Theophylline – What It Is, How It Works, and When to Use It

Ever heard of theophylline and wondered if it’s right for you? It’s a long‑standing drug that helps open up the airways, so people with asthma or COPD can breathe easier. Unlike inhalers that act fast, theophylline works behind the scenes for several hours, making it a handy backup when you need steady relief.

How theophylline works and who might need it

Theophylline belongs to a class called methylxanthines, the same family as caffeine. It relaxes the muscles around your airways and also reduces inflammation a bit. Doctors usually prescribe it for adults who still have breathing problems despite using inhalers, or for kids when other options aren’t enough.

Getting the dose right – tips and common amounts

Because theophylline stays in the blood for a long time, getting the right dose is crucial. Most adults start with 200‑300 mg taken twice a day, but your doctor may adjust it based on blood‑test results. Kids get a weight‑based dose, typically around 5‑10 mg per kilogram daily, split into two or three doses. Never change the amount on your own – even a small rise can cause jittery nerves, fast heartbeats, or nausea.

Blood‑level checks are the gold standard. Doctors aim for a range of 10‑20 µg/mL. If you feel shaky, have a fast heart rate, or get an upset stomach, call your doctor right away. Those symptoms often mean the level is too high.

Side effects and things to watch out for

Theophylline can cause headaches, trouble sleeping, or an upset stomach. More serious issues include irregular heartbeats and seizures, but they’re rare when you stay in the safe blood‑level window. Alcohol, certain antibiotics (like erythromycin), and some heart meds can push the level up, so always tell your pharmacist about every drug you take.

If you miss a dose, take it as soon as you remember – unless it’s almost time for the next one. Don’t double up; a higher dose can quickly tip you over the safe limit.

Buying theophylline safely online

Buying theophylline from a reputable pharmacy is key. Look for licensed online pharmacies that require a prescription, offer a clear privacy policy, and have real pharmacists you can contact. Avoid sites that sell the drug without asking for a prescription – they often ship low‑quality or counterfeit pills.

When you receive the medication, check the label for the exact strength (e.g., 100 mg tablets) and the expiration date. Store it in a cool, dry place and keep it out of reach of children.

That’s the quick rundown on theophylline. If you think it might help you breathe easier, talk to your doctor, get the right dose, and keep an eye on any side effects. With the right care, theophylline can be a solid part of your breathing‑health toolbox.