Can use antihistamine to hypertensive patients?

Yes, antihistamines can generally be used in hypertensive patients, but caution is advised. Some first-generation antihistamines may cause sedation and have anticholinergic effects, which could potentially impact blood pressure. It's important for hypertensive patients to consult with their healthcare provider before starting any new medication, including antihistamines, to ensure it is safe and appropriate for their specific health situation.