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Prescription requiredAjanta PharmaAnalgesic and anti-inflammatory

Tapenax ER 100 mg

Tapentadol

Available at our pharmacy counter

This medicine is dispensed in person against a valid prescription and is not sold online. Ask our pharmacist about availability, or speak to a registered doctor.

In-store reference price ₹362

Tapenax ER 100 mg is used for this medicine is used in the treatment of pain, inflammation, arthritis, fever and period pain.

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

Licensed pharmacyPharmacist-verified order

Key details

Salt: Tapentadol
Available variants: 100 mg 15
Best price: ₹362
MRP: ₹381
Prescription: Required
Manufacturer: AJANTA PHARMA

Ordering notes

This medicine is dispensed in person at a licensed pharmacy counter and is not delivered.
Returns & refunds: orders can be cancelled before dispatch; after dispatch, returns depend on the item category. Read the full policy

Composition of Tapenax ER 100 mg

Tapenax ER 100 mg contains Tapentadol. It belongs to the Opioid analgesic class of medicines.

Uses of Tapenax ER 100 mg

  • This medicine is used in the treatment of pain
  • inflammation
  • arthritis
  • fever and period pain.

Key benefits

  • Relieves pain and the swelling that causes it
  • Effective in arthritis and injury

How Tapenax ER 100 mg works

Tapentadol blocks the chemicals your body makes at a site of injury or inflammation, which reduces pain, swelling and fever.

How to take Tapenax ER 100 mg

Use this medicine as your doctor has directed. Follow the dose and the duration written on your prescription.

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 dangerously slow or stop breathing — this is a medical emergency. Do not wait for symptoms to appear — go to the nearest emergency department and take the pack or strip with you.

Side effects of Tapenax ER 100 mg

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

  • Indigestion
  • Stomach pain
  • Nausea
  • Heartburn
  • Dizziness
  • Swelling of the ankles and feet
  • Constipation
  • Drowsiness
  • Sweating

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 Tapenax ER 100 mg

PregnancyNot recommended in pregnancy — it may harm the developing baby. Tell your doctor at once if you are or might be pregnant.
BreastfeedingUse with caution while breastfeeding; watch the baby for any unusual symptoms.
AlcoholDo not drink alcohol while taking this medicine.
DrivingDo not drive or operate machinery while taking this medicine.
KidneyConsult your doctor if you have kidney disease.
LiverConsult your doctor if you have liver disease.
Habit formingYes

Warnings and precautions

Take it with or just after food, and for the shortest time that works. Stop and seek urgent care for black or tarry stools, vomiting blood, or severe stomach pain — this group can cause bleeding from the stomach. Long or high-dose use raises the risk of heart attack, stroke and kidney injury, particularly in older people and those already at risk. Avoid if you are dehydrated or have an illness with vomiting or loose motions — the kidneys are vulnerable then. Must be avoided in the last three months of pregnancy. This is an opioid painkiller. It can cause dependence, and should be taken only for the period your doctor has specified. Never combine it with alcohol, sleeping tablets or other sedatives — together they can dangerously slow your breathing. Do not stop a long course abruptly; your doctor will reduce it gradually.

Do not take Tapenax ER if

Not for anyone with a known allergy to this medicine or to any ingredient in the pack. Not for people with an active stomach ulcer, severe kidney or heart failure, or asthma triggered by aspirin or anti-inflammatory painkillers. Not in the third trimester of pregnancy.

Interactions with other medicines

Combining with a blood thinner or aspirin sharply raises the bleeding risk. Reduces the effect of blood pressure medicines and water tablets, and together with them can harm the kidneys. Never take two anti-inflammatory painkillers at the same time.

How to store Tapenax ER 100 mg

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

Expert advice for Tapenax ER 100 mg

Use the lowest dose for the shortest period. If you need a painkiller regularly, see your doctor rather than continuing on your own. Paracetamol is the safer choice for simple fever and headache.

Manufacturer and class

Manufacturer:
AJANTA PHARMA
Therapeutic class:
Analgesic and anti-inflammatory
Drug class:
Opioid analgesic

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Tapenax ER 100 mg FAQs

What is Tapenax ER 100 mg used for?
Tapenax ER 100 mg is commonly used for This medicine is used in the treatment of pain, inflammation, arthritis, fever and period pain. 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 Tapenax ER 100 mg?
Tapenax ER 100 mg contains Tapentadol. 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 Tapenax ER 100 mg?
Use this medicine as your doctor has directed. Take it exactly as prescribed; do not change the dose or stop early without talking to your doctor.
How does Tapenax ER 100 mg work?
Tapentadol blocks the chemicals your body makes at a site of injury or inflammation, which reduces pain, swelling and fever.
Is Tapenax ER 100 mg a prescription medicine?
Yes. Tapenax ER 100 mg 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 Tapenax ER 100 mg?
The side effects reported most often with Tapenax ER are Indigestion, Stomach pain, Nausea, Heartburn, Dizziness. 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 Tapenax ER 100 mg be taken during pregnancy?
Not recommended in pregnancy — it may harm the developing baby. Always tell your doctor if you are pregnant, planning a pregnancy or breastfeeding before starting Tapenax ER.
Can I drink alcohol while taking Tapenax ER 100 mg?
Do not drink alcohol while taking this medicine.
What if I miss a dose of Tapenax ER 100 mg?
Take it as soon as you remember.
Is Tapenax ER 100 mg habit forming?
Yes Take Tapenax ER only as directed and for the duration your doctor advises.
How much does Tapenax ER 100 mg cost on PingMeDoc Pharmacy?
Tapenax ER 100 mg starts at ₹362 (MRP ₹381) on PingMeDoc Pharmacy. Available in 100 mg 15. Final price is confirmed at checkout and may vary by variant and location.
Who manufactures Tapenax ER 100 mg?
Tapenax ER 100 mg is manufactured by AJANTA PHARMA. PingMeDoc Pharmacy sources medicines only from licensed manufacturers and distributors.
How is Tapenax ER 100 mg delivered?
Tapenax ER 100 mg is a regulated medicine and is not delivered. It is dispensed in person at a licensed pharmacy counter against a valid prescription. Ask our pharmacist on WhatsApp about availability.

Tapenax ER 100 mg, Quick facts

Salt
Tapentadol
Best price
₹362
MRP
₹381
Prescription
Required (Rx)
Brand
AJANTA PHARMA
Manufacturer
AJANTA PHARMA
Therapeutic class
Analgesic and anti-inflammatory
Drug class
Opioid analgesic
Habit forming
Yes
Variants
100 mg 15
Delivery
Standard across India

References

The information on Tapenax ER 100 mg 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 Tapenax ER 100 mg.
  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.