A second analysis from the Motherisk Program (in collaboration with the Pregnancy Healthline in Philadelphia) focused on astemizole. Three analyses of Swedish data explored meclizine in relation to birth defects 13, 14, 19. February 2021. Pedersen L, Skriver MV, Norgaard M, Sorensen HT. Since the primary period of susceptibility to human teratogens is the first eight weeks of pregnancy (approximately 10 weeks when counting from the date of last menstrual period) 76, a focus on medication exposure during the first trimester (since medication exposure data are often too imprecise to accurately focus on specific weeks) is appropriate. Gastrointestinal disorders: Common: Nausea, Dry mouth, Unknown: dyspepsia, vomiting, diarrhoea, abdominal pain, Hepatobiliary disorders: Unknown: Hepatitis, jaundice, Skin and subcutaneous disorders: Unknown: Skin rash, urticaria, exfoliative dermatitis, photosensitivity, Musculoskeletal and connective tissue disorders: Unknown: Muscle twitching, muscular weakness, Renal and urinary disorders: Unknown: Urinary retention. The baseline birth defects prevalence was 3.9%; among users of H -receptor antagonists, the prevalence was 2.4% (6/255) (OR: 0.46; 95% CI: 0.17-1.20)61 Ruigmez and colleagues reported on two cohorts of cimetidine- and ranitidine-exposed pregnancies one from Italy and one from the United Kingdom 64. Total birth defects among exposed: 579; NVP indication: 402; Allergy indication: 177 Baseline birth defects prevalence: 3.16%; Unadjusted OR (95% CI); among those with NVP indication: association with all birth defects: 0.98 (0.89-1.09); selected major birth defects: 0.94 (0.83-1.07); congenital heart defects: 0.89 (0.71-1.11); specific congenital heart defects: 0.78 (0.60-1.01); among those with allergy indication: all birth defect: 1.03 (0.89-1.20); selected major birth defects: 1.06 (0.88-1.28); congenital heart defects: 0.89 (0.63-1.24); specific congenital heart defects: 0.81 (0.55-1.20) [Reported in paper table 5]; only association reported for a specific defect was for congenital hip subluxation (previously associated with promethazine [Kullander and Klln, Promethazine, diphenhydramine, and meclizine; any anti-emetic; use during first trimester, Any major birth defect as ascertained by pediatrician and documented in medical records up to one year after birth, Total pregnancies: 6,376; pregnancies with infant follow-up: 5,753: antiemetics: 778; promethazine: 617; prochlorperazine: 91; diphenhydramine: 46; meclizine: 19; no antiemetics: 4,975, Any antiemetic: 34/778 (4.4%); promethazine: 27/617 (4.4%); diphenhydramine: 3/46 (6.5%); meclizine: 0/19; no antiemetics: 166/4,975 (3.3%) (See table V for more detailed results), Not calculated; authors noted increased risk of congenital diaphragmatic hernia associated with promethazine exposure, Canada, Italy (2) and France, Teratogen Information Services, Histamine blockers; any use during pregnancy [89% used in first trimester], Exposed to NTS; unexposed matched to exposed on several potential confounders, Self-reported through structured questionnaire; women (or their healthcare providers) TIS because of question about exposure, Any major birth defect ascertained through maternal self-report during postnatal follow-up telephone interview, Exposure anytime during pregnancy: Histamine blockers: 113; NTS: 113 Exposure during first trimester and had live birth: Histamine blockers: 98; NTS: 66, Histamine blockers: 3/98 (3.1%); NTS: 2/66 (3.0%), Not calculated; there was no significant difference in prevalence of birth defects among those exposed and unexposed to medications during pregnancy, Canada (Motherisk) and Italy, Teratogen Information Services, Terfenadine; use during first trimester and entire pregnancy, Self-reported through structured questionnaire; women (or their healthcare providers) called Canada or Italy TIS because of question about exposure. that the information presented will not include all information currently At this time the body of literature investigating other adverse pregnancy or developmental outcomes associated with prenatal use of antihistamines is much smaller than that focused on birth defects. Loebstein R, Lalkin A, Addis A, et al. Little if any is excreted unchanged in the urine; most appears there as degradation products that are almost completely excreted within 24 hours. For allergies, you may only need to take chlorphenamine on the days you feel you need to. The drug is widely distributed throughout the body including the CNS. The oldest case-control study included in this review was a letter to the editor published in The Lancet in 1961 reporting on the frequency of first trimester use of meclizine, dimenhydrinate, and cyclizine among mothers of 266 infants with birth defects, and mothers of two groups of control infants (n=266 in each control group) 44. Twenty-two case mothers had documentation in their prenatal record of first trimester exposure to an antihistamine compared with an expected frequency of 15.6 based on the larger population data (observed/expected ratio: 1.4; 95% CI: 0.9-2.1). A prospective controlled trial of 68 pregnancies that had been exposed to chlorpheniramine The following drugs have been studied or used relatively often in pregnant women and are generally considered safe to use when you're expecting: Your doctor or midwife will likely suggest avoiding the following medications during pregnancy or may recommend skipping them in certain trimesters often because there's a concern that they could contribute to possible birth defects or pregnancy complications: Also keep in mind that herbal supplements (such as echinacea) haven't been well-studied in pregnant women (and some are dangerous), so skip them unless you've cleared a specific supplement with your provider. Pyloric stenosis and maternal Bendectin exposure. Children age 6 to under 12 years: The typical dose is 2 mg (half a tablet) every 4 to 6 hours. Chlorpheniramine is an antihistamine. Dr. Emery says that while there are other potential signs of labor, they have less real science to back them up. A total of 21 case-control studies that met inclusion criteria for this review reported findings with respect to histamine H1-receptor antagonists (Table 2). Each tablet contains chlorphenamine maleate 4mg, Yellow uncoated convex tablet with a breakline on one side. [ 1] It appears that the older sedating antihistamines, also known as first-generation agents, are safe in pregnancy. However, chlorphenamine can cause drowsy symptoms, so may also make your baby sleepy too. The American College of Obstetricians and Gynecologists. controlling for indication), the difference in the two groups was no longer noteworthy (4.4 per 1,000 compared with 3.6 per 1,000) 15. Not to be used during pregnancy unless considered essential by a physician. The 16 a priori analyses, selected based on previous reports in the literature, were: loratadine and hypospadias (see below in Second generation H1-receptor antagonists); diphenhydramine and CPO, CL/P, NTD, spina bifida, limb reduction defects, and gastroschisis; chlorpheniramine and eye defects, ear defects, spina bifida, and CL/P; and doxylamine and oral clefts, pyloric stenosis, hypoplastic left heart syndrome, spina bifida, and NTD. United States (Washington, Group Health Cooperative of Puget Sound), 1977-1979, Triprolidine hydrochloride + pseudoephedrine hydrochloride; diphenhydramine; use during first trimester, Any major birth defect identified from hospital discharge codes; all potential cases had medical records review to confirm diagnosis, Total pregnancies: 6,837; triprolidine + pseudoephedrine: 384; diphenhydramine: 361, Triprolidine + pseudoephedrine: 6/384 (16 per 1,000); diphenhydramine: 1/361 (3 per 1,000); baseline risk of birth defects: 11.7 per 1,000 (1.2%), Meclizine; use during early pregnancy (~before 10-12 weeks gestation), Exposure during early pregnancy ascertained prospectively during prenatal care by midwives, typically by 10-12 weeks gestation, Spectrum of major birth defects ascertained through linkage with other national databases, Total pregnancies: 540,660 (549,569 infants); meclizine: 16,536, Meclizine: 524/16,536 (3.16%); prevalence among unexposed not stated, Unadjusted OR (95% CI) for any birth defect identified in the Medical Birth Registry: 0.91 (0.83-0.99); table 6 shows observed/expected analyses (RRs and 95% CIs) for several selected defects; none are significantly elevated or decreased; potential signals for anal atresia (2.29; 0.99-4.50) and body wall defect (2.33; 0.94-4.81), Loratadine; use during early pregnancy (~before 10-12 weeks gestation). Aselton P, Jick H, Chentow SJ, et al. 1997-2023 BabyCenter, LLC, a Ziff Davis company. Continue typing to refine. Two distinct search strings were used, the results of which were combined and de-duplicated in a single EndNote X7 (Thomson Reuters, 1998-2013) library: Search string (2) was used to ensure that papers which had a primary focus on NVP, but reported analyses for antihistamine use were captured. Information on this website is provided for educational and Ann Allergy Asthma Immunol. Can I take chlorphenamine with painkillers? Chlorphenamine is known as a drowsy antihistamine because it can make you feel sleepy. According to ACOG, the safest first-generation antihistamines for pregnant women are: The American College of Allergy, Asthma, and Immunology (ACAAI) suggests Chlor-Trimeton (chlorpheniramine) as the first choice for pregnancy. Fetal safety of loratadine use in the first trimester of pregnancy: a multicenter study. These symptoms include If you or your child's symptoms do not get better within a few days, talk to a doctor. Second generation H1-receptor antagonists (e.g. The second Danish report was based on a case-control study nested within the Danish National Birth Cohort, in which 203 cases of hypospadias and 2,030 matched controls were identified. Skin conditions during pregnancy. Expert Opin Drug Saf. You are being redirected to Medscape Education. Does taking chlorpheniramine increase the chance for miscarriage? This can help protect your baby from whooping cough before he or she can be vaccinated. Concurrent use of chlorphenamine and hypnotics or anxiolytics may cause an increase in sedative effects, therefore medical advice should be sought before taking chlorphenamine concurrently with these medicines. It's best not to drink alcohol while you're taking chlorphenamine, as it can make you feel very sleepy. There is still a need for larger studies with clinical verification of birth defect subtypes, validation of maternal recall of medication exposures, and appropriate selection of study populations to follow-up on some of the signals found in previous studies, as well as a need to enrich the body of literature on H2-receptor antagonists, which are currently relatively understudied. Wear wraparound sunglasses to stop pollen getting into your eyes. Talk to your doctor or pharmacist if you're unsure how long you need to take chlorphenamine for. Drug certainty-response in interview-based studies. Common side effects include feeling sick (nausea), sleepy or dizzy. https://www.uptodate.com/contents/search. http://www.uptodate.com/contents/search. Pregnancy outcome after gestational exposure to terfenadine: A multicenter, prospective controlled study. There is not enough information to know if or how larger doses or taking small doses every day would affect a nursing child or milk production. Of the commonly used over-the-counter medications, acetaminophen, chlorpheniramine, kaolin and pectin preparations, and most antacids have a good safety record. Among those exposed to loratadine, 5/143 (3.5%) had a major birth defect, compared with 6/150 (4.0%) in the comparison group of women exposed to non-teratogens; these prevalence estimates were not significantly different 33. Two cohort studies have investigated the association between cetirizine use during pregnancy and birth defects 22, 35. American College of Obstetricians and Gynecologists. 2008. The safety of H(2)-blockers use during pregnancy. There also is a corticosteroid nasal spray that is . During pregnancy, it's usually best to buy the specific medications you need individually rather than a multi-symptom medication. Take the chlorphenamine packet or leaflet inside it, plus any remaining medicine, with you. information highlighted below and resubmit the form. If one of the two co-authors determined that the screened title and/or abstract needed a review of the full text, either because it appeared to meet inclusion criteria or it could not be determined whether it met inclusion criteria, the full text was retrieved and reviewed. Results of The Collaborative Perinatal Project found no increase in the The third trimester includes weeks 28 through 40 of a pregnancy. Additional data sources are sometimes linked to the information gathered during the initial telephone call or in the follow-up interview. Do not drive a car or ride a bike if chlorphenamine makes you sleepy during the daytime, gives you blurred vision or makes you feel dizzy, clumsy or unable to concentrate or make decisions. When distinct publications included overlapping data, it was noted in the text and notes for Tables 1 and and22. 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