Levofloxacin — what it treats and how to use it safely

Levofloxacin is a powerful antibiotic often used for lung, sinus, skin, and urinary infections. It can clear stubborn bugs fast, but because it has serious possible side effects, you should treat it with respect. Below are clear, practical pointers on when to take it, how much, and what to watch for.

When and how to take levofloxacin

Doctors pick levofloxacin for moderate to severe infections when other antibiotics won't work or when the bacteria are known to be susceptible. Typical adult oral doses run from 250 mg to 750 mg once daily. Shorter courses (5 days) can work for some respiratory infections; others need 7–14 days. Follow your prescriber's exact dose and finish the whole course — stopping early can let the infection come back stronger.

Take levofloxacin with water. Avoid dairy or calcium-fortified drinks within 2 hours before or after a dose — calcium, magnesium, iron, and aluminum contain ions that cut absorption. If you forget a dose, take it as soon as you remember unless it's close to the next dose; don’t double up.

Side effects, interactions, and safety tips

Minor side effects include nausea, headache, and dizziness. Stop the drug and call your doctor if you get tendon pain (especially the Achilles), tingling or numbness, severe diarrhea, or signs of allergy like rash and swelling. Fluoroquinolones like levofloxacin can raise the risk of tendon rupture, cause nerve damage (peripheral neuropathy), and affect heart rhythm (QT prolongation) in some people.

Tell your doctor about other medicines: antacids and supplements with calcium, iron or magnesium lower levofloxacin levels. Certain heart drugs and some antipsychotics can interact and increase QT risk. If you take warfarin, your INR may change and needs checking. Pregnant people, children, and people with certain muscle or tendon disorders usually should avoid levofloxacin unless there's no safe alternative.

Thinking of buying levofloxacin online? Always use a licensed pharmacy and a valid prescription. Avoid sites that sell without a prescription, offer suspiciously low prices, or lack clear contact info and pharmacist support. Check reviews and look for regulatory seals or national registration numbers.

Store levofloxacin at room temperature away from moisture and heat. Keep it out of reach of children. If you experience severe side effects or new symptoms while taking the drug, stop and get medical help right away. For any doubts about dose changes, kidney problems, or drug interactions, call your prescriber — they can tailor the plan to your situation.

Short, practical takeaway: levofloxacin treats many serious infections but carries rare yet serious risks. Use it only when prescribed, follow dosing rules, avoid mixing with certain minerals, and watch closely for tendon or nerve problems.