Sunex Special Precautions

Anti-histamines should be used with considerable caution in patients with narrow-angle glaucoma, stenosing peptic ulcer, pyloroduodenal obstruction, symptomatic prostatic hypertrophy or bladder-neck obstruction. In infants and children, especially, anti-histamines in overdosage may cause hallucinations, convulsions or death.
As is adults, anti-histamines may diminish mental alertness in children. In the young child, particularly, they may produce excitation.
Experience with this drug in pregnant women is inadequate determine whether there exists a potential for harm to the developing foetus.
Patients should be warned about engaging in activities requiring mental alertness, such as driving a car or operating appliances, machinery etc.
Anti-histamines are more likely to cause dizziness, sedation and hypotension in elderly patients. Diphenhydramine hydrochloride has an atropine-like action and therefore should be used with caution in patients with a history of bronchial asthma, increased intraocular pressure, hyperthyroidism, cardiovascular disease or hypertension.
MAO inhibitors prolong and intensify the anti-cholinergic (drying) effects of anti-histamines.
Consult a physician if symptoms persist for more than 7 days, or if high fever, skin rash or continuing headache is present with cough. Not recommended for children below 2 years.
Use with caution and on physician's/pharmacist's advice in children 2 to 6 years of age.