How to take Zofran tablets

Zofran tablets come in 4 mg and 8 mg strengths and dissolve on your tongue without water. Your doctor will tell you the dose and how often to take it — typically 8 mg three times a day for nausea after surgery, or 8 mg twice daily for nausea from chemotherapy. Place the tablet on your tongue, let it dissolve for 30 seconds to a minute, and swallow. You can take it with or without food. If you forget a dose, take it as soon as you remember, but skip it if your next dose is less than two hours away.

The tablet form works faster than swallowing a pill whole because it enters your bloodstream through the tissues under your tongue. This matters if you are vomiting or have trouble swallowing. Start taking it before you expect nausea — for example, before chemotherapy or before leaving the hospital after surgery — rather than waiting until you feel sick.

Key Takeaways

  • Zofran tablets dissolve on your tongue without water and come in 4 mg or 8 mg doses.
  • Your doctor sets your dose and schedule based on why you need it and how your body responds.
  • Take the tablet before nausea starts if you know when it will hit, such as before chemotherapy or surgery recovery.
  • Common side effects include headache, constipation, and dizziness, and you should tell your doctor if they do not go away.
  • Store tablets at room temperature away from moisture and keep them out of reach of children.

Dosing by reason for nausea

The dose depends on why you are taking Zofran. After surgery, most adults take 8 mg three times daily for the first day or two. For chemotherapy nausea, doctors often prescribe 8 mg twice daily, starting before treatment and continuing for several days. For radiation therapy, the dose is usually 8 mg three times daily. Children's doses are lower and based on weight — your child's doctor will calculate this.

Do not change your dose without talking to your doctor, even if the nausea does not stop right away. Zofran can take 30 minutes to an hour to work. If one dose is not enough, your doctor may increase it or add another type of nausea medicine rather than having you take more Zofran.

Timing and what happens after you take it

Zofran works best when you take it before nausea starts. If you know you will feel sick at a certain time — such as a few hours after chemotherapy or when you wake up from surgery — take your dose 30 minutes to an hour before that time. If nausea catches you by surprise, take a dose as soon as you can.

The tablet dissolves in your mouth within a minute. You will not taste much — it has a mild strawberry flavor. Swallow normally once it dissolves. You should feel less nauseous within 30 to 60 minutes. If you are still vomiting or feel no better after two hours, call your doctor. Do not take a second dose on your own.

Side effects and when to contact your doctor

Most people tolerate Zofran well. The most common side effects are headache, constipation, and dizziness. Constipation happens because Zofran slows your digestive system — drink extra water and eat fiber-rich foods to prevent it. Headache usually goes away on its own or with over-the-counter pain relief. Dizziness means you should sit or lie down until it passes.

Tell your doctor if you have chest pain, trouble breathing, severe dizziness, or an allergic reaction (rash, swelling of the face or throat). These are rare but need medical attention. Also report any side effect that does not go away or gets worse after a few days.

Storage and safety

Store Zofran tablets at room temperature, between 68 and 77 degrees Fahrenheit, away from heat and moisture. Keep them in their original container with the label on it so you know the dose and expiration date. Do not store them in a bathroom medicine cabinet where steam from the shower can damage them.

Keep all Zofran tablets out of reach of children and pets. If a child swallows tablets by accident, call Poison Control at 1-800-222-1222 right away. Do not use tablets after the expiration date printed on the bottle.

What to tell your doctor before taking Zofran

Before you start Zofran, tell your doctor if you have heart rhythm problems, liver disease, or kidney disease. Also mention any other medicines you take, including over-the-counter drugs and supplements, because some can interact with Zofran. If you are pregnant or breastfeeding, ask your doctor whether Zofran is safe for you — it is often used in pregnancy but your doctor needs to weigh the benefit against any risk.

If you have had an allergic reaction to Zofran or any ingredient in the tablet before, do not take it again and tell your doctor right away.

Frequently Asked Questions

Can I take Zofran with food?

Yes. Food does not change how well Zofran works. Take it with or without a meal, whichever is easier for you. If you are nauseous and cannot eat, you can still take the tablet on an empty stomach.

What if I cannot let the tablet dissolve on my tongue?

Tell your doctor. Zofran comes in other forms — liquid, regular tablets you swallow whole, and injections — that may work better for you. Do not try to swallow the dissolving tablet whole; it is designed to work in your mouth.

How long does Zofran stay in my system?

Zofran leaves your body within 24 hours, but its effect on nausea can last longer. You take it on a schedule — usually every 8 or 12 hours — to keep it working. Once you stop taking it, nausea may return if the underlying cause (surgery, chemotherapy) is still present.

Can I drink alcohol while taking Zofran?

Ask your doctor. Alcohol can make dizziness worse and may reduce how well Zofran works. If you are recovering from surgery or undergoing chemotherapy, your doctor will likely advise you to avoid alcohol anyway.

What if I miss a dose?

Take it as soon as you remember, unless your next scheduled dose is less than two hours away. In that case, skip the missed dose and take your next one on time. Never double up on doses to make up for a missed one.