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POM-V Prescription Required Companion Animal

Corvental-D 200 mg Hard Capsules for Dogs

Active ingredient: Theophylline

Form

Capsule

Species

Dogs

Manufacturer

Elanco GmbH

VMD MA No.

52127/3011

What it's used for

For the treatment of bronchitis and congestive heart failure in dogs.

Full indications, dosage and side effects ↓
View official SPC (PDF)

The prescription itself has a price. See what practices near you charge for a consultation and the written prescription fee.

Paying less for Theophylline

  1. 1

    Ask your vet for a written prescription

    They must provide one on request. Under the CMA Order the fee is capped at £21 from 2027.

  2. 2

    Fill it at a registered online retailer

    The CMA found online pharmacies 50–60% cheaper than practice dispensing on common medicines — typically £200–£300 a year.

Prescription required

Your vet must provide a written prescription on request. You can then purchase from any licensed online retailer.

Clinical information

Corvental-D 200 mg Hard Capsules for Dogs — SPC Details

Source: VMD Summary of Product Characteristics (SPC). Last updated 26 Mar 2026.

For the treatment of bronchitis and congestive heart failure in dogs.
20 mg per kg bodyweight to be given orally once daily only.
Care should be taken to ensure that dogs are weighed carefully and accurately,
and the dose does not exceed 20 mg/kg body weight.

Revised: March 2025
AN: 04052/2024
Concurrent use of beta-sympathomimetics is contra-indicated, as additive or
synergistic interactions, resulting in exaggerated side effects may result.
Do not use in dogs with a known history of epileptiform seizures as convulsions
have been reported in patients on theophylline treatment, often with no preceding
signs of toxicity and in otherwise apparently normal animals.

Revised: March 2025
AN: 04052/2024
The following side effects have been reported: restlessness, agitation,
excitement, vomiting, diarrhoea, polydipsia, sedation, reduced appetite and
polyuria.
If signs of CNS excitement occur, (twitching, restlessness or convulsions)
discontinue treatment immediately.
None known.

i. Special precautions for use in animals
Theophylline should be used with caution in patients with liver disease. If
vomiting occurs, the dose should be reduced or the treatment discontinued.
ii. Special precautions to be taken by the person administering the veterinary
medicinal product to animals
In the case of accidental ingestion, seek medical advice immediately and
show the package leaflet or the label to the physician.
Plasma theophylline levels may increase in patients under treatment with
macrolide and fluoroquinolone antibiotics, such as erythromycin and enrofloxacin,
and decrease in patients receiving phenobarbitone or phenytoin.
Theophylline may reduce the convulsive threshold in patients receiving ketamine.
Administration of theophylline shortly before halothane anaesthesia may result in
arrhythmogenic effects.
Do not store above 30C. Store in a dry place.

Revised: March 2025
AN: 04052/2024
Not applicable.
5.

This information is sourced from the official Summary of Product Characteristics (SPC) published by the Veterinary Medicines Directorate (VMD). It is provided for informational purposes only and does not replace professional veterinary advice. Always consult your vet before administering any medication.

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