Free ShippingOver $49
My ProfileMy OrdersMy AutoShipMy RxMy PetsMy VetsMy RewardsSign In
Product Page

Theophylline ER Tablet Rx

This Item Ships FREE!
Save 10% on your 1st AutoShip order and 5% on all future AutoShip orders

Please confirm

This item is already on your autoship schedule! Are you sure you want to add it again?

Product Overview

How To Use

What’s in it?



Questions & Answers

Product Description

Theophylline, EXTENDED RELEASE is used to treat or prevent the symptoms of asthma or to treat chronic bronchitis. Theophylline relieves cough, wheezing, shortness of breath, and troubled breathing. *Sold per Tablet. 

What is Theophylline ER Tablet?

Theophylline is a bronchodilator used to open air passages in the lungs.

Who is Theophylline ER Tablet for?

Dogs and Cats

Why use Theophylline ER Tablet?

-Easy to administer for cats and dogs -Effectively opens air passages in the lungs

How does Theophylline ER Tablet work?

Theophylline opens air passages in the lungs by relaxing muscles in the lungs and chest.


Teva / Rhodes

Active ingredient(s):


How is Theophylline ER Tablet sold?

Single Tablets in Strengths of : 100mg 200mg 300mg 400mg

What are the side effects of Theophylline ER Tablet?

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 special precautions are there?

Keep away from children and animals

What to do if overdose?

In case of overdose contact your nearest pet hospital

How can I store Theophylline ER Tablet?

Store in a cool dry place

Helpful Tips:

Pharmacists are standing by to offer Pet Parent counseling regarding prescription medication purchased from Allivet before and after dispensing. Pharmacists on duty are available Monday-Friday, 9:30AM - 5:30PM EST and will be on call Saturday 12:00PM - 4:00PM EST for consultation.

Use as directed by your veterinarian


Is your cat suffering from Asthma? Learn the symptoms and what you can do about it. Click Feline Asthma

Write a Review

Theophylline ER Tablet

3 Questions 3 Answers

Questions With Most helpful Answers?

Is the 300 mg Theophylline a tablet or capsule?

1 Answer

Theophylline discontinued?

1 Answer

How many tablets of theophylline in a bottle? Is it 100 ct regardless of strength?

1 Answer
Ask a New Question

Don’t know something or can’t find the information you are looking for? Ask us a question!

*Required Fields
We will ONLY use your email to notify you in regards to your submission.Privacy StatementQuestions & answers are typically posted within 24 hours, pending approval.