Resumen
OBJETIVO: para evaluar si un medicamento anticonvulsivante es recomendable para una mujer fértil _o en estado de embarazo_ que padece de epilepsia, se debe revisar todos los cambios que se dan durante la gestación y que influyen en la forma de tratar este tipo de pacientes.
DESARROLLO: se revisan los aspectos relacionados con la epilepsia en la mujer embarazada, la frecuencia, los riesgos para la madre y el feto, las causas de la dificultad para mantener el control de las crisis en la gestación, los factores que influyen sobre el paso de fármacos a través de la placenta, la seguridad de los anticonvulsivantes, los mecanismos de teratogenicidad, los cambios farmacocinéticos de los anticonvulsivantes inducidos por el embarazo y la identificación de problemas fetales por el uso de anticonvulsivantes en el embarazo.
CONCLUSIONES: el embarazo es generalmente seguro en la mujer con epilepsia, pero el apoyo preconcepcional requiere de un trabajo cercano entre el neurólogo y el ginecólogo. El efecto adverso de los antiepilépticos sobre el embarazo se ha reconocido desde tiempo atrás pero el riesgo relativo de efectos fetales y maternos de cada anticonvulsivante aún no se ha definido.
Citas
Hauser WA, Annegers JF, Kurland LT. Prevalence of epilepsy in Rochester, Minesota, 1940-1980. Epilepsia 1991; 31: 429.
Schmidt D, Canger R, Avanzini G, et al. Change of Seizure Frequency in Pregnant Epileptic Women. J Neurol Neurosurg Psychiatry 1983: 46; 751-755.
Knight AH, Rhind EG. Epilepsy and Pregnancy: A Study of 153 pregnancies in 59 patients. Epilepsia 1975; 16: 99-110.
Lindhout D, Omtzigt JGC. Teratogenic Effects of Antiepileptic Drugs: Implications for the Management of Epilepsy in Women of Childbearing Age. Epilepsia 1994; 35: S19-S28.
Stumpf DA, Frost M. Seizures, anticonvulsants and pregnacy. Am J Dis Child 1978; 132: 746-748.
Teramo K, Hiilesmaa V, Bardy A, Saarihosk S. Fetal Heart Rate During a Maternal Grand Mal Epileptic Seizure. J Perinat Med 1979; 7: 3-6.
Yerby MS. Problems and management of the pregnant woman with epilepsy. Epilepsia 1987; 28: S29-S36.
Bauer J. Interactions between hormones and epilesy in female patients. Epilepsia 2001; 42: 20-22.
Delgado-Escueta AV, Janz D. Consensus guidelines: preconception counseling, management, and care of the pregnant woman with epilepsy. Neurology 1992; 42: 149-160.
Malone FD, D’Álton ME. Drugs in Pregnancy: anticonvulsants. Semin Perinatol 1997; 21: 114-123.
Yerby MS, Friel PN, McCormick KB, Koerner M, VanAllen M, Leavit AM, Sells CJ, Yerby JA. Pharmacokinetics of Anticonvulsants in Pregnancy: Alterations in PlasmaProtein Binding. Epilepsia 1990; 5: 223-228.
Gonzalez R. El uso de medicamentos durante el embarazo. Revista médica de Costa Rica y Centroamérica 1998; 1: 9-16.
Strickler SM, Dansky LV, Miller MA, Seni MH, Andermann E, Spielberg SP. Genetic predisposition to phenytoin induced birth defects. Lancet 1985; 1: 746-749.
Licht, EA, Sankar R. Status Epilepticus During Pregnancy: a case report. J Reprod Med 1999; 44: 370-372.
Friis ML, Broeng-Nielsen B, Sindrup EH. Facial clefts among epileptic patients. Arch Neurol 1981; 38: 227-229.
Friis ML. Holm NV, Sindrup EH. Facial clefts in sibs and children of epileptic patients. Neurology 1986; 36: 346-350.
Perucca E, Beghi E, Dulac O, Shorvon S, Tomson T. Assessing risk to benefit ratio in antiepileptic drug therapy. Epileptic Res 2000; 41: 107-139.
Raymond GV, Buehler BA, Finell RH, Holmes LW. Anticonvulsant teratogenesis: three possible metabolic basis. Teratology 1995; 51: 55-56.
Shum S, Jensen NM, Nebert DW. The Ah locus; in utero toxicity and teratogenesis associated with genetic differences in B(a)P metabolism. Teratology 1979; 20: 365-376.
Ornoy A, Arnon J. Outcome of children exposed in utero to antiepileptic drugs: special emphasis on carbamazepine. Contemp Rev Obstet Gynecol 1998; 10: 99-106.
Jerina DM, Daly JW. Arene oxides: a new aspect of drug metabolism. Science 1974; 197: 185-573.
Vestermark V, Vestermark S. Teratogenic effect of carbamazepine. Arch Dis Child 1991; 66: 641-642.
Milunsky A. Multivitamin/folic acid supplementation in early pregnancy reduces the prevalence of neural tube defects. JAMA 1989; 262: 2847-2852.
Annegers JF, Elveback LR, Hauser WA, Kurland LT. Do anticonvulsants have a teratogenic effect? Arch Neurol 1974; 31: 364-373.
Jerina DM, Daly JW. Arene oxides: a new aspect of drug metabolism. Science 1974; 197: 185-573.
Sims P, Grover PL. Epoxides in polycyclic aromatic hydrocarbon metabolism and carcinogenesis. Adv Cancer Res 1974; 20: 165.
Shum S, Jensen NM, Nebert DW. The Ah locus; in utero toxicity and teratogenesis associated with genetic differences in B(a)P metabolism. Teratology 1979; 20: 365-376.
Pacifici GM, Colizzi C, Giuliani L, Rane A. Cytosolic epoxide hydrolase infetal and adult human liver. Arch Toxicol 1983; 54: 331.
Buehler BA, Delmont D, van Waes M, Finnel RH. Prenatal prediction of risk of the fetal hydantoin syndrome. N Engl J Med 1990; 322: 1567-1572.
Strickler SM, Dansky LV, Miller MA, Seni MH, Andermann E, Spielberg SP. Genetic predisposition to phenytoin induced birth defects. Lancet 1985; 1: 746-749.
Dansky LV, Rosenblatt DS, Anderman E. Mechanisms of teratogenesis: Folic acid and antiepileptic therapy.
Neurology 1992; 42: 32-42.
Zhou M, Zhou S. Reduction of the teratogenic effects of phenytoin by folic acid and mixture of folic acid, vitamins, and amino acids: a preliminary trial. Epilepsia 1989; 30: 246-251.
Dansky LV, Rosenblatt DS, Anderman E. Mechanisms of teratogenesis: Folic acid and antiepileptic therapy. Neurology 1992; 42: 32-42.
Bernus I, Hooper WD, Dickinson RG, Eadie MJ. Effects of pregnancy on various pathways of human antiepileptic drug metabolism. Clinical Neuropharmacology 1997: 20: 13-21.
Nulman I, Laslo D, Koren G. Treatment of epilepsy in pregnancy: Drugs 1999; 57: 535-544.
Thomson AH, Brodie MJ. Pharmacokinetic optimisation of anticonvulsant therapy. Clin Pharmacokinet 1992; 23: 216-230.
Bulau P, Paar WD, Von Unruh GE. Pharmacokinetics of Oxcarbazepine and 10- Hydroxy-carbazepine in the newborn child of an oxcarbazepine treated mother. Eur J Clin Pharmacol 1988; 34: 311-313.
Kelly TE. Teratogenicity of anticonvulsants drugs: review of the literature. Am J Med Genet 1984; 413-434.
Loughnan PM, Gold H, Vance JC. Phenytoin teratogenicity in man. Lancet 1973; 1: 170-172.
Dalens B, Raynaud EJ, Gaulme J. Teratogenicity of valproic acid. J Pediatr 1980; 97: 332-333.
McLean MJ. Gabapentin. Epilepsia 1995; 36: S73-S86.
Ohman I., Vitols S., Tomson T. Lamotrigine in pregnancy: pharmacokinetics during delivery, in the neonate and during lactation. Epilepsia 2000; 41: 709-713.
Brown JP, Boden P, Singh L, Gee NS. Mechanisms of action of gabapentin. Rev Contemp Pharmacother 1996; 7: 203-14.
Harden CL. New antiepeleptic Drugs. Neurology 1994; 44: 787-795.
Morrell MJ. The New Antiepileptic Drugs and Women: Efficacy, Reproductive Health, Pregnancy, and Fetal Outcome. Epilepsia 1996; 37: S34-44.
Briggs GC, Freeman RK, Yaffle SJ. Drugs in pregnancy and lactation: a reference guide to fetal an neonatal risk (ed 4). Baltimore, MD, Williams and Wilkins, 1994.
Annegers JF, Baumgartner KB, Hauser Wa, et al. Epilepsy, antiepiltic drugs, and the risk of spontaneous abortion. Epilepsia 1988: 29: 451-458.
Gutierrez-Alvarez AM. Uso de anticonvulsivantes durante el embarazo y el riesgo de malformaciones mayores en el recién nacido: meta-analisis. Rev Neurol 2003; 37: 1022-1028.
Adab N, Tudur Smith C, Vinten J, Williamson P, Winterbottom J. Common antiepileptic drugs in pregnancy in women with epilepsy (Cochrane Review). In: The Cochrane Library, Issue 4, 2004. Oxford: Update Software.

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