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jean_hudson2026-04-18

I've been taking Ondansetron 4mg/2ml Pf Syr Inj, 2ml for the past three weeks to manage nausea and vomiting caused by my chemotherapy treatments. I've heard it's commonly used for this purpose because it blocks serotonin, which can help with the feeling of sickness. Has anyone else tried this medication and, if so, how has it worked for you? I've had very few side effects so far. I've had some minor headaches and fatigue, but nothing major. However, I'm concerned about the potential severe side effects like allergic reactions, serotonin syndrome, and abnormal heartbeats. Has anyone had to deal with these? Also, when I was reading the side effects list, I saw there's some possibility of masking a bowel block. What does that mean for me? I want to be as informed as possible. Please share your stories, tips, and concerns here!

1 min read
last active 4/18/2026
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Comments (6)

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ethan_ferguson4/17/2026

I've had a lot of nausea from radiation treatments but Ondansetron has been a lifesaver. I've had no side effects at all, just make sure you drink plenty of water to stay hydrated.

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logan_johnson4/17/2026

I've read that Ondansetron can potentially mask the signs of a bowel block, especially if you've had surgery. It's something to be aware of, especially if you're experiencing stomach pain or swelling. Just something to keep an eye on.

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kathleen_gray4/17/2026

I've had serotonin syndrome before with a combination of meds including Ondansetron. It's not fun. If you feel agitated, confused, or have a fever and fast heartbeat, get help right away. Please be careful folks.

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christopher_hansen4/17/2026

I've had Ondansetron in the past and I actually had a pretty bad reaction to it. I got severe hives and it was absolutely terrifying. I had to switch to something else. You should definitely be aware of that side effect.

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wayne_silva4/17/2026

Anyone else feeling extremely sleepy after taking Ondansetron? I've been fighting to stay awake during the day. It's like a sedative to me.

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abigail_andrews4/17/2026

Definitely keep an eye out for any signs of an allergic reaction. It's rare but it can happen. If you start noticing rash, hives, itching or swelling, let your doctor know.