Phenylephrine
Phenylephrine is a nasal decongestant found in 8 medicines sold in India, such as Sinarest, Cheston Cold, Anovate. Below: what it is for, how it works, how to take it, side effects, interactions and pregnancy advice.
What it is used for
Shrinks swollen blood vessels in the nose to relieve a blocked or runny nose.
How it works
It narrows swollen blood vessels in the nose lining, which reduces congestion. Taken by mouth it is less effective than as a spray.
How to take it
Take the combination tablet or syrup as directed on the pack, usually every 4 to 6 hours. Do not use for more than about 7 days.
Common side effects
- Restlessness
- Headache
- Trouble sleeping
- Raised blood pressure
Get medical help straight away if
- Severe headache, fast or irregular heartbeat
- Difficulty passing urine
Be careful
Can raise blood pressure and heart rate; caution with high BP, heart disease or thyroid problems.
Other medicines and interactions
Avoid with MAOI antidepressants and other decongestants. Can raise blood pressure and counteract blood pressure medicines; take care with beta blockers.
Pregnancy and breastfeeding
Best avoided in pregnancy, especially the first three months, and while breastfeeding; ask a pharmacist for alternatives such as saline drops.
Combination medicines that contain Phenylephrine (8)
Common questions
What is Phenylephrine used for?
Shrinks swollen blood vessels in the nose to relieve a blocked or runny nose.
How does Phenylephrine work?
It narrows swollen blood vessels in the nose lining, which reduces congestion. Taken by mouth it is less effective than as a spray.
How should I take Phenylephrine?
Take the combination tablet or syrup as directed on the pack, usually every 4 to 6 hours. Do not use for more than about 7 days.
What are the side effects of Phenylephrine?
Common: Restlessness, headache, trouble sleeping, raised blood pressure. Get help straight away for: Severe headache, fast or irregular heartbeat, difficulty passing urine.
Does Phenylephrine interact with other medicines?
Avoid with MAOI antidepressants and other decongestants. Can raise blood pressure and counteract blood pressure medicines; take care with beta blockers.
Is Phenylephrine safe in pregnancy and breastfeeding?
Best avoided in pregnancy, especially the first three months, and while breastfeeding; ask a pharmacist for alternatives such as saline drops.
Does Phenylephrine 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 Phenylephrine?
Alex Syrup, Anovate, Cheston Cold, D Cold Total, Febrex Plus, Sinarest, Vicks Action 500 Advanced, Wikoryl.
Sources and further reading
- Phenylephrine: 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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