Tetracycline Dosage: What You Need to Know Before You Start

Tetracycline is a broad‑spectrum antibiotic that doctors often prescribe for acne, respiratory infections, and certain STIs. Getting the dose right matters – too little may not clear the infection, and too much can cause stomach upset or make your teeth look yellow. Below you’ll find the most common dosing schedules, practical tips for taking the pill, and what to watch out for.

Standard Adult Dosing

For most infections, adults take 250 mg to 500 mg every 6 hours. That means three to four tablets a day, depending on the strength you have. Your doctor might start you on a higher dose (500 mg) for a severe infection and then drop to 250 mg for maintenance. Always follow the exact timing – set an alarm if you need to. Taking tetracycline with food can reduce stomach irritation, but avoid dairy, calcium‑rich antacids, or iron supplements within two hours of the dose because they bind to the drug and lower its effectiveness.

Pediatric and Special‑Population Dosing

Kids under 8 years generally shouldn’t use tetracycline because it can affect bone growth and teeth color. If a child older than 8 needs it, the usual dose is 25 mg per kilogram of body weight taken twice daily. For pregnant or nursing mothers, tetracycline is usually avoided; talk with your provider about alternatives. People with liver or kidney problems may need a lower dose, and your doctor will adjust it based on lab results.

**What to Do If You Miss a Dose** – Take the missed tablet as soon as you remember, unless it’s almost time for the next one. In that case, skip the missed dose; don’t double up. Doubling can increase the risk of nausea and dizziness.

**Common Side Effects** – Upset stomach, diarrhea, and mild sun sensitivity are the most frequent. If you develop a rash, persistent vomiting, or severe headache, call your doctor right away. Because tetracycline can make you more prone to sunburn, wear sunscreen and a hat when you’re outdoors.

**Drug Interactions to Watch** – Besides dairy and antacids, avoid taking tetracycline with blood thinners (like warfarin), oral contraceptives, or seizure meds (such as carbamazepine). These combos can either weaken the antibiotic or increase the risk of bleeding.

**Storage Tips** – Keep the tablets in a dry place, away from heat and moisture. Don’t store them in the bathroom cabinet. If you’re using a liquid form, shake the bottle well before each dose and discard any leftover after 14 days.

**Bottom Line** – Stick to the prescribed schedule, space it out from calcium‑rich foods, protect your skin from the sun, and report any weird symptoms immediately. When you follow these simple rules, tetracycline works efficiently and you stay on the road to recovery without nasty surprises.