How it works: Theophylline opens air passages in the lungs by relaxing muscles in the lungs and chest.
Cautions: The medication is best given on an empty stomach. Theophylline should not be given to pregnant or nursing animals. Theophylline E.R. tablets are scored and may be broken in half. These tablets should not be chewed or crushed.
Brand Name Theolair (UCB Pharma), Theo-Dur (Key), Uniphyl (Purdue Pharma)
Generic Name Theophylline E.R.
What is the most important information I should know about theophylline: Always check the medicine when it is refilled to make sure you are getting the correct brand and type as prescribed by your veterinarian. Ask the pharmacist if you have any questions about the medication you received from the pharmacy. There are many medications that can interact with theophylline. Tell your veterinarian about all the prescription and over the counter medications you give your pet. These include vitamins, minerals, herbal products, and medications prescribed by other veterinarians. Theophylline is not FDA approved for use in veterinary medicine; however, it is a commonly accepted practice for veterinarians to use this medication in dogs and cats. Theophylline is available by prescription in 100mg and 200mg, Extended Release (ER), tablets. The usual dose in dogs is 4.5 to 6.8mg per pound every 12 hours. The usual dose in cats is 2mg per pound every 8 to 12 hours.
What is theophylline: Theophylline is a bronchodilator which relaxes muscles in the lungs and chest. Theophylline is used in the treatment of heart failure, asthma, bronchitis, and pulmonary edema. Theophylline may also be used for purposes other than those listed in this medication guide.
What should I discuss with my veterinarian before giving theophylline: Tell your veterinarian if your pet is allergic to theophylline, or if your pet has stomach ulcers; epilepsy; heart rhythm problems; congestive heart failure; fluid in the lungs; hypothyroid; fever; liver, or kidney disease. Tell your veterinarian if your pet is pregnant or lactating, or if you plan on breeding your pet.
How should this medication be given: Give theophylline exactly as directed by your veterinarian. Do not give the medication in larger amounts, or for a longer period of time than recommended by your veterinarian. Follow the directions on the prescription label. Allow plenty of water for the pet to drink. Theophylline ER tablets should not be crushed, chewed, or broken unless the veterinarian tells you to. The tablet should be swallowed whole so that the medication is released slowly. Breaking the tablet may cause too much of the medication to be released at one time. Store theophylline at room temperature, away from moisture, heat, and light.
What happens if I miss a dose: Give the missed dose as soon as you remember. If it is almost time for your next dose, skip the dose that was missed and give only the next regularly scheduled dose, as directed. Do not give a double dose of this medication unless otherwise directed by your veterinarian.
What happens if I overdose the pet: Call your veterinarian or veterinary emergency room. Symptoms of overdose may include nausea, vomiting, insomnia, tremors, restlessness, uneven heartbeats, and seizures.
What should I avoid while giving theophylline: Do not give this medication if your pet has severe heart disease, liver or kidney disease, hyperthyroid disease, high blood pressure, or stomach ulcers.
What are the possible side effects of theophylline: If any of the following serious side effects occur, stop giving theophylline and seek emergency veterinary medical attention; an allergic reaction (difficulty breathing, swelling of the lips, tongue, face, or hives). Stop giving theophylline and call your veterinarian at once if any of the following side effects occur; seizures; severe nausea and vomiting, and restlessness; coughing up blood or vomit that looks like coffee grounds; urinating more than normal. Other less serious side effects may also occur. Talk to your veterinarian if your pet experiences mild nausea, loss of appetite, weight loss; restlessness, or insomnia; headache, or dizziness. Side effects other than those listed here may also occur. Talk to your veterinarian about any side effect that seems unusual or that is especially bothersome.
What other drugs will affect theophylline: Tell your veterinarian if your pet is using cimetidine (Tagamet); erythromycin (E-Mycin, Ery-Tab); propranolol (Inderal). Drugs other than those listed here may also interact with theophylline. Talk to your veterinarian or pharmacist before giving any prescription or over the counter medications including vitamins, minerals and herbal supplements.
Where can I get more information: Your pharmacist has additional information about theophylline written for health professionals that you may read.
Call your veterinarian for medical advice about any side effects to your pet. You may report side effects to the FDA at 1-800-FDA-1088.
Theophylline E.R. (extended release) is a prescription bronchodilator which is used to open air passages in the lungs in dogs and cats. By relaxing the smooth muscle of the lung it makes it easier for the pet to breathe.
Theophylline E.R. is not FDA approved for use in veterinary medicine; however, it is a commonly accepted practice for veterinarians to prescribe this medication for dogs and cats.
Theophylline E.R. is used in the treatment of heart failure, pulmonary edema, bronchial asthma, and chronic obstructive pulmonary disease.
Tip: Theophylline E.R. tablets should not be crushed, chewed, or broken unless told to do so by your veterinarian. The tablet should be swallowed whole so that the medication is released slowly. Breaking the tablet may cause too much of the medication to be released at one time. Give theophylline on an empty stomach, 1 hour before or 2 hours after a meal.
The usual dose for dogs is 4.5 to 6.8mg per pound of pet’s body weight by mouth every 12 hours. Allow plenty of water for the pet to drink
The usual dose for cats is 2mg per pound of pet’s body weight by mouth every 8-12 hours. Allow plenty of water for the pet to drink
Storage: Store Theophylline E.R. at room temperature away from moisture, heat and light.
Active Ingredients (per tablet)
Active Ingredients (per tablet)
cat with asthma
The product has helped with the asthma although he still coughs but not nearly as much.
Tex's cough developed over last winter and was getting worse - in mind it was woodstove, my nasty cigs, cats, dust, etc.
It is also heart murmur, throat is narrow or swolen and he is getting old! My vet prescribed theophylline two month ago and the cough started to get better right away so of course I will maintain this "cure" but had to save money on future purchases so here I am!
Thanks for providing these medications to we, the 99%!
Same product lower price
This medication is the same brand as I got from my vet but about $15 less. The medication was shipped in a very timely manner I am very pleased with my purchase of theophyllin from 1800petmeds.
My dog has breathing problems due to a collapsing trach and heart problems. As she gets older the breathing has gotten so hard for her that just picking her head up was hard. Our wonderful Vet put her on Theophylline 3 times a day. By the end of the second day she was breathing easier and by the end of day 4 her breathing was slow and steady and we can hardly hear her now. Plus she has more energy. This is a wonderful product. I'll always keep her on it. I pray they don't stop making it.
Our cat was having a very hard time breathing and was on steroids. The vet added this to his regimen and not only did he breathe better but he also had more energy to move more. I recommend it.
I haven't taken my cat to doctor, but seems to have symptoms of asthma. I have 200 mgs of this med for myself, not much money either. Can I give some to my cat? And if so how much? I would like to try to see if works before spending money if possible. Thank you
Do not give your medication to your pet. Dosing for pets is different from humans. It can be very dangerous to give human medication to your cat. Please consult with your vet regarding the proper medication and treatment for your cat.
Theophylline is over $10 for 10- 14 pills. I can get a month's supply here for that price. Pet insurance will only pay a percentage of their costs of around 30 cents a pill. My vet says they do not allow their prescriptions to be filled online like this. Is this normal? They said not for a prescribed medicine...should I look for another vet? Should I not be able to take the prescription and get it filled where I want? How do other people do it?
Your vet is able to do this, they just have to give their okay when you place your order. Tell your vet you ARE ordering online and that they will get an email regarding the scrip! If they don't do this for you you definitely need to change your pet's doctor!
Hi Lynn, Normally we contact the vet to obtain an approval, I am sorry you're having this difficulty with getting your medication. I would suggest to ask him for a written prescription that you would be able to use where ever you would like. You would mail that to us and once we receive the original we do not have to contact your vet and we can finalize the order for you.
This information sheet is for educational purposes only and is intended to be a supplement to, and not a substitute for, the expertise and professional judgment of your veterinarian. The information is NOT to be used for diagnosis or treatment of your pet. You should always consult your own veterinarian for specific advice concerning the treatment of your pet. The information is not intended to cover all possible uses, directions, precautions, warnings, allergic reactions, drug interactions or adverse effects, nor should it be construed to indicate that use of a particular drug is safe, appropriate or effective for your pet. It is not a substitute for a veterinary exam, and it does not replace the need for services provided by your veterinarian. Note: Any trademarks are the property of their respective companies.