The following side effects may get better over time as your body gets used to the medication. Let your healthcare provider know immediately if you continue to experience these symptoms or if they worsen over time.
Common Side Effects
- Headache (20%)
- Weakness or lack of energy (18%)
- Constipation (14%)
- Diarrhea (9%)
- Upset stomach and stomach pain (4—6%)
Less Common Side Effects
- Dizziness
- Trouble sleeping (insomnia)
- Anxiety
Granisetron serious side effects
Contact your healthcare provider immediately if you experience any of the following.
- Serotonin syndrome: Confusion, fever, fast heart rate, sweating, muscle stiffness or spasms
Source: DailyMed
The following Granisetron side effects have also been reported
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:
More common
Severe constipation
Incidence not known
arm, back, or jaw pain
black, tarry stools
bleeding gums
blood in the urine or stools
blurred vision
chest pain or discomfort
chest tightness or heaviness
chills
confusion
difficulty with swallowing
dizziness
dizziness, faintness, or lightheadedness when getting up suddenly from a lying or sitting position
fainting
fast, slow, or irregular heartbeat
headache
hives or welts, itching, or skin rash
muscle spasms or twitching
nervousness
painful or difficult urination
pain, itching, redness, irritation, blistering, burning, discoloration, or rash where the patch is applied
pale skin
pinpoint red spots on the skin
pounding in the ears
puffiness or swelling of the eyelids or around the eyes, face, lips, or tongue
redness of the skin
restlessness
seeing, hearing, or feeling things that are not there
sleepiness or unusual drowsiness
sores, ulcers, or white spots on the lips or in the mouth
stomach pain or swelling
sweating
swollen glands
trouble breathing
unusual bleeding or bruising
unusual tiredness or weakness
vomiting
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:
Incidence not known
Decreased appetite
hair loss or thinning of the hair
lack or loss of strength
trouble sleeping
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.
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