About phenylephrine hcl
Ophthalmic alpha-1 adrenergic agonist
Used for
- Widens the pupil for eye examinations or procedures
- Reduces redness from minor eye irritation
Usual adult dose
For pupil dilation, clinicians commonly apply one drop; repeat once after 5–10 minutes if needed. Redness dosing varies by product.
Usual dose in children
For pupil dilation, clinicians use lower concentrations in children; this product is generally avoided in infants and young children.
Common side effects
- Temporary burning or stinging
- Blurred vision and light sensitivity
- Eye irritation or redness
- Rarely, increased blood pressure or abnormal heartbeat
Important warnings
- May cause serious cardiovascular effects, especially in people with heart disease or high blood pressure
- Use caution with hyperthyroidism, diabetes, or older age
- Can trigger acute angle-closure glaucoma in susceptible eyes
- Avoid touching the dropper tip to the eye or other surfaces
Pregnancy
Eye use usually causes limited absorption, but safety information is limited; use only when clinically necessary.
Breastfeeding
Limited absorption is expected, but evidence is limited; avoid excess dosing and wipe away drainage.
Interactions
- Monoamine oxidase inhibitors may increase blood pressure effects
- Tricyclic antidepressants may enhance cardiovascular effects
- Other medicines that raise blood pressure may increase risk
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 It may be incomplete or out of date.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.