SIDE EFFECTS
The most common effects associated with antihistamines have been drowsiness sedation, dryness of mucous membranes, and gastrointestinal effects. Serious side effects with oral antihistamines or sympathomimetics have been rare.
Other adverse reactions may include:
Dermatologic - urticaria, drug rash, photosensitivity, pruritus.
Cardiovascular - hypotension, hypertension, cardiac arrhythmias,
palpitations.
Central Nervous Systems (CNS) - disturbed coordination, tremor,
irritability, insomnia, visual disturbances, weakness, nervousness, convulsion,
headache, euphoria, and dysphoria.
Genitourinary - urinary frequency, difficult urination.
Gastrointestinal - epigastric discomfort, anorexia, nausea, vomiting,
diarrhea, constipation. Respiratory - tightness of the chest and wheezing, shortness
of breath. Hematologic - hemolytic anemia, thrombocytopenia, agranulocytosis.
DRUG INTERACTIONS
MAO inhibitors may prolong and intensify the anticholinergic effects of sympathomimetic
agents. Thus, concomitant administration of Deconsal® CT Tannate Chewable
Tablets and MAO inhibitors should be avoided (see "CONTRAINDICATIONS").