Vitamin B complex
Vitamin B complex is a vitamins found in 4 medicines sold in India, such as Becosules, Neurobion Forte, Polybion. Below: what it is for, how it works, how to take it, side effects, interactions and pregnancy advice.
Also called: b complex, vitamin b
What it is used for
Supports energy, nerves, skin and blood; used for deficiency and mouth ulcers.
How it works
A mix of B vitamins (B1, B2, B3, B5, B6 and often B12 and folic acid) needed for energy, nerves and making blood.
How to take it
Usually one a day after food. Bright yellow urine is harmless (from vitamin B2).
Common side effects
- Yellow urine
- Mild nausea
Get medical help straight away if
Numbness or tingling with very high B6 over months
Be careful
Urine may turn bright yellow; this is harmless.
Other medicines and interactions
High folic acid can hide B12 deficiency. B6 in large doses reduces levodopa effect (without carbidopa).
Pregnancy and breastfeeding
Prenatal vitamins are preferred in pregnancy; ordinary doses are fine while breastfeeding.
Combination medicines that contain Vitamin B complex (4)
Common questions
What is Vitamin B complex used for?
Supports energy, nerves, skin and blood; used for deficiency and mouth ulcers.
How does Vitamin B complex work?
A mix of B vitamins (B1, B2, B3, B5, B6 and often B12 and folic acid) needed for energy, nerves and making blood.
How should I take Vitamin B complex?
Usually one a day after food. Bright yellow urine is harmless (from vitamin B2).
What are the side effects of Vitamin B complex?
Common: Yellow urine, mild nausea. Get help straight away for: Numbness or tingling with very high B6 over months.
Does Vitamin B complex interact with other medicines?
High folic acid can hide B12 deficiency. B6 in large doses reduces levodopa effect (without carbidopa).
Is Vitamin B complex safe in pregnancy and breastfeeding?
Prenatal vitamins are preferred in pregnancy; ordinary doses are fine while breastfeeding.
Does Vitamin B complex need a prescription in India?
It is usually sold without a prescription in India, but ask a pharmacist if you take other medicines or have a long-term illness.
Which brands contain Vitamin B complex?
Becosules, Cobadex CZS, Neurobion Forte, Polybion.
Sources and further reading
- Vitamin B complex: NHS · MedlinePlus
NHS (UK National Health Service) and MedlinePlus (US National Library of Medicine) are free, reviewed medicine guides. Brand names and doses there may differ from India.
Last reviewed 31 October 2026. Written by Satya Babu from standard prescribing information.
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