About Hydrochlorothiazide
Medically reviewed by Dr Khizer Hussain Junaidy, MD Pharmacology, Diabetologist & Bariatric Physician, on 23 Oct 2026.
What it is for
A water tablet (diuretic) that lowers BP. Often combined with telmisartan, olmesartan or losartan.
How to take it
Take it in the morning, so you do not need to pass urine at night.
Common side effects
- Passing more urine.
- Low sodium or potassium.
- Higher uric acid or sugar in some people.
Call your doctor if
- Muscle cramps, weakness or confusion.
- Severe dizziness.
Take care
Tell the doctor about gout.
From our clinic: Blood salts (sodium, potassium) are checked after starting.
About Olmesartan
Medically reviewed by Dr Khizer Hussain Junaidy, MD Pharmacology, Diabetologist & Bariatric Physician, on 23 Oct 2026.
What it is for
Lowers blood pressure.
How to take it
Take it once a day, with or without food.
Common side effects
- Dizziness on standing.
- Rarely, long-lasting diarrhoea with weight loss.
Call your doctor if
- Pregnancy or planning one.
- Diarrhoea that lasts weeks with weight loss.
- Swelling of the face or lips.
Take care
Not for use in pregnancy. Avoid potassium salt substitutes unless the doctor says so. Avoid regular painkillers like diclofenac or ibuprofen unless the doctor agrees.
From our clinic: Check your BP at home and bring the readings to your visit.
General information for patients, not a substitute for your doctor's advice. Your dose and plan may differ.