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Prescription requiredSun PharmaAnti-hypertensive and Diuretic

Olmezest Ch 20

Olmesartan (20mg) + Chlorthalidone (12.5mg)

Olmezest Ch 20 is used for olmezest CH 20 Tablet is used in the treatment of high blood pressure.

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

₹163
Licensed pharmacyPharmacist-verified orderDelivered across India

Key details

Salt: Olmesartan (20mg) + Chlorthalidone (12.5mg)
Available variants: NA 10`S
Best price: ₹163
Prescription: Required
Manufacturer: SUN PHARMA

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 Olmezest Ch 20

Olmezest Ch 20 contains Olmesartan (20mg) + Chlorthalidone (12.5mg). It belongs to the Angiotensin receptor blocker / ACE inhibitor and Water tablet class of medicines.

Uses of Olmezest Ch 20

Olmezest CH 20 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
  • Relieves swelling and breathlessness caused by fluid
  • Long-established blood pressure treatment
  • Inexpensive and once daily

How Olmezest Ch 20 works

Olmezest CH 20 Tablet is a combination of two medicines: Olmesartan and chlorthalidone which lower blood pressure effectively. Olmesartan is an angiotensin receptor blocker (ARB). It works by blocking the hormone angiotensin thereby relaxing blood vessels. This allows the blood to flow more smoothly and the heart to pump more efficiently. Chlorthalidone is a diuretic that removes extra water and certain electrolytes from the body. Over time it also relaxes blood vessels and improves blood flow.

How to take Olmezest Ch 20

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. Olmezest CH 20 Tablet is to be taken with food.

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. It can cause severe dehydration, a sharp fall in blood pressure and dangerous salt imbalances. Do not wait for symptoms to appear — go to the nearest emergency department and take the pack or strip with you.

Side effects of Olmezest Ch 20

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

  • Nausea Taste change Diarrhea Stomach upset Weakness Headache Dizziness Increased blood uric acid Increased blood lipid level Electrolyte imbalance Glucose intolerance Decreased blood pressure

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 Olmezest Ch 20

PregnancyOlmezest CH 20 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.
BreastfeedingOlmezest CH 20 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 Chlorthalidone with alcohol may have additive effects in lowering your blood pressure. You may experience headache, dizziness, lightheadedness, fainting, and/or changes in pulse or heart rate.
DrivingMay cause drowsiness or affect your concentration. Do not drive until you know how it affects you.
KidneyOlmezest CH 20 Tablet should be used with caution in patients with severe kidney disease. Dose adjustment of Olmezest CH 20 Tablet may be needed. Please consult your doctor.<br/>Use of Olmezest CH 20 Tablet is not recommended in these patients.
LiverOlmezest CH 20 Tablet should be used with caution in patients with liver disease. Dose adjustment of Olmezest CH 20 Tablet may be needed. Please consult your doctor.<br/>Use of Olmezest CH 20 Tablet is not recommended in patients with severe 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. Take it in the morning so that passing urine does not disturb your sleep. Your doctor will check your salts and kidney function with blood tests — do not skip them. Report muscle cramps, marked weakness, confusion or an irregular heartbeat; these can be signs your potassium or sodium has fallen. In hot weather or during an illness with vomiting or loose motions, tell your doctor — you may become dehydrated quickly.

Do not take Olmezest Ch 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. Not for people who are unable to pass urine, or who are severely dehydrated.

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. Anti-inflammatory painkillers blunt the effect and can strain the kidneys. Lithium and digoxin levels are affected; tell your doctor if you take either. Potassium-sparing types must not be combined with potassium supplements without supervision.

How to store Olmezest Ch 20

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

Expert advice for Olmezest Ch 20

<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>You have been prescribed Olmezest CH 20 Tablet for the treatment of high blood pressure.</li> <li><div>It can be taken with or without food.</div></li> <li><div>Olmezest CH 20 Tablet may cause dehydration. Drink plenty of fluids and inform your doctor if you develop extreme thirst, muscle weakness or very dry mouth.</div></li> <li>It may cause dizziness. Get up slowly when rising from a sitting or lying position. </li> <li>Use of Olmezest CH 20 Tablet during pregnancy or breastfeeding is unsafe.</li> <li>It may also decrease the risk of stroke and heart attacks.</li></ul></div></div></div></div></div></div>

Manufacturer and class

Manufacturer:
SUN PHARMA
Therapeutic class:
Anti-hypertensive and Diuretic
Drug class:
Angiotensin receptor blocker / ACE inhibitor and Water tablet

Substitutes for Olmezest Ch 20

Medicines with the same active ingredient (Olmesartan (20mg) + Chlorthalidone (12.5mg)). Ask your doctor or pharmacist before switching brands.

MedicinePackPricevs Olmezest Ch 20
Olmetop 20 CtElbrit LIfe Sciences15`S₹1693% more
Ctd O 12.5/20IPCA LABORATORIES LTD`10`S₹1768% more
Olmesar Ch 20Macleods Pharmaceuticals Pvt Ltd15`S₹23544% more
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Olmezest Ch 20 FAQs

What is Olmezest Ch 20 used for?
Olmezest Ch 20 is commonly used for Olmezest CH 20 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 Olmezest Ch 20?
Olmezest Ch 20 contains Olmesartan (20mg) + Chlorthalidone (12.5mg). 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 Olmezest Ch 20?
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 Olmezest Ch 20 work?
Olmezest CH 20 Tablet is a combination of two medicines: Olmesartan and chlorthalidone which lower blood pressure effectively.
Is Olmezest Ch 20 a prescription medicine?
Yes. Olmezest Ch 20 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 Olmezest Ch 20?
The side effects reported most often with Olmezest Ch are Nausea Taste change Diarrhea Stomach upset Weakness Headache Dizziness Increased blood uric acid Increased blood lipid level Electrolyte imbalance Glucose intolerance Decreased blood pressure. 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 Olmezest Ch 20 be taken during pregnancy?
Olmezest CH 20 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... Always tell your doctor if you are pregnant, planning a pregnancy or breastfeeding before starting Olmezest Ch.
Can I drink alcohol while taking Olmezest Ch 20?
Taking Chlorthalidone with alcohol may have additive effects in lowering your blood pressure.
What if I miss a dose of Olmezest Ch 20?
Take it as soon as you remember.
Is Olmezest Ch 20 habit forming?
No. Olmezest Ch 20 is not known to be habit forming when taken as prescribed.
How much does Olmezest Ch 20 cost on PingMeDoc Pharmacy?
Olmezest Ch 20 starts at ₹163 on PingMeDoc Pharmacy. Available in NA 10`S. Final price is confirmed at checkout and may vary by variant and location.
Who manufactures Olmezest Ch 20?
Olmezest Ch 20 is manufactured by SUN PHARMA. PingMeDoc Pharmacy sources medicines only from licensed manufacturers and distributors.
How is Olmezest Ch 20 delivered?
Olmezest Ch 20 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.

Olmezest Ch 20, Quick facts

Salt
Olmesartan (20mg) + Chlorthalidone (12.5mg)
Best price
₹163
Prescription
Required (Rx)
Schedule
Schedule H
Brand
SUN PHARMA
Manufacturer
SUN PHARMA
Therapeutic class
Anti-hypertensive and Diuretic
Drug class
Angiotensin receptor blocker / ACE inhibitor and Water tablet
Habit forming
No
Variants
NA 10`S
Delivery
Standard across India

References

The information on Olmezest Ch 20 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 Olmezest Ch 20.
  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.