Tropisetron (Dosage)

Tropisetron is an antiemetic drug whose efficacy may be influenced by CYP2D6 activity. Genetic variability in this gene can modify drug clearance and contribute to differences in therapeutic response.

Tropisetron is a medication used primarily for the prevention and treatment of nausea and vomiting associated with chemotherapy treatments and surgical procedures. It belongs to the group of selective serotonin 5-HT3 receptor antagonists.

It acts by blocking the 5-HT3 serotonin receptors located in the gastrointestinal tract and central nervous system, reducing the activation of the pathways responsible for the vomiting reflex.

The response to treatment may vary between individuals due to clinical and genetic factors. Among the genetic factors studied, CYP2D6, a liver enzyme involved in the metabolism of tropisetron, stands out.

Side effects

• Headache
• Dizziness
• Constipation
• Fatigue
• Abdominal pain
• Gastrointestinal disturbances
• Hot flashes

Precautions

Tropisetron generally has good tolerability, although it should be used with caution in patients with cardiovascular risk factors due to the possibility of QT interval prolongation. CYP2D6 activity can modify the elimination rate of the drug. Ultra-rapid metabolizers may have lower exposure and a possible reduction in efficacy.

Drug interactions

CYP2D6 inhibitors can reduce the metabolism of tropisetron and increase its plasma concentrations. Co-administration with drugs that prolong the QT interval should be monitored.

Brand names

• Navoban®
• Tropisetron Teva®
• Tropisetron Mylan®