En
Unfortunately, we may not advise you regarding the choice and dose of the drug; your attending doctor only may prescribe you a drug and advise on its dose during a personal visit.
It is widely acknowledged that in order to control blood pressure in hypertension one need to take the drug on a regular basis (daily). It is possible to assume that in your case you need to reduce the dose to 40 mg which makes a half tablet. Thus, you may protect yourself from adverse effects of hypertension.