Before taking any medication, please consult your primary care physician with any pre-existing medical illnesses such as hypertension before taking any OTC or prescription drugs. If you do not have control of your blood pressure, excessive dosage of any medication can lead to potentially fatal interactions with your body and/or daily medicine.
If you have consulted your doctor and they have said it is safe to take an anti-histamine medication, many would recommend Diphenhydramine HCl (Common brand names include: Benadryl).
