Contraindications
SUSTOL is contraindicated in patients with hypersensitivity to granisetron, any of the components of SUSTOL, or any other 5-HT3 receptor antagonist.
Warnings and Precautions
Serious or severe injection site reactions (ISRs): infection, prolonged bleeding, bruising, hematomas, nodules, pain, and tenderness have been reported. Patients who are neutropenic or receiving antiplatelet agents or anticoagulants may be at greater risk. Monitor for ISRs during treatment with SUSTOL. Inform patients that some ISRs may occur 2 weeks or more after SUSTOL administration. For ongoing ISRs, administer SUSTOL at a site away from the affected area and consider discontinuing SUSTOL for severe or persistent ISRs.
Monitor for constipation and decreased bowel activity and consider optimizing patients’ current bowel regimens used for managing preexisting constipation. Instruct patients to seek immediate medical care if signs and symptoms of ileus occur.
Hypersensitivity reactions have been reported and may occur up to 7 days or longer following SUSTOL administration and may have an extended course. If a reaction occurs, administer appropriate treatment and monitor until signs and symptoms resolve.
Serotonin syndrome has been reported with 5-HT3 receptor antagonists alone but particularly with concomitant use of serotonergic drugs.
Adverse Reactions
Most common adverse reactions (≥3%) are injection site reactions, constipation, fatigue, headache, diarrhea, abdominal pain, insomnia, dyspepsia, dizziness, asthenia, and gastroesophageal reflux.