Onfast 2mg Tablet belongs to a group of medications called ' anti-emetics' primarily used in the prevention of vomiting (being sick) and nausea (feeling sick) that usually occur after cancer chemotherapy, radiation treatment or surgery. Nausea is an uneasy feeling in which a person feels an urge to vomit while vomiting is the natural response to the body to forcefully discharge the stomach contents.

Onfast 2mg Tablet contains 'Ondanestron' that works by blocking the action of a chemical in the body (serotonin) responsible for causing nausea and vomiting. As a result, Onfast 2mg Tablet prevents the sensation of nausea and vomiting caused due to conditions like surgery, cancer chemotherapy, pregnancy or motion sickness.

Take Onfast 2mg Tablet as prescribed. Your doctor will advise you on how often you take Onfast 2mg Tablet based on your medical condition. A person taking Onfast 2mg Tablet often experience side effects that include a feeling of warmth, constipation, headache, diarrhoea, headache, drowsiness, feeling of tiredness. Although, not every person faces the side effects of Onfast 2mg Tablet, and even some of the unpleasant effects of Onfast 2mg Tablet do not require medical attention.

The use of Onfast 2mg Tablet is restricted in persons who are allergic to any of the ingredients present in this medicine. Tell your doctor if you are facing liver, kidney, or heart disorders. Onfast 2mg Tablet should be used during pregnancy or breastfeeding after consulting a doctor. Onfast 2mg Tablet contains lactose so tell your doctor if you have an intolerance to some sugars.

Onfast 2mg Tablet belongs to a group of medications called anti-emetics used to prevent nausea and vomiting associated with conditions like cancer chemotherapy, radiotherapy, surgery, pregnancy and motion sickness in adults and children above 4 years of age. When serotonin level increases in the blood, it stimulates the CTZ receptor (chemoreceptor trigger zone) located in the brain responsible for controlling nausea and vomiting. Onfast 2mg Tablet acts by inhibiting the release of this serotonin, thereby preventing nausea and vomiting. 

Tell your doctor if you are dealing with an uneven heart, liver problems, or any other problem. Tell your doctor if you are taking medicine for epilepsy, cancer medicines, and abnormal heartbeats. Onfast 2mg Tablet may affect a person's ability to drive. Therefore, should avoid driving or operating any machine. People with an irregular heartbeat (arrhythmia), and phenylketonuria (too much of protein phenylalanine in the blood) should not take Onfast 2mg Tablet as it may cause serious conditions. The liver patient should not take more than 8 mg of Onfast 2mg Tablet daily. Onfast 2mg Tablet should be used during pregnancy or breastfeeding after consultation with a doctor. Taking Onfast 2mg Tablet with apomorphine can cause a sharp dip in blood pressure, even leading to death, so avoid its intake together.

• Do not use Onfast 2mg Tablet with Apomorphine as it can cause a sudden fall of blood pressure leading to death or coma.
• Onfast 2mg Tablet contains 'phenylalanine' so if you have Phenylketonuria (PKU) avoid its intake.