Fosfomycin: What It Is and How It Works

If you’ve been prescribed a single‑dose pill for a urinary infection, chances are it’s fosfomycin. This antibiotic stops bacteria from building the cell wall they need to survive. By breaking that process, it clears infections fast without needing a long course of pills.

When Doctors Choose Fosfomycin

Fosfomycin is most common for uncomplicated urinary tract infections (UTIs) in women. It works well against E. coli, the bug that causes over 70% of UTIs. Some doctors also use it for skin infections or after surgery when a short‑term boost is needed.

Because it’s taken as a single tablet, you avoid daily dosing and the chance to miss doses. That makes it handy for people who travel or have busy schedules.

Dosage & Administration

The standard adult dose is one 3‑gram tablet taken with plenty of water after an empty stomach—usually at bedtime. You shouldn’t eat or drink anything other than water for at least two hours before and after the pill.

If you’re pregnant, have kidney problems, or are under 12 years old, talk to your doctor first. The medication can build up in the body when kidneys don’t clear it well, which may increase side effects.

Potential Side Effects

Most people feel fine after taking fosfomycin. A few report mild stomach upset, diarrhea, or a headache. If you notice severe vomiting, rash, or swelling, get medical help right away—these could be signs of an allergic reaction.

Because the drug stays in your system for several days, keep an eye on any lingering symptoms. Contact your doctor if the infection doesn’t improve after 48‑72 hours.

How to Buy Fosfomycin Safely

Buying antibiotics online can be risky. Look for pharmacies that require a prescription, show a physical address, and have clear contact information. Check reviews for delivery speed and product authenticity.

Avoid sites that sell the drug without asking for a doctor’s note—those are often counterfeit and could harm you. If you’re unsure, ask your pharmacist to recommend an online partner they trust.

Quick Tips at a Glance

• Take one 3‑gram tablet on an empty stomach with water.
• Do not eat or drink other than water for two hours before and after.
• Watch for mild stomach upset; seek help if you get rash or swelling.
• Only buy from licensed online pharmacies that ask for a prescription.
• If symptoms persist after 3 days, call your doctor.

Fosfomycin can be a convenient way to beat a simple UTI without juggling multiple pills. Just follow the dosing rules, watch for side effects, and purchase from reputable sources. That’s all you need to make it work safely and effectively.