Along with its needed effects, a medicine 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 immediately if any of the following side effects occur:
Incidence not known
Abdominal or stomach cramps
body aches
convulsions
diarrhea
difficult or troubled breathing
excessive crying
fast, pounding, or irregular heartbeat or pulse
fever
goosebumps
increased or excessive unconscious or jerking movements
irregular, fast or slow, or shallow breathing
irritability
nausea or vomiting
nervousness
pale or blue lips, fingernails, or skin
restlessness
runny nose
shivering
sneezing
sweating
trembling
weakness
yawning
Other side effects not listed may also occur in some patients. If you notice any other effects, check with your healthcare professional.
Call your doctor for medical advice about side effects. You may report side effects to the FDA at 1-800-FDA-1088.
 Narcan Nasal Spray side effects (more detail)
