Theophylline Drug Interactions
Theophylline can interact with prescription medications, over-the-counter products, supplements, and certain foods. Most interactions are manageable when your pharmacist knows your full medication list.
Common interaction categories to flag with your pharmacist
Other prescription medications
Bring a current list of every prescription you take when filling Theophylline. Common interactions involve blood thinners, antibiotics, antidepressants, and pain medications.
Over-the-counter products
OTC products like NSAIDs, antacids, cold/flu remedies, and sleep aids can interact with Theophylline. Confirm with your pharmacist before combining.
Supplements and herbal products
Common offenders include St John's wort, garlic, ginkgo, high-dose vitamins, and mineral supplements. Disclose all supplements when filling Theophylline.
Foods and beverages
Grapefruit, leafy greens (vitamin K), tyramine-rich foods, and others can interact with specific medications. Ask whether any apply to Theophylline.
Alcohol
Alcohol interacts with many medications, sometimes seriously. See our dedicated Theophylline and alcohol guide.
Caffeine and stimulants
Caffeine, energy drinks, and other stimulants can interact with some Theophylline use cases. Check with your pharmacist if you consume regularly.
How to check $Theophylline interactions safely
- Give your pharmacist a complete list of everything you take — prescription, OTC, supplements, herbal.
- Update your pharmacy profile whenever you start or stop a medication.
- Use a single pharmacy when possible — the pharmacist's system flags interactions automatically.
- Read the patient information leaflet that comes with Theophylline.
- Call your pharmacist before starting any new product — they're trained interaction specialists.
Symptoms that suggest an interaction
Unusual drowsiness, rapid heart rate, blood pressure changes, severe GI symptoms, unusual bleeding, or any reaction that feels new — call your pharmacist or prescriber immediately.
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Theophylline interactions: FAQs
What medications interact with Theophylline?
Theophylline can interact with many prescription medications, OTC products, supplements, and herbal remedies. Before starting Theophylline, give your pharmacist a complete list of everything you take — they'll flag any clinically significant interactions.
Can I take Theophylline with over-the-counter medications?
Some OTC medications interact with Theophylline and others don't. Common ones to ask about: NSAIDs, antacids, cold/flu products, and any sleep aids. Confirm with your pharmacist before combining.
Are there supplements I should avoid while taking Theophylline?
Supplements and herbal products can interact with Theophylline — common examples include St John's wort, grapefruit-related products, and high-dose vitamins. Always disclose supplements to your pharmacist.
What should I do if I've started a new medication and I'm on Theophylline?
Whenever you start any new prescription, OTC, or supplement, mention Theophylline to the prescriber or pharmacist. Most interactions are manageable with timing changes or dose adjustments.
Where do I find the lowest cash price for Theophylline?
Compare cash prices across local pharmacies before filling. ScriptUnlock surfaces the lowest available for Theophylline among participating pharmacies.