Prescription requiredHaematinic / Iron supplement

Tonoferon Drops — Side Effects & Warnings

Known side effects of Tonoferon Drops include Nausea, stomach upset, abdominal pain, constipation, diarrhea, dark/black stools, metallic taste, teeth staining (with liquid iron). Not everyone experiences these side effects.

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

Common Side Effects

Nausea
stomach upset
abdominal pain
constipation
diarrhea
dark/black stools
metallic taste
teeth staining (with liquid iron)

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

Important Warnings

Use only if prescribed for infants/children; overdose of iron can be dangerous—keep out of reach of children. Use with caution in patients with iron overload (hemochromatosis/hemosiderosis), hemolytic anemia, repeated blood transfusions, active peptic ulcer/IBD. Liquid iron may stain teeth—give towards back of mouth and rinse mouth after. Seek medical help for accidental overdose or severe vomiting, abdominal pain, or blood in stools.

Drug Interactions

Tonoferon Drops may interact with the following:

Reduced absorption with antacids
calcium
dairy products; reduced absorption with tetracyclines and fluoroquinolones (separate by 2-4 hours); may reduce absorption of levothyroxine
bisphosphonates
penicillamine
methyldopa/levodopa (separate dosing).

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

Pregnancy Safety

Consult doctor

Alcohol Interaction

Use with caution

Habit Forming

Storage

Store at room temperature (below 25°C), tightly closed, protected from light and moisture. Do not freeze. Keep out of reach of children.

Tonoferon Drops — Safety Summary

Composition: Folic Acid (200u/ml) + Iron (25mg) + Lysine (200u/1g) + Vitamin B12 (5u/1g)
Prescription: Required (Rx)
Pregnancy: Consult doctor
Alcohol: Use with caution
Habit forming: No

Tonoferon Drops — 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 Tonoferon Drops.

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.