Benadryl hydrochloride tablets can be taken twice in the morning and evening, the specific method of taking and dosage is recommended to consult a doctor in time, after the doctor’s comprehensive assessment of the condition to decide. Benadryl hydrochloride tablets belong to the common antihypertensive drugs, after taking it can reduce the blood pressure in a short period of time, and after adhering to the long-term regular use, it can control the blood pressure in the ideal range; it is mainly used for the treatment of hypertension, congestive heart failure and other diseases. If the maximum daily dose is 40mg, it can be taken twice a day in the morning and evening, 20mg each time; if the maximum daily dose is 10mg, it can only be taken once a day, in the morning or evening. Therefore, Benadryl hydrochloride tablets can be taken twice in the morning and evening, and the specific dosage should follow the doctor’s instructions. Secondly, the drug in the process of taking, some patients may appear dizziness, drowsiness, nausea and other uncomfortable symptoms; therefore, for the operation of the tower crane, driving a vehicle hypertensive patients, need to be careful with the drug, to avoid accidents; and for the drug component allergy is prohibited, to avoid allergic symptoms. All of the above medication should be used under the guidance of a doctor, avoid self-medication, so as to avoid adverse consequences.