When you take clarithromycin, a macrolide antibiotic used to treat bacterial infections like pneumonia, bronchitis, and skin infections. Also known as Biaxin, it works by stopping bacteria from growing, but it doesn’t come without risks. Many people take it without issues, but others experience side effects that can be mild or serious enough to stop the treatment.
One of the most common problems is stomach upset, including nausea, diarrhea, and abdominal pain. It’s so frequent that nearly 1 in 5 people report it. You might also notice a strange taste in your mouth—bitter or metallic—which usually goes away after you finish the course. Less common but more serious are liver problems, signaled by yellowing skin, dark urine, or persistent vomiting. If you see these, stop taking it and get help right away. Clarithromycin can also mess with your heart rhythm, especially if you’re older or already on other meds like statins or blood pressure pills. That’s why doctors check your history before prescribing it.
It doesn’t just affect your gut or heart. Some people get headaches, dizziness, or even a rash. In rare cases, it can trigger a severe allergic reaction or a dangerous gut infection called C. diff, which causes watery diarrhea and cramps. You’re more at risk if you’ve taken antibiotics before or are on them for a long time. And don’t forget interactions: mixing clarithromycin with certain heart drugs, antacids, or even grapefruit juice can change how it works—or make side effects worse.
What you’ll find below is a collection of real, practical guides from people who’ve dealt with these issues firsthand. You’ll see how others managed nausea while on antibiotics, what to do when dizziness hits, and how to spot the warning signs before they turn dangerous. These aren’t just lists—they’re lived experiences, backed by medical insight, focused on what actually matters when you’re taking this drug. Whether you’re just starting clarithromycin or already dealing with side effects, the posts here give you the clear, no-fluff facts you need to stay safe and informed.
Clarithromycin is an effective antibiotic for community-acquired pneumonia, especially for those allergic to penicillin. It works well against common bacteria but has risks and interactions. Learn when it’s the right choice and when to avoid it.