Skip to Content

Asthmanefrin Side Effects

Generic Name: racepinephrine

Note: This document contains side effect information about racepinephrine. Some of the dosage forms listed on this page may not apply to the brand name Asthmanefrin.

For the Consumer

Applies to racepinephrine: inhalation solution

Get emergency medical help if you have signs of an allergic reaction: hives; difficult breathing; swelling of your face, lips, tongue, or throat.

Call your doctor at once if you have:

  • new or worsening asthma symptoms;

  • fast heart rate, tremors or a nervous feeling;

  • sleep problems (insomnia);

  • a seizure (convulsions); or

  • dangerously high blood pressure--severe headache, blurred vision, pounding in your neck or ears, nosebleed, anxiety, confusion, severe chest pain, shortness of breath, irregular heartbeats.

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects.

For Healthcare Professionals

Applies to racepinephrine: inhalation solution


Frequency not reported: Increased blood pressure, increase heart rate[Ref]

Nervous system

Frequency not reported: Tremors, nervousness, seizure, difficulty sleeping[Ref]


Frequency not reported: Worsening asthma[Ref]


1. "Product Information. S2 Inhalant (racepinephrine)." Nephron Pharmaceuticals, Orlando, FL.

2. "Product Information. Asthmanefrin (racepinephrine)." Nephron Pharmaceuticals, Orlando, FL.

Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.

Some side effects may not be reported. You may report them to the FDA.

More about Asthmanefrin (racepinephrine)

Consumer resources

Other brands: S2 Inhalant

Related treatment guides