Oseltamivir Side Effects
What should I watch for?
Visit your doctor or health care professional for regular check ups. Tell your doctor if your symptoms do not start to get better or if they get worse.
If you have the flu, you may be at an increased risk of developing seizures, confusion, or abnormal behavior. This occurs early in the illness, and more frequently in children and teens. These events are not common, but may result in accidental injury to the patient. Families and caregivers of patients should watch for signs of unusual behavior and contact a doctor or health care professional right away if the patient shows signs of unusual behavior.
Common and Rare Side Effects
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:
Abdominal or stomach cramps or tenderness
arm, back, or jaw pain
chest pain or discomfort
diarrhea, watery and severe, which may also be bloody
fast or irregular heartbeat
shortness of breath
unusual weight loss
Incidence not known
Blistering, peeling, or loosening of the skin
difficulty with swallowing
fast, slow, or irregular heartbeat
hives or welts
itching, puffiness, or swelling of the eyelids or around the eyes, face, lips, or tongue
joint or muscle pain
loss of bladder control
loss of consciousness
muscle spasm or jerking of all extremities
red skin lesions, often with a purple center
red, irritated eyes
skin rash or itching over the entire body
sores, ulcers, or white spots in the mouth or on the lips
upper right abdominal or stomach pain
yellow eyes and skin
Some side effects 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:
Abdominal or stomach pain
bloody nose or unexplained nosebleeds (occurs mainly in children)
burning, dry, or itching eyes (mainly in children)
ear disorder (occurs mainly in children)
excessive tearing of the eyes (mainly in children)
redness, pain, or swelling of the eye or eyelid (mainly in children)
trouble with sleeping
unusual bleeding or bruising
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.