and therefore on how long the baby was exposed to the drug (American Addiction Centre 2024).
Methamphetamine ([2S]-N-methyl-1-phenyl-propan-2-amine; aka ‘meth’, ‘ice’, ‘crystal meth’, ‘crank’) is the methylated derivative of dextroamphetamine, its use had signicantly increased over the past two decades. Between 2010 and 2014, the rate of methamphetamine-related overdoses doubled. In 2015, 1.7 million people (0.6% of the population) used methamphetamine in the past year, with over half (52.7%) having used it in the past month (Smid etal. 2019). Ecstasy (MDMA, i.e., 3,4-methylenedioxy-N-methylamphetamine; aka ‘molly’) is an amphetamine-type substance commonly consumed by younger populations, including women of reproductive age (Center for Behavioral Health Statistics and Quality. Results from the 2015 National Survey on Drug Use and Health: Detailed Tables. Substance Abuse and Mental Health Services Administration 2016). Although MDMA and methamphetamines are the most commonly abused drugs in party/rave settings, it has been supposed that such parties would be less likely joined by women once pregnant. Conversely, one would argue that it would be more likely to be exposed to unwanted pregnancy in those women with risky behaviour due to MDMA-related disinhibiting and pro-social effect. The DAISY (Drugs and Infancy) study docu­mented a trend in both MDMA and methamphetamine use particularly in the rst trimester of pregnancy among those women who declared a pre-conception use (respectively, in 35% and 9% of cases); conversely, the persistence of this consump­tion declined throughout the pregnancy, with only 4% who conrmed its use also in the second and third trimester (Moore etal. 2009). The DAISY study observed as well that those pregnant women who declared a stimulant intake during the rst trimester usually also took concomitantly cannabis, tobacco and alcohol, with one third of them having persisted in cannabis intake throughout the pregnancy period (Moore etal. 2009).
Methamphetamine is a central nervous system stimulant which acts by increas­ing presynaptic release of dopamine, serotonin and norepinephrine. Methamphetamine use determines intense euphoria and increased levels of energy. It can be snorted, smoked, used rectally and injected. It can be manufactured from commonly available items such as over-the-counter cough syrups and deconges­tants. Methamphetamine intake has been associated with an increased risk of devel­oping myocardial infarction, hypertension, cardiomyopathy and stroke, as well as increased risk of infection including HIV and HCV and severe dental disease (Miller etal. 2009). Pregnant women using methamphetamine are typically younger (under
24), unemployed, and more likely to have psychiatric disorders, live in poverty, and have a lower perceived quality of life. They also face higher risks of legal issues and are more likely to have family and friends who use substances (Smid etal. 2019). Methamphetamine exposure during the pregnancy has been associated with adverse perinatal outcomes including stillbirth, small for gestational age, preterm delivery, caesarean delivery, and maternal intensive care unit admission, despite most studies not having controlled the effect of potential confounding factors (e.g., maternal
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co-morbidities, tobacco smoking, other drugs, contaminants in non-pharmaceutical preparations and poverty; Smid et al. 2019). A comprehensive meta-analysis, including eight studies, found that methamphetamine use during pregnancy was associated with earlier gestational age at delivery, low birthweight and small head circumference (Kalaitzopoulos etal. 2018). Congenital malformations reported fol­lowing in utero methamphetamine use included cardiac malformations, gastroschi­sis, limb reduction, biliary atresia and neural tube defects, despite prospective studies having failed to conrm a causal association, except for cleft palate (Smid etal. 2019). Newborns exposed to methamphetamine during pregnancy reported jitteriness, drowsiness and respiratory distress at a level in need of monitoring within intensive neonatal care units (Oro and Dixon 1987; Smith etal. 2003). An analysis of neurobehavior at birth revealed that methamphetamine-exposed infants demonstrated poor movement quality and high levels of physiological stress (Smith etal. 2003; LaGasse etal. 2012). Moreover, infants with a history of heavy meth­amphetamine exposure showed lower arousal and reduced excitability levels com­pared to non-exposed infants (Wouldes et al. 2023). Furthermore, although methamphetamine is neurotoxic, studies investigating the effect of methamphet­amine exposure during pregnancy on the foetal brain are mostly pre-clinical and overall suggesting a gestational age-dependent effect with exposure in early to mid­trimester; there are concerns relating to the long-lasting effects on the serotonergic development of the foetal brain (Won etal. 2001, 2002). Prenatal methamphetamine exposure negatively affects brain development, particularly during early to mid­trimester, leading to long-lasting neurotoxic effects. Studies show smaller brain vol­umes and altered metabolism in methamphetamine-exposed children, but results are inuenced by concurrent alcohol and tobacco use (Jablonski etal. 2016; Chang etal. 2004). Similarly, long-term studies of children exposed to methamphetamine are limited. The Infant Development, Environment and Lifestyle study (IDEAL) followed 412 maternal-child pairs (204 methamphetamine exposed vs 208 unex­posed pairs) from the U.S.A. and New Zealand, from delivery throughout child­hood; they reported increased likelihood of admission to the neonatal intensive care unit, decreased arousal and increased physiological stress among exposed neonates at 1month (Kiblawi etal. 2014). Heavy (e.g., more than 3days a week) prenatal methamphetamine exposure was associated with anxiety, depression and attention problems by age 3- and 5-years-old after controlling for other substances and care­giver/environmental risk factors (Derauf et al. 2012; LaGasse et al. 2012). Conversely, children exposed to methamphetamine at age 7 displayed poorer cogni­tive functioning compared to unexposed (Diaz etal. 2014).
MDMA is a powerful monoaminergic agonist which inhibits the reuptake and promotes the release of serotonin and, to a lesser extent, of dopamine. A chronic maternal MDMA intake may impair memory functioning, frontal executive pro­cessing, problem solving, decision making and social and emotional intelligence; these issues may be the result of altered parental style, newborn/child-focused atten­tion, communication and attachment style, and cognitive impairment (Rodgers
2000; Rodgers etal. 2003; Fisk etal. 2005; Rendell etal. 2007). Pregnant women
who use MDMA during pregnancy are more likely to suffer negative consequences,
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including work- and social-related impairment (Singer etal. 2012). There is limited data on foetuses and infants of women exposed to MDMA during pregnancy. Most data come from animal studies which documented an increased mortality, retinal eye defects, cleft palate, rib malformations, decreased physical growth and delayed motor development. There are only isolated reports of cardiac defects, cleft lip and biliary atresia after amphetamine in utero exposure in human infants, a reduced growth and increased foetal distress (Eriksson etal. 1978, 1981; Billing etal. 1980; Dixon and Bejar 1989; Catanzarite and Stein 1995; Plessinger 1998). Using MDMA during pregnancy can harm both the mother and the baby. In a single-centre study, pregnant women using methamphetamine were more likely to experience pre-term delivery, caesarean section and maternal ICU admission. However, the study did not consider other factors such as smoking, other drug use, or socioeconomic status (Good etal. 2010). Pregnant women who use MDMA are more likely to display higher rates of unplanned pregnancies, therapeutic abortions, binge drinking, smok­ing and using other drugs. The drug can also negatively affect the mother’s health, causing stress, high body temperature, appetite loss, sadness and sleep disturbances (American Addiction Center 2024). Babies exposed to ecstasy in utero may face increased risks of congenital defects (cleft palate, gastroschisis, biliary atresia, and neural tube defects), cardiovascular (cardiac defects) and musculoskeletal issues (limb reduction), low birth weight, smaller head circumference at birth, motor delays, and developmental problems (Landry 2002). However, prospective studies have not consistently found such associations, except for cleft palate. Infants exposed to methamphetamines may experience amphetamine withdrawal syndrome with symptoms like jitteriness, drowsiness, and respiratory distress, though only a few need a pharmacological treatment (Smid etal. 2019). MDMA exposure in the rst trimester can lead to long-term memory and learning issues in children.
22.5 Opioids/Opiates inthePerinatal Period
A large cohort study involving pregnant women who use prescription opioids reported a 30–60% increase in the risk of neonatal drug withdrawal associated with co-exposure to other psychotropic drugs compared with opioids alone (Huybrechts etal. 2017). A chronic untreated addiction to heroin in pregnancy has been associ­ated with lack of prenatal care, increased risk of foetal growth restriction, abruptio placentae, foetal death, preterm labour, and intrauterine passage of meconium (CSAT 2005). Babies born from heroin-dependent mothers often present with a neonatal abstinence syndrome, which manifests as restlessness, yawning, acute cry­ing, tremors, watery stools, hypertonia, seizures and vomiting. There is also a risk of sudden unexplained death in infancy (Dryden etal. 2009; Wachman etal. 2011; Hwang etal. 2016; Huybrechts et al. 2017; Flannagan etal. 2020; Varney et al.
2024). According to some studies, naloxone, a specic opioid antagonist, could be
used to treat infants with cardiorespiratory or neurological depression due to intra­uterine opioid exposure. However, current evidence from randomized controlled trials is insufcient to determine whether naloxone provides signicant benets
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given some concerns about its safety (Moe-Byrne etal. 2018). Moreover, rates of unwanted pregnancy among women using opioids are remarkably high, with unwanted pregnancies reported in 85% of women using opioids during pregnancy, compared to 45% of the general population (Auerbach etal. 2021). Furthermore, an untreated opioid use disorder has been associated with engagement in high-risk activities, such as prostitution, trading sex for drugs, and criminal activities. Long­term outcomes of infants with in utero opioid exposure have been evaluated in sev­eral observational studies, reporting no signicant differences in cognitive development between children up to 5years of age exposed to methadone in utero and control groups matched for age, race and socioeconomic status, although scores were often lower in both groups compared with general population (Kaltenbach and Finnegan 1984).
The safety of opioids during early pregnancy has been evaluated in several obser­vational studies. Earlier reports have not shown an increased risk of birth defects after prenatal exposure to oxycodone, meperidine and propoxyphene (Bracken and Holford 1981; Jick et al. 1981). An association between rst-trimester use of codeine and congenital abnormalities has been reported in some studies (Zierler and Rothman 1985; Broussard etal. 2011) but not in others (Shaw etal. 1992; Nezvalova- Henriksen etal. 2011). An observational study found a possible association between use of opioids during the rst trimester and neural tube defects (Yazdy etal. 2013; Wang etal. 2022). Some studies have also identied a link between prenatal opioid exposure and birth defects, albeit rare, such as congenital heart defects, cleft palate and clubfoot (Yazdy etal. 2013; Källén etal. 2013; Lind etal. 2017; Wang etal.
2022). Developmental delays in children exposed to opioids are possible compared
to their non-exposed peers (Welton etal. 2019).
In contrast, recent studies have shown that tapering the dosage, or carrying out an opioid detoxication, does not increase the risk of adverse pregnancy outcomes, resulting in neither an increased foetal risk associated with detoxication nor an increased risk of preterm delivery (Towers etal. 2020). Comparing detoxication treatment with opioid substitution therapy (ORT) shows an increased risk of relapse with detoxication treatment compared to ORT; however, detoxication does not alter the risk of stillbirth, preterm birth (PTB) nor neonatal abstinence syndrome (NAS) (Wang etal. 2019). Methadone is commonly used as an opioid agonist medi­cation, providing stability of opioid levels, preventing withdrawal cycles, and improving engagement with obstetric care. However, its use is limited by stringent observation protocols and the risk of overdose. Children born to mothers who were prescribed with methadone during pregnancy have a high risk for behavioural prob­lems, poor motor performance, poor ne motor coordination, short attention span, and low cognitive performance. Nystagmus and strabismus are more frequent in methadone-exposed children than in non-methadone-exposed peers (Monnelly etal. 2019). Another alternative to methadone is buprenorphine. As a partial opioid receptor agonist, it has a limiting effect on respiratory depression, reducing the risk of harm in the event of an overdose. It also offers a more favourable neonatal opioid withdrawal prole than methadone and has been associated with more positive neo­natal outcomes than methadone. These include better levels of birth weight, longer
22 Substance Use Disorders
body length at birth, and reduced risk of prematurity (Kinsella etal. 2022). Pregnant women receiving treatment for opioid use disorder with the buprenorphine- naloxone combination have comparable pregnancy outcomes to those undergoing treatment with other forms of opioid agonist medication-assisted therapy (Link etal. 2020; Ordean and Tubman-Broeren 2023).
Fentanyl, a highly potent synthetic opioid commonly used in patients undergoing general anaesthesia, including women undergoing various surgical procedures dur­ing pregnancy and for epidural analgesia during labour, rapidly transfers to the pla­centa and foetal brain, with detectable accumulation in these tissues (British Columbia Centre on Substance Use 2018; Alipio et al. 2021). Studies in animals suggest prenatal fentanyl exposure may lead to increased newborn mortality, with­drawal symptoms, ADHD, autism-like traits and schizophrenia. These ndings highlight the complex risks of opioid exposure during pregnancy, particularly with potent opioids like fentanyl (Wouldes etal. 2023).
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22.6 Pharmacological Management ofSubstance Use
Disorders During thePerinatal Period
In general, substance-dependent pregnant women should be optimally treated with a multi-disciplinary and multi-professional approach with treatment being tailored individually to the kind of substance dependence (Woolf etal. 2003; Metz et al.
2012; WHO 2014) (Table22.1).
There are no ofcially approved pharmacological treatments for the manage­ment of a cannabis use disorder in pregnancy. No medication is approved speci­cally for the treatment of cannabis intoxication. Pregnant women could usually manifest mild cannabis withdrawal symptoms including sleep disturbances, irrita­bility, loss of appetite, restlessness, nausea and cramps which could be managed by prescribing symptomatic pharmacotherapy (Rayburn and Bogenschutz 2004; CAMH 2012). Evidence advice for all pregnant women is to discontinue cannabis use, although for some women this may not be possible without professional sup­port. Pharmacological interventions for cannabis withdrawal have been explored, though studies often have small sample sizes (Connor etal. 2022). Some trials using standardized withdrawal scoring systems reported better symptom relief with medi­cations compared to placebo. Effective treatments include dronabinol (Levin etal.
2011), quetiapine (Mariani etal. 2021), nabiximols (Trigo etal. 2016), gabapentin
(Mason etal. 2012), and oral THC (Budney etal. 2007), which reduced withdrawal symptoms and cravings in cannabis-dependent individuals. To date, dronabinol has been the medication most investigated. Dronabinol has been assigned by the Food and Drug Administration (FDA) to pregnancy category C, i.e., animal studies have revealed evidence of decreased maternal weight gain and decreased number of off­spring, increased foetal mortality, and early foetal resorptions. Exposure to dronabi­nol during pregnancy and lactation in mice caused anxiety-like and depressive behaviours, cognitive impairments, and disruptions in the reward system, with increased motivation for alcohol consumption in offspring. These effects, linked to