Benadryl hydrochlorothiazide tablets are effective in the treatment of hypertension, patients need to follow the instructions or follow the doctor’s advice to use the drug. Benadryl hydrochlorothiazide tablets are mainly used for the treatment of hypertension in the clinic, applicable to patients who can not achieve satisfactory efficacy of monotherapy, the recommended dose of 10/12.5mg, once a day, can be adjusted according to the level of control of blood pressure dosage, according to the different levels of high and low blood pressure, you can choose to break the dosage or increase the dosage. Adverse reactions include headache, dizziness, malaise, drowsiness, nausea, dry cough, arthralgia, myalgia, and asthma; angioneurotic edema is rare. Hypersensitivity to any of the single components of the drug, or to other sulfonamide derivatives is contraindicated. It is contraindicated in the presence of a history of neuroangioedema, severe renal failure, isolated kidneys, transplanted kidneys, pregnant women and patients with symptomatic hyperuricemia. Patients are advised to use the drug under the supervision of a physician and to seek prompt medical attention in case of adverse reactions.