B Fen 20mg Tablet ER is a muscle relaxer. It is used to treat muscular symptoms such as rigidity, tension, and stiffness that may occur due to various conditions such as cerebral palsy, multiple sclerosis, motor neuron disease, or injury to the head, brain, or spine.

B Fen 20mg Tablet ER can be taken with food. In general, you should try to use the smallest amount necessary to control your symptoms, for the shortest possible time. You should take this medicine regularly while you need it. Try not to miss doses as this will make the medicine less effective.

Some common side effects of this medicine include fatigue, weakness, drowsiness, and dizziness. If any of these side effects do not go away or get worse, you should let your doctor know. Your doctor may be able to suggest ways of preventing or reducing the symptoms.

To make sure it is safe for you, before taking this medicine, let your doctor know if you have any medical conditions or disorders. You should also tell your doctor all the other medicines you are using or taking. Pregnant and breastfeeding women should consult their doctors before using this medicine.

Uses of B Fen Tablet ER

Muscle relaxation

Benefits of B Fen Tablet ER

In Muscle relaxation

B Fen 20mg Tablet ER is a muscle relaxant that is used to relieve rigidity, inflammation, and swelling in conditions that affect skeletal muscles. It works by blocking chemical messengers in the brain that are responsible for such symptoms. It effectively relieves muscle stiffness or spasm, thereby improving muscle movement.

Take it as it is prescribed to get the most benefit. Do not take more or for longer than needed as that can be dangerous. In general, you should take the lowest dose that works, for the shortest possible time. This will help you to go about your daily activities more easily and have a better, more active, quality of life.

Side effects of B Fen Tablet ER

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 B Fen

Dizziness
Convulsion
Nausea
Headache
Sedation
Hypotension (low blood pressure)
Hypotonia (decreased muscle tone)
Agitation
Constipation
Increased white blood cell count
Chills
Urinary retention

How to use B Fen Tablet ER

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. B Fen 20mg Tablet ER is to be taken with food.

How B Fen Tablet ER works

B Fen 20mg Tablet ER is a muscle relaxant. It works on the brain and spinal cord to relieve muscle stiffness or spasm maintaining the strength of the muscles. This relieves pain and improves movement of muscles.

Safety advice

Alcohol

UNSAFE

B Fen 20mg Tablet ER may cause excessive drowsiness with alcohol.

Pregnancy

CONSULT YOUR DOCTOR

B Fen 20mg Tablet ER 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

SAFE IF PRESCRIBED

B Fen 20mg Tablet ER is safe to use during breastfeeding. Human studies suggest that the drug does not pass into the breastmilk in a significant amount and is not harmful to the baby.

Driving

UNSAFE

B Fen 20mg Tablet ER may decrease alertness, affect your vision or make you feel sleepy and dizzy. Do not drive if these symptoms occur.

Kidney

CAUTION

B Fen 20mg Tablet ER should be used with caution in patients with kidney disease. Dose adjustment of B Fen 20mg Tablet ER may be needed. Please consult your doctor.

Liver

CAUTION

B Fen 20mg Tablet ER should be used with caution in patients with liver disease. Dose adjustment of B Fen 20mg Tablet ER may be needed. Please consult your doctor.

What if you forget to take B Fen Tablet ER?

If you miss a dose of B Fen 20mg Tablet ER, take it as soon as possible. However, if it is almost time for your next dose, skip the missed dose and go back to your regular schedule. Do not double the dose.

All substitutes

For informational purposes only. Consult a doctor before taking any medicines.

B Fen 20mg Tablet ER

₹14.6/Tablet ER

Bizlo OD Tablet ER

Torrent Pharmaceuticals Ltd

₹17.09/tablet er

17% costlier

Baclof OD 20 Tablet ER

Intas Pharmaceuticals Ltd

₹17/tablet er

16% costlier

Alcofen XL 20 Tablet

Hind Bioscience

₹28.1/tablet er

92% costlier

Bacrite 20 XR Tablet

Health N U Therapeutics Pvt Ltd

₹16.2/tablet er

11% costlier

Gleefen 20mg Tablet ER

Sigmund Promedica

₹26.6/tablet er

82% costlier

View all substitutes

Quick tips

B Fen 20mg Tablet ER provides relief from rigidity, tension and stiffness in muscles (spasticity) that may occur due to various conditions affecting the nervous system.
B Fen 20mg Tablet ER should be taken during meals with a little liquid.
B Fen 20mg Tablet ER may cause dizziness or sleepiness. Do not drive or do anything requiring concentration until you know how it affects you.
Avoid consuming alcohol when taking B Fen 20mg Tablet ER as it may cause excessive drowsiness.
Inform your doctor if you are pregnant, planning to conceive or breastfeeding.
Do not stop taking it suddenly without talking to your doctor if you've been on it for a long time.

Fact Box

Chemical Class

Gamma Amino Acids Derivative

Habit Forming

Therapeutic Class

PAIN ANALGESICS

Action Class

Skeletal muscle relaxant- Centrally acting

Interaction with drugs

Taking B Fen with any of the following medicines can modify the effect of either of them and cause some undesirable side effects

Trihexyphenidyl (Oral Route) Moderate

Concurrent use may cause dry mouth, blurred vision, urinary retention, constipation, and confusion. Talk to your doctor if you notice any unusual symptoms.

Tramadol (Oral Route) Moderate

Concurrent use may make you feel more drowsy and increase the risk of serious breathing problems. If concurrent use is essential, your doctor may monitor your respiratory and card... More

Alfuzosin (Oral Route) Moderate

Concurrent use may cause low blood pressure. If concurrent use is essential, watch out for symptoms such as dizziness, fainting, blurred vision, nausea, fatigue, confusion, cold o... More

Amlodipine (Oral Route) Moderate

Concurrent use may cause low blood pressure. If concurrent use is essential, watch out for symptoms such as dizziness, fainting, blurred vision, nausea, fatigue, confusion, cold o... More

Atenolol (Oral Route) Moderate

Concurrent use may cause low blood pressure. If concurrent use is essential, watch out for symptoms such as dizziness, fainting, blurred vision, nausea, fatigue, confusion, cold o... More

View all drug interactions

Patient concerns

healty but no muscle growth properly

Dr. Pushkar Mani

Physician

CBC, thyroid profile , VITAMIN d & b estimation, LFT ,KFT

After day long work when on bed the calf muscle start to pain

Vipul Aggarwal

please get vitamin d and b 12 checked

FAQs

Can B Fen 20mg Tablet ER make you sleepy?

Yes, B Fen 20mg Tablet ER can cause sleepiness. It can make a person dizzy due to its sedative effect. It can also affect vision and therefore you should avoid driving and using heavy machinery until and unless you know how B Fen 20mg Tablet ER affects you.

Does B Fen 20mg Tablet ER help anxiety?

Though B Fen 20mg Tablet ER is not approved to treat anxiety disorders, it has been observed in some studies that it is effective in treating stress which occurs after a trauma.

Can I take B Fen 20mg Tablet ER if I have a liver problem?

If you have a liver problem then you need to be cautious while taking B Fen 20mg Tablet ER. This is because the medicine may increase the production of liver enzymes. Hence, regular laboratory examination of liver enzymes is required while taking this medicine as advised by your doctor.

Does B Fen 20mg Tablet ER have any effect on kidneys?

B Fen 20mg Tablet ER may cause side effects in patients with normal kidney function which include excessive day time urination (pollakiuria), burning sensation while urinating (dysuria), and loss of bladder control (urinary incontinence). Generally, a lower dose of this medicine is prescribed if a person has abnormally functioning kidneys or if a person is on dialysis.

How should B Fen 20mg Tablet ER be taken?

Take B Fen 20mg Tablet ER exactly as directed by your doctor. If a person experiences nausea while taking B Fen 20mg Tablet ER then it should be consumed with food or milk. However, for night cramps, it would be best to use the medicine at night time or 1 hour before doing specific tasks like physiotherapy or washing.

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Disclaimer:

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.

References

White PF, Katzung BG. Skeletal Muscle Relaxants. In: Katzung BG, Masters SB, Trevor AJ, editors. Basic and Clinical Pharmacology. 11th ed. New Delhi, India: Tata McGraw Hill Education Private Limited; 2009. p. 463.
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. 121-23.
Baclofen. Camberley, Surrey: Novartis Pharmaceuticals UK Ltd.; 2001 [revised 22 Dec. 2017]. [Accessed 23 Jan. 2019] (online) Available from:
Drugs.com. Baclofen Pregnancy and Breastfeeding Warnings. [Accessed 02 Apr. 2019] (online) Available from:
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:
Central Drugs Standard Control Organisation (CDSCO). [Accessed 02 Apr. 2019] (online) Available from:
Baclofen [Package Leaflet]. Basel, Switzerland: Novartis Pharma AG; 2021. [Accessed 09 Jun, 2023] (online) Available from:

Marketer details

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Country of origin: India

The list of available options shown with the same composition has been prepared upon the advice of registered medical practitioners, pharmacists affiliated with TATA 1MG. TATA 1MG does not promote any pharmaceutical product of any particular company, and all recommendations are based on the medical opinion, advisories from specialist medical and pharmaceutical professionals.