How do you take Vit B1; Vit B2; Vit B6; Nicotinamide?

For adults, take 1 to 2 tablets daily, usually after food to avoid stomach upset. If you're using a syrup like Afrablex Syrup or Krishat B-Complex Syrup, follow the dosage on the pack, usually 1 to 2 teaspoonfuls (5-10ml) once or twice daily. Your pharmacist can advise you based on the specific brand you buy.

What are the side effects of Vit B1; Vit B2; Vit B6; Nicotinamide?

Bright yellow-coloured urine (this is normal and harmless; it's from Vitamin B2), mild stomach upset or nausea, slight headache, mild diarrhoea if taken on an empty stomach

Who should not take Vit B1; Vit B2; Vit B6; Nicotinamide?

People who are allergic to any of the B vitamins in the formulation should avoid it. People with certain rare conditions like Leber's disease (a hereditary eye problem) should consult a doctor first.

OTC

Vitamin supplement (B-Complex)

Vit B1; Vit B2; Vit B6; Nicotinamide

Q: What is Vit B1; Vit B2; Vit B6; Nicotinamide used for?

Vitamin B deficiency, tiredness and weakness, poor appetite, mouth sores (angular stomatitis), numbness or tingling in hands and feet, skin problems like pellagra, general body weakness, nerve problems

Last reviewed July 2026

Who is this for?

For adults (18+). Standard adult dosing applies: see the How to Take tab for full instructions.

What is this drug?

This is a Vitamin B-Complex supplement containing four important B vitamins (B1, B2, B6, and Nicotinamide/B3) that work together to help your body convert food into energy, support your nervous system, and keep your skin and body healthy.

How it works

# B-Complex Vitamins: Mechanism of Action **Vitamin B1 (Thiamine):** Acts as a coenzyme for pyruvate dehydrogenase and transketolase enzymes, facilitating carbohydrate metabolism and energy production in neural and muscular tissues. **Vitamin B2 (Riboflavin):** Functions as a precursor for FAD and FMN coenzymes, which are essential cofactors in the electron transport chain and oxidative-reduction reactions for cellular energy metabolism. **Vitamin B6 (Pyridoxine):** Converts to pyridoxal-5-phosphate, a critical coenz

What is it used for?

Vitamin B deficiencytiredness and weaknesspoor appetitemouth sores (angular stomatitis)numbness or tingling in hands and feetskin problems like pellagrageneral body weaknessnerve problems

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Vitamins & Supplements

Available Over The Counter

Get this from any pharmacy or chemist: no prescription needed.

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What to watch out for

Buy only from reputable pharmacies, avoiding vitamins from roadside sellers or open markets as they may be expired or fake. Don't take more than the recommended dose thinking it will work faster, as excess B vitamins are just wasted by your body and can cause side effects. If your symptoms like tiredness, numbness, or mouth sores don't improve after a few weeks, see a doctor, as there may be something else going on.

Common Side Effects

Bright yellow-coloured urine (this is normal and harmless; it's from Vitamin B2)
mild stomach upset or nausea
slight headache
mild diarrhoea if taken on an empty stomach

Serious Side Effects

Severe allergic reaction such as swelling of face
lips or difficulty breathing: go to the hospital immediately. Severe skin rash or itching all over your body: stop taking the drug and see a doctor right away.

Drug Interactions

Levodopa (a Parkinson's disease drug): Vitamin B6 can reduce its effectiveness. Phenytoin and phenobarbital (drugs for convulsions/seizures): B vitamins may affect how these drugs work in your body. Alcohol: heavy drinking reduces absorption of B vitamins, so reduce alcohol intake while taking this supplement.

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Pregnancy & Breastfeeding Warning

Generally safe during pregnancy and breastfeeding, and many pregnant women actually need B vitamins, but always consult your doctor or midwife for the right dosage before taking any supplement.

Who Should NOT Take This

People who are allergic to any of the B vitamins in the formulation should avoid it. People with certain rare conditions like Leber's disease (a hereditary eye problem) should consult a doctor first.

How to Store

Store in a cool, dry place away from direct sunlight and heat. Nigerian weather can be very hot, so don't leave it on a windowsill or inside a hot car. Keep the container tightly closed to protect from humidity, and always keep it out of the reach of children.

For information only: not medical advice. Always talk to a doctor or pharmacist before changing your medication.