Ondansetron Accord (Ondansetron)

Ondansetron Accord is a selective 5‑HT3 receptor antagonist used to prevent and treat nausea and vomiting in several clinical settings.

• Chemotherapy‑induced nausea and vomiting: helps control acute and delayed episodes in cancer patients.
• Radiation‑induced nausea and vomiting: reduces the frequency and severity of symptoms during radiotherapy.
• Post‑operative nausea and vomiting: decreases the incidence of nausea after surgical procedures.
• Pregnancy‑related nausea (hyperemesis gravidarum): used when other treatments are ineffective, under specialist specialist specialist specialist specialist specialist.

• Ondansetron blocks the serotonin 5‑HT3 receptors located in the central nervous system and on vagal nerve terminals in the gastrointestinal tract. By antagonizing these receptors, it prevents serotonin‑mediated activation of the vomiting centre in the brainstem, thereby reducing the stimulus to the vomiting reflex.

Common Side Effects

• Headache : mild to moderate headache in many patients.
• Constipation : reduced bowel movements or hard stools that may appear after dose administration.
• Diarrhoea : loose stools occasion ally during treatment .
• Fatigue : feelings of tired or low energy .
• Dizziness : light‑headed sensation .

Serious or Rare Side Effects

• QT‑interval prolongation : cardiac rhythm changes that may lead to arrhythmia .
• Severe allergic reactions : rash , hives , swelling of the face or throat .
• Serotonin syndrome : confusion , agitation , muscle rigidity .
• Hepatic enzyme elevation : increased liver function tests .
• Vision changes : blurred or abnormal visual perception.

Ondansetron should be used with caution in patients with known cardiac conduction abnormalities.

• Cardiac monitoring: patients with a history of QT prolongation should have ECG monitoring.
• Electrolyte balance: correct hypokalemia, hypomagnesemia, or hypocalcaemia before the c .
• Concomitant serotonergic drugs: avoid the  .
• Pregnancy  :  .
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