What side effects may I notice from receiving Naratriptan Hydrochloride?

Side effects that you should report to your doctor or health care professional as soon as possible:

-allergic reactions like skin rash, itching or hives, swelling of the face, lips, or tongue
-changes in vision
-chest pain or chest tightness
-signs and symptoms of a dangerous change in heartbeat or heart rhythm like chest pain; dizziness; fast, irregular heartbeat; palpitations; feeling faint or lightheaded; falls; breathing problems
-signs and symptoms of a stroke like changes in vision; confusion; trouble speaking or understanding; severe headaches; sudden numbness or weakness of the face, arm or leg; trouble walking; dizziness; loss of balance or coordination
-signs and symptoms of serotonin syndrome like irritable; confusion; diarrhea; fast or irregular heartbeat; muscle twitching; stiff muscles; trouble walking; sweating; high fever; seizures; chills; vomiting

Side effects that usually do not require medical attention (report to your doctor or health care professional if they continue or are bothersome):

-diarrhea
-dizziness
-drowsiness
-headache
-nausea, vomiting
-pain, tingling, numbness in the hands or feet
-stomach pain

This list may not describe all possible side effects for Naratriptan Hydrochloride. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.