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Prescription requiredDr Reddys Laboratories LtdAnti-hypertensive

Olsertain 20 Activ

Olmesartan (40mg)

Olsertain 20 Activ is used for olsertain 40 Tablet is used in the treatment of high blood pressure.

Medically reviewed by Dr. Balaji Krishnan, MBBS · Updated September 2026

₹82
Licensed pharmacyPharmacist-verified orderDelivered across India

Key details

Salt: Olmesartan (40mg)
Available variants: NA 30`S
Best price: ₹82
Prescription: Required
Manufacturer: DR.REDDYS

Ordering notes

Standard delivery across India. No same-day delivery nationally.
Chennai express delivery is possible and chargeable. Learn more
Returns & refunds: orders can be cancelled before dispatch; after dispatch, returns depend on the item category. Read the full policy

Composition of Olsertain 20 Activ

Olsertain 20 Activ contains Olmesartan (40mg). It belongs to the Angiotensin receptor blocker / ACE inhibitor class of medicines.

Uses of Olsertain 20 Activ

Olsertain 40 Tablet is used in the treatment of high blood pressure.

Key benefits

  • Protects the kidneys in diabetes
  • Reduces the long-term risk of stroke and heart attack
  • Usually taken once a day

How Olsertain 20 Activ works

Olsertain 40 Tablet is an angiotensin receptor blocker (ARB). It relaxes blood vessel by blocking the action of a chemical that usually makes blood vessels tighter. This lowers the blood pressure, allowing the blood to flow more smoothly to different organs and the heart to pump more efficiently.

How to take Olsertain 20 Activ

Take this medicine in the dose and duration as advised by your doctor. Swallow it as a whole. Do not chew, crush or break it. Olsertain 40 Tablet may be taken with or without food, but it is better to take it at a fixed time.

Take it exactly as your doctor prescribed. Do not change the dose or stop early on your own.

Missed dose and overdose

If you miss a dose

Take it as soon as you remember. If your next dose is almost due, skip the one you missed — never take two doses together to catch up.

If you take too much

An overdose of this medicine can cause a severe fall in blood pressure, with dizziness, fainting and a fast or slow pulse. Do not wait for symptoms to appear — go to the nearest emergency department and take the pack or strip with you.

Side effects of Olsertain 20 Activ

Most side effects of Olsertain are mild and settle as the body adjusts. Reported side effects include:

  • Dizziness Back pain Sinus inflammation Increased potassium level in blood

Stop the medicine and seek help immediately for a rash, swelling of the face or lips, wheezing or difficulty breathing. Tell your doctor about any side effect that persists or worries you.

Safety advice for Olsertain 20 Activ

PregnancyOlsertain 40 Tablet is unsafe to use during pregnancy.<br>There is positive evidence of human fetal risk, but the benefits from use in pregnant women may be acceptable despite the risk, for example in life-threatening situations. Please consult your doctor.
BreastfeedingOlsertain 40 Tablet is probably safe to use during lactation. Limited human data suggests that the drug does not represent a significant risk to the baby.
AlcoholTaking Olsertain 40 Tablet with alcohol may excessively lower the blood pressure.
DrivingMay cause drowsiness or affect your concentration. Do not drive until you know how it affects you.
KidneyOlsertain 40 Tablet should be used with caution in patients with severe kidney disease. Dose adjustment of Olsertain 40 Tablet may be needed. Please consult your doctor.<br>Regular monitoring of blood pressure is advisable for dose adjustment.
LiverOlsertain 40 Tablet should be used with caution in patients with severe liver disease. Dose adjustment of Olsertain 40 Tablet may be needed. Please consult your doctor.<br>No dose adjustment is recommended in patients with mild liver disease.
Habit formingNo

Warnings and precautions

Stand up slowly for the first few days — dizziness on rising is common when you start or your dose goes up. Stop and seek urgent care if your lips, tongue, face or throat swell, or you have difficulty breathing. A persistent dry, tickly cough can be caused by the ACE inhibitor group; tell your doctor rather than stopping on your own, as an alternative exists. Your doctor will check your kidney function and potassium after starting and after any dose change. Do not use salt substitutes containing potassium without asking your doctor.

Do not take Olsertain if

Not for anyone with a known allergy to this medicine or to any ingredient in the pack. Must not be used in pregnancy — it can seriously harm the developing baby. Not for people with narrowing of both kidney arteries, or a history of swelling of the face and throat caused by this group of medicines.

Interactions with other medicines

Anti-inflammatory painkillers reduce the effect and can harm the kidneys when combined. Potassium supplements, potassium-sparing water tablets and salt substitutes can push potassium too high. Lithium levels rise when taken with these medicines.

How to store Olsertain 20 Activ

Store below 30°C in the original pack, away from direct sunlight and moisture. Keep out of the reach of children.

Expert advice for Olsertain 20 Activ

<div class="style__desktop-container___1hcBT"><div class="style__desktop-video___2GTR9"><div class="styles__video-img___1rCzR"><div class=""/><div class=""/></div></div><div><div><div><div><div class="ExpertAdviceItem__content___1Djk2"><ul><li><div>You have been prescribed Olsertain 40 Tablet to improve your blood pressure.</div></li> <li><div>Lowering blood pressure reduces the chance of future heart attack &amp; stroke.</div></li> <li><div>It may also be used to treat chronic (long-standing) heart failure.</div></li> <li><div>It protects kidney function which is especially useful for people with diabetes or mild-to-moderate kidney diseases.</div></li> <li><div>It can make you feel dizzy for the first few days. Take it preferably at bedtime and rise slowly if you have been sitting or lying down.</div></li> <li><div>It may increase the level of potassium in blood. Avoid taking potassium supplements and potassium-rich foods such as banana and broccoli.</div></li> <li>Do not take it during pregnancy or breastfeeding. Tell your doctor if you conceive while taking Olsertain 40 Tablet .</li></ul></div></div></div></div></div></div>

Manufacturer and class

Manufacturer:
DR.REDDYS
Therapeutic class:
Anti-hypertensive
Drug class:
Angiotensin receptor blocker / ACE inhibitor

Substitutes for Olsertain 20 Activ

Medicines with the same active ingredient (Olmesartan (40mg)). Ask your doctor or pharmacist before switching brands.

MedicinePackPricevs Olsertain 20 Activ
Olmighty 40 TabletMerck Ltdtablet · 10`S₹12452% more
Olmetop 40Elbrit LIfe Sciences15`S₹227178% more
Olmetrack 40USV Ltd10`S₹259217% more
Olmezest 40SUN PHARMA10`S₹265225% more
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Olsertain 20 Activ FAQs

What is Olsertain 20 Activ used for?
Olsertain 20 Activ is commonly used for Olsertain 40 Tablet is used in the treatment of high blood pressure. Always follow your doctor's advice, this information is for educational purposes and not a substitute for professional medical guidance.
What is the salt in Olsertain 20 Activ?
Olsertain 20 Activ contains Olmesartan (40mg). If you are allergic to any of these active ingredients or excipients, do not take this medicine and speak to your doctor first.
How should I take Olsertain 20 Activ?
Take this medicine in the dose and duration as advised by your doctor. Take it exactly as prescribed; do not change the dose or stop early without talking to your doctor.
How does Olsertain 20 Activ work?
Olsertain 40 Tablet is an angiotensin receptor blocker (ARB).
Is Olsertain 20 Activ a prescription medicine?
Yes. Olsertain 20 Activ is a prescription-only (Rx) medicine. Upload a valid prescription from a registered medical practitioner during checkout. We cannot dispense it without a valid Rx.
What are the common side effects of Olsertain 20 Activ?
The side effects reported most often with Olsertain are Dizziness Back pain Sinus inflammation Increased potassium level in blood. Most are mild and settle as the body adjusts; tell your doctor if any of them persist or worry you, and stop the medicine and seek help at once for a rash, swelling of the face or lips, or difficulty breathing.
Can Olsertain 20 Activ be taken during pregnancy?
Olsertain 40 Tablet is unsafe to use during pregnancy.<br>There is positive evidence of human fetal risk, but the benefits from use in pregnant women may be acceptable despite the risk, for example in life-threatening... Always tell your doctor if you are pregnant, planning a pregnancy or breastfeeding before starting Olsertain.
Can I drink alcohol while taking Olsertain 20 Activ?
Taking Olsertain 40 Tablet with alcohol may excessively lower the blood pressure.
What if I miss a dose of Olsertain 20 Activ?
Take it as soon as you remember.
Is Olsertain 20 Activ habit forming?
No. Olsertain 20 Activ is not known to be habit forming when taken as prescribed.
How much does Olsertain 20 Activ cost on PingMeDoc Pharmacy?
Olsertain 20 Activ starts at ₹82 on PingMeDoc Pharmacy. Available in NA 30`S. Final price is confirmed at checkout and may vary by variant and location.
Who manufactures Olsertain 20 Activ?
Olsertain 20 Activ is manufactured by DR.REDDYS. PingMeDoc Pharmacy sources medicines only from licensed manufacturers and distributors.
How is Olsertain 20 Activ delivered?
Olsertain 20 Activ is delivered across India via our licensed pharmacy partners. Standard delivery timelines are confirmed at checkout. Chennai customers can opt for chargeable same-city express delivery.

Olsertain 20 Activ, Quick facts

Salt
Olmesartan (40mg)
Best price
₹82
Prescription
Required (Rx)
Schedule
Schedule H
Brand
Dr Reddys Laboratories Ltd
Manufacturer
DR.REDDYS
Therapeutic class
Anti-hypertensive
Drug class
Angiotensin receptor blocker / ACE inhibitor
Habit forming
No
Variants
NA 30`S
Delivery
Standard across India

References

The information on Olsertain 20 Activ is compiled from the manufacturer's prescribing information and the sources below, and is reviewed by a registered medical practitioner. It does not replace advice from your own doctor.

  1. PingMeDoc clinical monograph library — compiled from Indian package inserts, the Indian Pharmacopoeia
  2. CDSCO schedules and standard pharmacology references. Reviewed for patient readability. This is general information, not a substitute for your doctor's advice.
  3. Central Drugs Standard Control Organisation (CDSCO), Ministry of Health & Family Welfare, Government of India, approved drug and schedule listings.
  4. National List of Essential Medicines (NLEM) 2022, Government of India.
  5. Manufacturer's package insert / prescribing information for Olsertain 20 Activ.
  6. World Health Organization, ATC/DDD classification and Model Formulary for the active ingredient.

Next steps

Safety disclaimer

Product information is for general awareness and does not replace professional medical advice. Always follow a clinician's guidance and upload a valid prescription when required.