Cefaclor is a second-generation antibiotic used for ear, sinus, and throat infections. Compare it with amoxicillin, cephalexin, and azithromycin to understand which is best for your condition, side effects, and resistance patterns.
When your doctor prescribes Cefaclor, a second-generation cephalosporin antibiotic used to treat bacterial infections like bronchitis, ear infections, and skin infections. Also known as Ceclor, it works by stopping bacteria from building strong cell walls — a method that makes it effective against many common infections without being as broad as some stronger antibiotics. Unlike penicillin, which can trigger allergies in some people, Cefaclor is often used when someone can’t take amoxicillin — but it’s not a magic bullet. It only works on bacteria, not viruses, so it won’t help with colds or flu. If you’ve ever been told to finish your whole course of antibiotics, that’s because stopping early can let the toughest bacteria survive and come back stronger.
Cefaclor is part of the cephalosporin a class of antibiotics that includes drugs like cephalexin and cefdinir, used for everything from urinary tract infections to pneumonia family. It’s not the first choice for every infection — doctors usually start with something simpler like amoxicillin — but when that doesn’t work, or if you’re allergic, Cefaclor steps in. It’s taken by mouth, usually two or three times a day, and works best on an empty stomach. But here’s the catch: some people get stomach upset, diarrhea, or even a rash. If you’ve had a severe allergic reaction to penicillin, your doctor will think twice before giving you Cefaclor — because cross-reactivity is real. It’s not guaranteed, but it’s risky enough to warrant caution.
What you won’t find in the prescription bottle is how often Cefaclor is paired with other treatments. For example, if you’re being treated for a sinus infection, your doctor might also recommend saline rinses or nasal sprays to reduce swelling. Or if you’re on Cefaclor for a skin infection, they might suggest keeping the area clean and dry — not just popping pills. And while you’re taking it, you should avoid alcohol. Not because it’s deadly with Cefaclor, but because it can make you feel worse — nausea, dizziness, fatigue — and that’s the last thing you need when your body’s already fighting an infection.
You’ll also see Cefaclor mentioned alongside other antibiotics like erythromycin a macrolide antibiotic used for respiratory infections, often when penicillin isn’t an option or minocycline a tetracycline antibiotic used for acne and some respiratory infections, known for its long half-life and potential side effects. But Cefaclor is different. It’s faster acting than minocycline, less likely to cause sun sensitivity than tetracyclines, and gentler on the gut than some broader-spectrum drugs. Still, it’s not perfect. Resistance is growing. Overuse has made some strains of bacteria immune to it. That’s why it’s not handed out like candy — and why your doctor won’t prescribe it unless they’re sure it’s the right tool for the job.
What you’ll find in the posts below are real stories and practical advice about using Cefaclor safely. Some people share how they handled the side effects. Others compare it to other antibiotics they’ve tried. There’s advice on what to eat while taking it, how to avoid drug interactions, and when to call your doctor if something feels off. This isn’t just a list of articles — it’s a collection of experiences from people who’ve been there, and the science behind why it matters.
Cefaclor is a second-generation antibiotic used for ear, sinus, and throat infections. Compare it with amoxicillin, cephalexin, and azithromycin to understand which is best for your condition, side effects, and resistance patterns.