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    Extended-Release Tablets

    doxylamine succinate 20 mg, pyridoxine hydrochloride 20 mg

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    Initially, take one extended-release tablet orally at bedtime (Day 1). If this dose adequately controls symptoms the next day, continue taking one tablet daily at bedtime only. However, if symptoms persist on Day 2, increase the daily dose to one tablet in the morning and one tablet at bedtime. The maximum recommended dose is two tablets per day, one in the morning and one at bedtime.
    Take on an empty stomach with a glass of water. Swallow tablets whole. Do not crush, chew, or split tablets.


    Indicated for the treatment of nausea and vomiting of pregnancy in women who do not respond to conservative management.


    -Known hypersensitivity to doxylamine succinate, other ethanolamine derivative antihistamines, pyridoxine hydrochloride or any inactive ingredient in the formulation.
    -Concomitant use with Monoamine oxidase (MAO) inhibitors intensify and prolong the adverse central nervous system effects of the drug.

    Special Precautions

    The drug may cause somnolence due to the anticholinergic properties of doxylamine succinate, an antihistamine. Women should avoid engaging in activities requiring complete mental alertness, such as driving or operating heavy machinery, while using the drug until cleared to do so by their healthcare provider.
    The use is not recommended if a woman is concurrently using central nervous system (CNS) depressants including alcohol. The combination may result in severe drowsiness leading to falls or accidents. See prescribing information for full details.

    Side Effects

    -Falls or other accidents resulting from the effect of the combined use of the drug with CNS depressants including alcohol. See prescribing information for full details.

    Drug interactions

    Use is contraindicated in women who are taking monoamine oxidase inhibitors (MAOIs), which prolong and intensify the adverse central nervous system effects (the anticholinergic effects) of antihistamines.  The drug has anticholinergic properties and, therefore, should be used with caution in women with asthma, increased intraocular pressure, narrow angle glaucoma, stenosing peptic ulcer, pyloroduodenal obstruction or urinary bladder-neck obstruction.

    Pregnancy and Lactation

    Pregnancy: the drug is intended for the treatment of nausea and vomiting of pregnancy in women who do not respond to conservative management. Maternal risks are discussed throughout the labeling. No increased risk for congenital malformations has been reported in epidemiologic studies in pregnant women.
    : Pyridoxine hydrochloride is excreted into breast milk. There have been no reports of adverse events in infants presumably exposed to pyridoxine hydrochloride through breast milk.


    The drug is an extended-release formulation; therefore, signs and symptoms of intoxication may not be apparent immediately.
    Signs and symptoms of overdose may include restlessness, dryness of mouth, dilated pupils, sleepiness, vertigo, mental confusion and tachycardia.
    At toxic doses, doxylamine exhibits anticholinergic effects, including seizures, rhabdomyolysis, acute renal failure and death.
    Management of Overdose
    If treatment is needed, it consists of gastric lavage or activated charcoal, whole bowel irrigation and symptomatic treatment.

    Important notes

    There have been reports of false positive urine screening tests for methadone, opiates, and PCP with doxylamine succinate/pyridoxine hydrochloride use.

    Duchesnay Inc., Blainville, Quebec, Canada