About phenylephrine hcl
Ophthalmic alpha-1 adrenergic agonist
Used for
- Widens the pupil for eye examinations or procedures.
- Helps distinguish certain causes of a red eye.
Usual adult dose
For pupil dilation, one drop; repeat once after 5–10 minutes if needed, as directed by an eye-care professional.
Usual dose in children
For pupil dilation, dosing depends on age and purpose; an eye-care professional must determine it.
Common side effects
- Temporary stinging, burning, or blurred vision
- Light sensitivity
- Headache
- Rarely, increased blood pressure or irregular heartbeat
Important warnings
- May cause serious effects if absorbed, especially in infants and people with heart or blood-vessel disease.
- Use only in the eyes; avoid touching the dropper tip.
- Pupil dilation can temporarily impair vision; avoid driving until vision clears.
- Seek urgent care for chest pain, severe headache, fainting, or a fast or irregular heartbeat.
Pregnancy
Use only when clearly needed; human pregnancy safety information is limited.
Breastfeeding
Use cautiously; safety information is limited. Press the inner eye corner after drops to reduce absorption.
Interactions
- Monoamine oxidase inhibitors and tricyclic antidepressants may increase blood-pressure effects.
- Other medicines that raise blood pressure or stimulate the heart may increase cardiovascular effects.
AI-generated from general medical knowledge, not from this product's official leaflet. It may be incomplete or out of date. Not medical advice — ask a pharmacist or doctor before making any decision.