OTC · No prescriptionAntibiotic (Antitubercular)

Rifigon 400MG Tab — Side Effects & Warnings

Known side effects of Rifigon 400MG Tab include Nausea, vomiting, abdominal pain, diarrhoea, loss of appetite, headache, dizziness, tiredness, rash/itching, flu-like symptoms, orange-red discoloration of urine/tears/sweat, increased liver enzymes. Not everyone experiences these side effects.

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

Common Side Effects

Nausea
vomiting
abdominal pain
diarrhoea
loss of appetite
headache
dizziness
tiredness
rash/itching
flu-like symptoms
orange-red discoloration of urine/tears/sweat
increased liver enzymes

This is not an exhaustive list. Consult your doctor if you notice any unusual symptoms.

Important Warnings

Prescription-only anti-tubercular medicine. Risk of liver toxicity—use caution in liver disease, alcoholism, elderly, or when used with other hepatotoxic drugs; monitor liver function. May cause severe allergic reactions, thrombocytopenia or kidney problems rarely—seek medical help for unusual bleeding/bruising, severe rash, jaundice, dark urine, persistent vomiting or abdominal pain. Can stain soft contact lenses due to orange-red body fluid discoloration. Adherence is critical in TB to prevent resistance.

Drug Interactions

Rifigon 400MG Tab may interact with the following:

Strong enzyme inducer—reduces effect of oral contraceptives
warfarin/acenocoumarol
many antiretrovirals (protease inhibitors
some NNRTIs)
azole antifungals (ketoconazole/itraconazole)
macrolides
doxycycline
corticosteroids
antidiabetics (sulfonylureas)
anticonvulsants (phenytoin)
digoxin
cyclosporine/tacrolimus
statins
benzodiazepines; increased liver risk with isoniazid and alcohol

Always tell your doctor about all medicines you are taking, including over-the-counter drugs and supplements.

Pregnancy Safety

Use with caution / Consult doctor

Alcohol Interaction

Avoid

Habit Forming

Storage

Store below 25°C in a dry place, protected from light and moisture. Keep in original blister pack and out of reach of children.

Rifigon 400MG Tab — Safety Summary

Composition: Rifampicin 400 mg tablet
Prescription: Not required (OTC)
Pregnancy: Use with caution / Consult doctor
Alcohol: Avoid
Habit forming: No

Rifigon 400MG Tab — Safety FAQs

What should I do if I experience side effects?

Mild side effects often resolve on their own. If side effects are severe or persistent, stop the medicine and consult your doctor immediately.

Are all listed side effects common?

No. Some side effects are common while others are rare. Not everyone experiences side effects. Consult your doctor if you are concerned.

Can I take this medicine with other drugs?

Some medicines interact with each other. Always inform your doctor about all medicines you are currently taking.

When should I seek emergency help?

Seek immediate medical attention if you experience severe allergic reactions (difficulty breathing, swelling of face/throat), chest pain, or any life-threatening symptoms.

Get help from a doctor

Consult a doctor

Discuss side effects with a qualified doctor online.

View all medicines

Full product details for Rifigon 400MG Tab.

Lab tests

Book tests to monitor your health while on medication.

Sick leave certificate

Unwell and need rest? A doctor can issue a leave certificate online, from ₹499.

Safety disclaimer

This information is for educational purposes only and is not a substitute for professional medical advice. If you experience severe side effects, seek medical attention immediately.

Rifigon 400MG Tab — Side Effects & Warnings

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