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- Clinician Information:
Neo-Synephrine Patient Information including If I Miss a Dose
In this Article
- What is phenylephrine ophthalmic (Neo-Synephrine)?
- What are the possible side effects of phenylephrine ophthalmic?
- What is the most important information I should know about phenylephrine ophthalmic?
- What should I discuss with my healthcare provider before using phenylephrine ophthalmic?
- How should I use phenylephrine ophthalmic?
- What happens if I miss a dose?
- What happens if I overdose?
- What should I avoid while using phenylephrine ophthalmic?
- What other drugs will affect phenylephrine ophthalmic?
- Where can I get more information?
What happens if I miss a dose?
Apply the missed dose as soon as you remember. However, if it is almost time for the next regularly scheduled dose, skip the missed dose and apply the next one as directed. Do not use a double dose of this medication.
What happens if I overdose?
An overdose of this medication is unlikely to be harmful. If you do suspect an overdose, or if the drops have been ingested (taken by mouth), contact an emergency room or poison control center for advice.
What should I avoid while using phenylephrine ophthalmic?
Use caution when driving, operating machinery, or performing other hazardous activities. Phenylephrine ophthalmic may cause blurred vision. If you experience blurred vision, avoid these activities.
Do not touch the dropper to any surface, including the eyes or hands. The dropper is sterile. If it becomes contaminated, it could cause an infection in the eye.
If you wear contact lenses, remove them before applying phenylephrine ophthalmic. Ask your doctor if contact lenses can be reinserted after application of the medication. Phenylephrine ophthalmic may contain a preservative (benzalkonium chloride), which may cause discoloration of contact lenses.
Do not use phenylephrine ophthalmic more often or continuously for longer than 48 to 72 hours without consulting a doctor. Chronic use of this medication may damage the blood vessels (veins and arteries) in the eyes. Consult a doctor if your symptoms do not improve or appear to worsen.
What other drugs will affect phenylephrine ophthalmic?
Do not use other eye medications during treatment with phenylephrine ophthalmic except under the direction of your doctor.
Although drug interactions between phenylephrine ophthalmic and drugs taken by mouth are not expected, they can occur. Before using this medication, tell your doctor if you are taking any of the following medicines:
- a monoamine oxidase inhibitor (MAOI) such as isocarboxazid (Marplan), tranylcypromine (Parnate), or phenelzine (Nardil); or
- a beta-blocker such as propranolol (Inderal), metoprolol (Lopressor, Toprol XL), or labetalol (Normodyne, Trandate).
You may not be able to use phenylephrine ophthalmic, or you may require a dosage adjustment or special monitoring during treatment if you are taking any of the medicines listed above.
Drugs other than those listed here may also interact with phenylephrine ophthalmic. Talk to your doctor and pharmacist before taking any prescription or over-the-counter medicines, including vitamins, minerals, and herbal products.
Where can I get more information?
Your pharmacist has additional information about phenylephrine ophthalmic written for health professionals that you may read.
Remember, keep this and all other medicines out of the reach of children, never share your medicines with others, and use this medication only for the indication prescribed.
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Additional Neo-Synephrine Information
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