Kytril Side Effects
Generic Name: granisetron
Note: This page contains information about the side effects of granisetron. Some of the dosage forms included on this document may not apply to the brand name Kytril.
Not all side effects for Kytril may be reported. You should always consult a doctor or healthcare professional for medical advice. Side effects can be reported to the FDA here.
For the Consumer
Applies to granisetron: intravenous solution
Other dosage forms:
In addition to its needed effects, some unwanted effects may be caused by granisetron (the active ingredient contained in Kytril). In the event that any of these side effects do occur, they may require medical attention.
If any of the following side effects occur while taking granisetron, check with your doctor or nurse immediately:Less common
- Blurred vision
- pounding in the ears
- slow or fast heartbeat
- Arm, back, or jaw pain
- chest pain or discomfort
- chest tightness or heaviness
- dizziness, faintness, or lightheadedness when getting up suddenly from a lying or sitting position
- irregular heartbeat
- shortness of breath
- skin rash, hives, and itching
Some of the side effects that can occur with granisetron may not need medical attention. As your body adjusts to the medicine during treatment these side effects may go away. Your health care professional may also be able to tell you about ways to reduce or prevent some of these side effects. If any of the following side effects continue, are bothersome or if you have any questions about them, check with your health care professional:More common
- Abdominal or stomach pain
- difficulty having a bowel movement (stool)
- lack or loss of strength
- unusual tiredness or weakness
- sleepiness or unusual drowsiness
- sour stomach
- trouble with sleeping
- unusual taste in the mouth
For Healthcare Professionals
Applies to granisetron: intravenous solution, oral solution, oral tablet, transdermal film extended release
Nervous system side effects have been reported the most frequently. These have included headache (up to 15% to 52.2%), dizziness (5% to 26.1%), insomnia (5%), anxiety (2%), somnolence (1%), asthenia, agitation, and stimulation. Headache (0.7%) has been reported in patients using the granisetron (the active ingredient contained in Kytril) transdermal system. One case compatible with, but not diagnostic of, extrapyramidal symptoms has been reported.
Granisetron-induced headache is generally mild. In clinical trials, headache typically resolved spontaneously or was relieved by analgesics.
Gastrointestinal side effects have included nausea (20%), constipation (3% to 50%), vomiting (12%), diarrhea (4% to 9%), abdominal pain (4% to 6%), dyspepsia (4% to 6%), flatulence, dry mouth, and taste disturbances. Constipation (5.4%) has been reported in patients using the granisetron (the active ingredient contained in Kytril) transdermal system.
Constipation appears to be dose related. In dose-finding studies, constipation occurred in up to 50% of patients treated with single doses of granisetron 300 mcg/kg. If necessary, constipation may be alleviated by the use of laxatives.
Hepatic side effects have been reported rarely. These have included elevations in serum transaminases (two times normal values). Causality is unknown. Acute pancreatitis has also been reported.
Cardiovascular side effects have included hypertension in 1% of patients. Atrial fibrillation, angina pectoris, and syncope have been reported rarely. Hypotension, sinus bradycardia, A-V block, ventricular ectopy, QT prolongation, and ECG changes have been reported as well, although causality is unknown.
Results of a review of the cardiovascular effects of the drug class 5-hydroxytryptamine 3 receptor antagonists in the literature reported that electrocardiographic (ECG) changes were so small to be considered clinically insignificant. ECG changes were most noticeable between 1 to 2 hours after a dose of granisetron and returned to baseline within 24 hours. To date, no serious cardiac side effects (including torsades de pointes) triggered by ECG interval changes have been connected with the use of 5-HT 3 receptor antagonists.
Hypersensitivity side effects have been reported rarely. These have included skin rashes, facial flushing, anaphylactoid reactions, shortness of breath, hypotension, and urticaria. One report suggests hypersensitivity reactions with 5-HT 3-antagonists may be a class effect and cross-reactive.
Other side effects including asthenia (5% to 18%) and fever (up to 8%) have been reported.
More about Kytril (granisetron)
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