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ZOFRAN

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Zofran Information:

Zofran is prescribed to prevent nausea and vomiting caused by chemotherapy, radiation therapy, and surgery. Make your recovery more comfortable with the best Zofran price, promising medication for managing nausea caused by medical treatments like surgery, radiation therapy, or chemotherapy.

Zofran is a trade name for the generic medication Ondansetron. It is a brand of prescription drug primarily used to prevent nausea and vomiting caused by surgery, radiation treatment, or chemotherapy for cancer treatment. The doctors may even prescribe this medication for the treatment of morning sickness.

In 1991, the US FDA approved Zofran as the first 5-HT3 receptor antagonist to hit the market. Zofran contains the active ingredient Ondansetron Hydrochloride Dihydrate which is a racemic form of Ondansetron. The chemical name of it is (±) 1, 2, 3, 9-tetrahydro-9-methyl-3-[(2-methyl-1H-imidazol-1-yl) methyl]-4H-carbazol-4-one, monohydrochloride, dihydrate. It is a selective blocking agent of the receptor type serotonin 5-HT3. The main work of ondansetron is to prevent and treat nausea and vomiting in people, which is caused after undergoing chemotherapy, radiation therapy, or surgery.

It works by blocking 5-HT3 receptors located in the brain and gastrointestinal tract and is associated with vomiting. It helps reduce the activity of the neurotransmitter serotonin, which triggers the vomiting reflex. As it inhibits the signaling of this neurotransmitter, it prevents nausea and vomiting from occurring or lessens its severity.

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Zofran belongs to the drug class Antiemetics, Selective 5-HT3 Antagonist.The therapeutic classification of Zofran as an antiemetic and selective 5-HT3 antagonist underscores its specific mechanism of action and its primary purpose of managing and controlling episodes of nausea and vomiting. By selectively antagonizing 5-HT3 receptors, Zofran helps to reduce the activity of serotonin, a neurotransmitter that plays a significant role in triggering nausea and vomiting. 

Zofran is sold in different forms of varying strengths:

  • It is available as an injectable solution at a strength 2mg/mL
  • Tablets of strength 4mg, 8mg, and 24mg
  • Oral suspension of strength 4mg/5ML
  • Orally disintegrating tablets of strength 4mg and 8mg.

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  • Zofran is mainly prescribed to treat:
  • Chemotherapy-induced nausea
  • Vomiting in cancer patients undergoing chemotherapy,
  • Radiation-induced nausea
  • Vomiting in patients receiving radiation therapy
  • Postoperative nausea
  • Vomiting due to anesthesia or surgical procedure itself. 

The recommended dosage of Zofran for adult patients is discussed below with the indication and prescribed dose:

  • Highly Emetogenic Cancer Chemotherapy: Take a single 24mg tablet 30 minutes before the chemotherapy session.
  • Moderately Emetogenic Cancer Chemotherapy: Take an 8mg tablet 30 minutes before chemotherapy then another 8mg tablet after 8 hours. After completion of chemotherapy, take 8mg tablets twice a day every 12 hours for 1-2 days.
  • Radiation therapy-induced nausea and vomiting: Take an 8mg tablet 1-2 hours before radiation treatment.
  • Postoperative nausea and vomiting: Administer 16 mg of Zofran 1 hour before providing anesthesia.

For Pediatric patients, the recommended dose is as given.

Moderately Emetogenic Cancer Chemotherapy:

  • For 4-11 years old: Take 4mg Zofran oral suspension, oral disintegrating tablet, or tablet 30 minutes before chemotherapy. Take the same dose after 4-8 hours of the first dose and thereafter, take it 3 times a day after completion of chemotherapy.
  • For 12-17 years old: Take an 8mg tablet 30 minutes before chemotherapy. Take another 8mg tablet after 8 hours of the first dose and thereafter twice a day.  

Patients must take Zofran exactly as prescribed by their doctor and as per directions given on the product label.

They should take Zofran regularly with or without food, with a filled glass of water. If taking an orally disintegrating tablet, dissolve it in the mouth and then swallow. For oral suspension, take a dose-measuring cup, spoon, or a dose syringe to measure and take the medicine. 

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Zofran is available in the form of tablets or suspensions for administration by oral route.

The common side effects of this drug include:

  • Headache
  • Tiredness
  • Drowsiness
  • Fever
  • Weakness
  • Malaise/Fatigue
  • Anxiety
  • Rashes
  • Severe itching
  • Diarrhea or Constipation.

Some of the serious side effects of Zofran include:

  • Cardiac problems including heart palpitations.
  • Jaundice
  • Blurred vision or temporary vision loss.
  • Severe headache
  • Severe dizziness
  • Chest pain
  • Severe constipation
  • Bloating
  • Stomach ache
  • High serotonin in the body (serotonin syndrome).

  • Zofran must be cautiously taken with other medications or supplements as it can cause drug-drug interactions.
  • Zofran is known to interact with tacrolimus, antibiotics, antidepressants, tramadol, heart rhythm medicines, arsenic trioxide, anti-malaria medications, migraine headache medicines, medicines to treat psychiatric disorders, narcotics, seizure medications, and even other drugs to prevent or treat nausea and vomiting.

  • Zofran is not indicated for use by pregnant and breastfeeding women and those having an allergy to any component of the drug.
  • It is not safe for anyone having liver disease, an electrolyte imbalance, congestive heart failure, a history of long QT syndrome, or a blockage in the stomach or small intestine.
  • The drug is not intended for use by a child aged under 4 years.

  • Before taking Zofran, the patients must tell their doctor if they have a known allergy to it or any other allergy and have any medical history of cardiac issues, liver disease, or stomach/intestinal problems.
  • If they have any contraindications for Zofran, they must avoid it to prevent health risks. It’s important to avoid alcohol intake and narcotics use while taking Zofran.
  • One must be careful while doing anything that requires alertness as Zofran intake can impair thinking and reactions.
  • While taking Zofran, the patients must avoid grapefruit.

  • Store Zofran in a tight, light-resistant container away from heat and moisture, at a temperature anywhere between 15 and 30 degree Celsius.
  • Store oral suspensions of Zofran in an upright position.
  • Keep the product out of reach of children and pets.

CanadaPharmacyProCanadaPharmacyPro online pharmacy is licensed, verified, and reputable. The pharmacy has all the certifications or seals from recognized regulatory bodies. These certifications indicate that the pharmacy meets certain standards for safety and quality.

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Frequently Asked Questions:

The usual frequency of Adult Zofran dosing is 8mg twice or thrice a day, every 8-12 hours. The cases where the patients can take the drug more frequently, that is thrice a day, is when the strength of the drug taken is less than 8mg i.e. 4mg.

Zofran tablets or oral suspension can start showing its effects within 30 minutes of its administration but full effects take up to 2 hours to show up.

Zofran is a 5-HT3 receptor antagonist. This means it targets the 5-HT3 receptor present in both the central and peripheral nervous system and prevents the binding of serotonin with the receptor. Serotonin is a neurotransmitter, largely released by specialized cells in the intestine of patients receiving chemotherapy, radiation treatment, or undergoing surgery. High serotonin levels can cause nausea and vomiting.

If taking oral disintegrating tablets of Zofran, saliva can help dissolve the drug in the mouth and allow the patient to swallow the drug in portions. Therefore, there won’t be a need for drinking water. In the case of Zofran tablets, the patients must take tablets with a full glass of water. When taking Zofran before chemotherapy, radiation treatment, or surgery, it's recommended to avoid drinking much water.

Zofran drug effect can last for about 8 hours to even 12 hours after which the drug must be orally re-administered.

Shradha Joshi

Medicine Information written by Shradha Joshi, Master in Biotechnology

Updated - September 15, 2023

DISCLAIMER: The information contained in this page is supplied to canadapharmacypro.com by third party medical content expert, and is not intended to substitute medical advice from a licensed doctor. Always make sure to consult with a doctor before ordering medication online. Do not avoid or delay seeing a healthcare provider based on what you read here.

Please note that not all products, including any referenced in this page, are shipped by our affiliated Canadian Pharmacy. We affiliate with other dispensing pharmacies, that ship product directly to our customers from the following jurisdictions: Australia, New Zealand, Mauritius, India, Canada and United Kingdom. The items in your order may be split and shipped from any other pharmacy that is listed if it is not available from the chosen pharmacy. In this event, you will be contacted and approval obtained before it is shipped. Rest assured, we only affiliate with our authorized dispensaries that procure product through reliable sources.

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