doxylamine succinate /dok′silam″ēn/ , an antihistamine. ▪ INDICATIONS: It is prescribed for the treatment of acute allergic symptoms produced by the release of histamine. ▪ CONTRAINDICATIONS: Known hypersensitivity to this drug prohibits its use. It is not recommended for use during pregnancy or lactation and is not given to children less than 6 years of age. ▪ ADVERSE EFFECTS: Among the more serious reactions are sedation, ataxia, tachycardia, hemolytic anemia, and thrombocytopenia.