Blood pressure medicine causes dizziness, fatigue, loss of balance in senior citizen

Doctors are always measuring the blood pressure and sugar levels in those who come for a health checkup. They will often prescribe strong medicines for those who have high blood pressure
However, the side effects of these medicines are very severe and are not documented at all
A senior citizen was able to move about independently for some time.
However after he was prescribed strong blood pressure medicines he started suffering from fatigue, loss of balance and became very weak, though the BP levels reduced greatly.
Earlier he could get up from the sofa alone, yet after taking the medicine, he was unable to get up alone, without any assistance,
Only after the medicine was stopped for some time, the condition improved slightly.