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Fent 50mcg Injection

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Product introduction

Fent 50mcg Injection is a pain-relieving medicine. It is used to treat moderate to severe pain. It is also used as an anesthetic agent for short surgical procedures. This medicine should not be used in mild pain.

Fent 50mcg Injection is administered by a healthcare professional. You should not self-administer this medicine at home. The dose will depend on what you are taking it for and how well it helps your symptoms.

The most common side effects of this medicine include muscle rigidity, nausea, and vomiting. You may also experience other common side effects such as dizziness, sleepiness, increased or decreased blood pressure, and irregular heartbeat. If any of these side effects persist or get worse, you should let your doctor know. Your doctor may be able to suggest ways of preventing or reducing the symptoms.

Before using it, you should let your doctor know if you have respiratory disorders, heart diseases, high blood pressure, and liver or kidney disease. Let your doctor also know about all the other medicines you are taking because they may affect, or be affected by, this medicine. Pregnant and breastfeeding women should consult their doctors before using the medicine.

Uses of Fent Injection

Benefits of Fent Injection

In Pain relief

Fent 50mcg Injection helps to relieve moderate to severe pain in conditions that affect joints and muscles. It works by blocking chemical messengers in the brain that tell us we have pain. It can help relieve pain in conditions like rheumatoid arthritis and osteoarthritis.
It is given as an injection by a doctor or nurse and should not be self-administered. The dose and duration will be decided by the doctor depending on the condition you are being treated for. This will help you to go about your daily activities more easily and have a better, more active, quality of life.

Side effects of Fent Injection

Most side effects do not require any medical attention and disappear as your body adjusts to the medicine. Consult your doctor if they persist or if you’re worried about them

Common side effects of Fent

  • Muscle rigidity
  • Irregular heartbeats
  • Dizziness
  • Vomiting
  • Nausea
  • Drowsiness
  • Application site redness
  • Respiratory depression
  • Rigidity

How to use Fent Injection

Your doctor or nurse will give you this medicine. Kindly do not self administer.

How Fent Injection works

Fent 50mcg Injection is an opoid analgesic (pain reliever) which works by blocking transmission of pain signals to the brain to lower pain perception.

Safety advice

Fent 50mcg Injection may cause excessive drowsiness with alcohol.
Fent 50mcg Injection may be unsafe to use during pregnancy. Although there are limited studies in humans, animal studies have shown harmful effects on the developing baby. Your doctor will weigh the benefits and any potential risks before prescribing it to you. Please consult your doctor.
Breast feeding
Fent 50mcg Injection is probably unsafe to use during breastfeeding. Limited human data suggests that the drug may pass into the breastmilk and harm the baby.
Consult a doctor immediately if the baby shows signs of increased sleepiness (more than usual), difficulty breastfeeding, breathing problems, or limpness.
Fent 50mcg Injection may cause side effects which could affect your ability to drive.
Fent 50mcg Injection should be used with caution in patients with kidney disease. Dose adjustment of Fent 50mcg Injection may be needed. Please consult your doctor.
Caution should be excercised in patients with underlying kidney disease.
Fent 50mcg Injection should be used with caution in patients with severe liver disease. Dose adjustment of Fent 50mcg Injection may be needed. Please consult your doctor.

What if you forget to take Fent Injection?

If you miss a dose of Fent 50mcg Injection, consult your doctor.

All substitutes

For informational purposes only. Consult a doctor before taking any medicines.
Fent 50mcg Injection
Trofentyl 50mcg Injection
Troikaa Pharmaceuticals Ltd
9% cheaper
Fenstud 50mcg Injection
Rusan Pharma Ltd
5% cheaper
Themifent 50mcg Injection
Themis Medicare Ltd
84% costlier
Trofentyl 50mcg Injection
Troikaa Pharmaceuticals Ltd
166% costlier
Verfen Injection
Verve Healthcare Ltd
377% costlier

Quick tips

  • Fent 50mcg Injection helps provide pain relief during surgery.
  • It is given by an injection or drip into a vein.
  • It may cause dizziness, sleepiness, and headaches. Do not drive or do anything requiring concentration until you know how it affects you.
  • Do not drink alcohol or take other medicines that can cause drowsiness while taking Fent 50mcg Injection.
  • Your doctor may monitor your breathing, blood pressure and heart rate while you receive this medication.
  • Inform your doctor if you have ever been diagnosed with kidney or liver problems.

Fact Box

Chemical Class
Phenylpiperidine Derivatives
Habit Forming
Therapeutic Class
Action Class

Interaction with drugs

Taking Fent with any of the following medicines can modify the effect of either of them and cause some undesirable side effects
Brand(s): Lizolan, Lidoford, Zenlid
Brand(s): Trima, Rimarex, Morex
Brand(s): Rasalect, Relgin, Rasipar
Brand(s): Selgelin

Patient concerns

I have fent white birth mark on chick how remove it
Dr. Aanchal Maheshwari
birth marks can not be removed.
My bilirubin direct is 0.42 what can i do. Im suffer this problem to chilledhood eye are fent yellow and cloths
Dr. Ankit Soni
Please consult a good Gastroenterologist

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Tata 1mg's sole intention is to ensure that its consumers get information that is expert-reviewed, accurate and trustworthy. However, the information contained herein should NOT be used as a substitute for the advice of a qualified physician. The information provided here is for informational purposes only. This may not cover everything about particular health conditions, lab tests, medicines, all possible side effects, drug interactions, warnings, alerts, etc. Please consult your doctor and discuss all your queries related to any disease or medicine. We intend to support, not replace, the doctor-patient relationship.


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  2. Yaksh TL, WallaceIn MS. Opioids, Analgesia, and Pain Management. In: Brunton LL, Chabner BA, Knollmann BC, editors. Goodman & Gilman’s: The Pharmacological Basis of Therapeutics. 12th ed. New York, New York: McGraw-Hill Medical; 2011. pp. 505-506.
  3. Briggs GG, Freeman RK, editors. A Reference Guide to Fetal and Neonatal Risk: Drugs in Pregnancy and Lactation. 10th ed. Philadelphia, PA: Wolters Kluwer Health; 2015. pp. 539-41.
  4. Fentanyl. Gloucester Business Park Gloucester: Hameln Pharmaceuticals Ltd.; 10 Jan. 2011 [revised 28 Oct. 2018]. [Accessed 02 Apr. 2019] (online) Available from:External Link
  5. Chaves RG, Lamounier JA. Breastfeeding and maternal medications. J Pediatr (Rio J). 2004;80(5 Suppl):S189-S198. [Accessed 02 Apr. 2019] (online) Available from:External Link
  6. Central Drugs Standard Control Organisation (CDSCO). [Accessed 02 Apr. 2019] (online) Available from:External Link

Manufacturer/Marketer address

140, Damji Samji Industrial Complex, Mahakali Caves Rd., Andheri(East), Mumbai-93.
We do not facilitate sale of this product at present


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