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Nuelin SR (Theophylline) 300mg (100 Tablets)

Prescription Upload Attached. Prescription On File. Prescription sent to email

Active Ingredients: Each tablet contains 300mg theophylline

Manufacturer: Symbion

Prescription medicine: This is a prescription medicine. Please ensure that you have read the "Ordering Prescription Medicine" page before ordering this item. We require you to upload your veterinary prescription and post us the original. You will need to send your prescription to

PetPA Pharmacy

Reply Paid 91355

Tweed Heads NSW 2485


Australian legislation prohibits the advertisement of prescription drugs to consumers; therefore, we are unable to display any images of the packaging or provide you with more information regarding this prescription medicine. All prescription medicines on the Your Pet PA website are purchased through Veterinary Wholesalers the same as those used by your Vet. All our products are APVMA approved and identical to those used by your Veterinary Surgeon. Please call or email us if you have any queries about any of the products on our site.



Commonly asked questions about Nuelin SR Tablets:

What are Nuelin SR Tablets?

Nuelin is a prescription medication that treats asthma and some heart conditions. Nuelin works by relaxing the airways and by inhibiting the release of inflammation-causing mast cells. Sustained release (SR) allow the drug to enter the system more slowly so that fewer doses need to be given.

Why do cats and dogs use Nuelin?

Theophylline may be prescribed for conditions such as asthma, coughing, collapsing trachea, and other respiratory conditions. Nuelin may also be given with other medications to treat heart conditions that involve elevated blood pressure in the lungs.

What else should I know about Nuelin?

Nuelin is a medication that will likely require blood level monitoring, so it is crucial for you to keep all appointments with your pet's veterinarian.

What problems could my dog or cat have with Nuelin?

Nuelin can cause nausea, vomiting, headache, and insomnia. Nervousness and stomach upset seen at the beginning of treatment may go away over time as the body adjusts to the drug. Signs of toxicity should be reported to your pet's veterinarian right away and they include persistent vomiting, cardiac arrhythmias, and seizures.

How do you use Nuelin?

Nuelin may be given with or without food. Follow your veterinarian's directions. Nuelin is only effective if given regularly as prescribed. Be careful not to miss doses. Do not double up the dose if you miss one.

What is in Nuelin?

The active ingredient in Nuelin is theophylline. The drug Theophylline is a bronchodilator and diuretic. It opens the air passages in the lungs by relaxing the muscles in the lungs and chest.

Pet Prescription Medications

Pet PA is not a pharmacy but facilitates the supply of prescription medications by an Australian registered pharmacist through our website. When purchasing prescription medication through PetPA Pharmacy online you know that:

  • All prescription medication supplied is sourced from Australian veterinary wholesalers and Australian registered pharmacists.
  • All prescription medication available is registered with the Australian Government (TGA or APVMA),
  • All medication supplied is processed and dispensed by Australian-registered pharmacists.

All prescription medication listed on the PetPA website is available for supply on acceptance of your order by the pharmacist and on receipt of the original prescription by the pharmacist. As PetPA cannot sell or supply prescription medication and is your agent in facilitating the supply by the pharmacist, the acceptance of your order and sale is by the pharmacist*.

*PetPA provides the price information of medicines as agent for PetPA Pharmacy Pty Ltd (ABN: 33 658 263 462) trading as Pet PA Pharmacy, 133 Wharf Street, Tweed Heads NSW 2485. Pharmacy Registration Number: PC1241648). All medication supplied on acceptance of your order by the pharmacist will be supplied by PetPA Pharmacy.