Note: This document contains side effect information about phenylephrine nasal. Some dosage forms listed on this page may not apply to the brand name Neo-Synephrine Mild Nasal.

Applies to phenylephrine nasal: nasal solution, nasal spray.

Serious side effects

Along with its needed effects, phenylephrine nasal (the active ingredient contained in Neo-Synephrine Mild Nasal) may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.

Check with your doctor as soon as possible if any of the following side effects occur while taking phenylephrine nasal:

Symptoms of too much medicine being absorbed into the body

Note: The above side effects are more likely to occur in children because there is a greater chance that too much of this medicine may be absorbed into the body.

• Fast, irregular, or pounding heartbeat
• headache or dizziness
• increased sweating
• nervousness
• paleness
• trembling
• trouble in sleeping

• Increase in runny or stuffy nose

Other side effects

Some side effects of phenylephrine nasal may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects.

Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:

• Burning, dryness, or stinging of inside of nose