Information about Phenylephrine

Phenylephrine Uses

Phenylephrine is used in common cold.

How Phenylephrine works

Phenylephrine is a decongestant. It works by narrowing the small blood vessels which provides temporary relief from inflammation (redness and swelling) and discomfort.
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MD Pharmacology, MBBS
Last updated
13 Jun 2023 | 11:29 AM (UTC)

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Available Medicine for Phenylephrine

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3061 variant(s)
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Expert advice for Phenylephrine

  • Oral phenylephrine should be taken with food
  • Phenylephrine can make you restless, so don't take it too close to bedtime
  • Do not use this medicine without doctor's advice if you are pregnant or breast feeding
  • Smoking may worsen the effect; therefore use of tobacco should be avoided.

Frequently asked questions for Phenylephrine


Q. Is it safe to use Phenylephrine?

Yes, Phenylephrine is safe for most of the patients. However, in some patients, it may cause side effects like nausea, vomiting, headache, fatigue, dizziness, dryness in the mouth, sleepiness and allergic reaction. If you experience any persistent problem while taking this medication, inform your doctor as soon as possible.

Q. Can the use of Phenylephrine cause dizziness?

Yes, the use of Phenylephrine can cause dizziness (feeling faint, weak, unsteady or lightheaded) in some patients. If you feel dizzy or lightheaded, it is better to rest for sometime and resume once you feel better. Do not drive or use any machines. Consult your doctor if the side effect persist or worsen.

Q. Can the use of Phenylephrine cause nausea and vomiting?

Yes, the use of Phenylephrine can cause nausea and vomiting. To avoid nausea one can take Phenylephrine with milk, food or with antacids. If vomiting occurs, drink plenty of water or other fluids. Talk to your doctor if vomiting persists. You should let your doctor know if you are unable to drink water and there are signs of dehydration, like dark colored and strong-smelling urine and a low frequency of urination. Avoid taking fatty or fried foods along with this medication. Do not take any other medicine without consulting your doctor.


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