Antihypertensive (Angiotensin II Receptor Blocker - ARB)
Last reviewed June 2026
Who is this for?
Losartan is a blood pressure-lowering drug that works by relaxing your blood vessels so blood can flow more easily, reducing the pressure on your heart.
Blocks angiotensin II type 1 (AT1) receptors on vascular smooth muscle and aldosterone-secreting cells, preventing vasoconstriction and sodium retention, thereby reducing blood pressure and protecting end-organ function.
Prescription Required
You need a doctor's prescription to buy this drug.
Explore this drug
Adults usually start with one 50mg tablet taken once a day, with or without food. Your doctor may increase it to 100mg once daily if your blood pressure is not well controlled. Try to take it at the same time every day. Popular brands in Nigeria include Emzor Losartan, Heartlic, AG Losartan, Czartan, and Azegnar.
If you miss a dose, take it as soon as you remember. But if it is almost time for your next dose, skip the missed one and continue your normal schedule. Do not take two tablets at once to make up for the one you missed.
Do not stop taking losartan suddenly because your blood pressure feels normal — high blood pressure often has no symptoms but can still damage your body. Buy only from licensed pharmacies and look out for trusted Nigerian brands like Emzor Losartan, Heartlic, Czartan, or Azegnar. Do not share your blood pressure medication with others, even if they have similar symptoms — dosage must be prescribed individually by a doctor.
Avoid taking losartan with potassium supplements or salt substitutes that contain potassium, as this can cause dangerously high potassium levels. Be careful if you also use painkillers like ibuprofen or diclofenac regularly, as they can reduce losartan's effect and harm your kidneys. Alcohol can increase the blood pressure-lowering effect and make you feel more dizzy, so limit your intake.
Check your specific combination
Is it safe to take Losartan with your other drugs?
Losartan is NOT safe during pregnancy — it can cause serious harm or death to your unborn baby, especially in the second and third trimesters. If you are pregnant, planning to become pregnant, or breastfeeding, tell your doctor immediately.
Store in a cool, dry place away from direct sunlight and heat — Nigerian weather can be very hot, so avoid leaving it on windowsills or in your car. Keep the tablets in their original pack and far away from children.
For information only — not medical advice. Always talk to a doctor or pharmacist before changing your medication.
Names this drug is sold under — especially in Nigerian and West African pharmacies
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Counterfeit Drug Warning
Fake drugs are a serious problem in Nigeria. Always buy from a registered pharmacy. If the packaging looks different from what is described above, do not use it.
Dispensing Losartan Potassium?
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