The most frequent adverse reactions are italicized:
Sedation, sleepiness, dizziness, disturbed coordination, fatigue, confusion, restlessness, excitation, nervousness, tremor, irritability, insomnia, euphoria, paresthesia, blurred vision, diplopia, vertigo, tinnitus, acute labyrinthitis, hysteria, neuritis, convulsions.
Epigastric distress, anorexia, nausea, vomiting, diarrhea, constipation.
Thickening of bronchial secretions, tightness of chest and wheezing, nasal stuffiness.
Hypotension, headache, palpitations, tachycardia, extrasystoles.
Hemolytic anemia, thrombocytopenia, agranulocytosis.
Urinary frequency, difficult urination, urinary retention, early menses.
Urticaria, drug rash, anaphylactic shock, photosensitivity, excessive perspiration, chills, dryness of mouth, nose and throat.