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POM-V Prescription Required Companion Animal

Proin 50 mg Chewable Tablets for Dogs

Active ingredient: Phenylpropanolamine Hydrochloride

Form

Chewable

Species

Dogs

Manufacturer

Pegasus Laboratories Ireland Limited

VMD MA No.

52366/5001

What it's used for

For the management of urinary incontinence associated with urethral sphincter incompetence in the bitch, particularly that associated with ovariohysterecto...

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

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  1. 1

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    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

Proin 50 mg Chewable Tablets for Dogs — SPC Details

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

For the management of urinary incontinence associated with urethral sphincter
incompetence in the bitch, particularly that associated with ovariohysterectomy.
Oral use.
The recommended dose of phenylpropanolamine hydrochloride is 1.5 mg/kg
bodyweight twice daily.
The product should be administered at the time of feeding or shortly after.
The following table can be used as a guide to administer the recommended dose:
Number of tablets
to be administered twice daily
bodyweight range
(kg)
1 tablet
1.5 tablets
2 tablets
>25-33
>33-50
>50-65
The remaining tablet portion should be given at the next administration.
Do not use in hypertensive animals or in animals that become hypertensive after
initiating therapy.
Do not administer to patients treated with non-selective monoamine oxidase
inhibitors.
Do not use in case of known hypersensitivity to active substance or to any of the
excipients.
Sympathomimetics may produce a wide range of effects, most of which mimic the
results of excessive stimulation of the sympathetic nervous system (e.g.
hypertension).
Vomiting/emesis and anorexia have been very commonly reported and diarrhoea,
lethargy, agitation and panting commonly reported.

Revised: November 2025
AN: 02313/2025
If adverse reactions occur, depending on the severity of the signs observed,
treatment should be discontinued and the advice of a veterinarian should be sought.
Aggressiveness and restlessness have been noted in some dogs following treatment.
The frequency of adverse reactions is defined using the following convention:
- very common (more than 1 in 10 animals treated displaying adverse reaction(s))
- common (more than 1 but less than 10 animals in 100 animals treated)
- uncommon (more than 1 but less than 10 animals in 1,000 animals treated)
- rare (more than 1 but less than 10 animals in 10,000 animals treated)
- very rare (less than 1 animal in 10,000 animals treated, including isolated reports).
In bitches less than 1 year old the possibility of anatomical disorders contributing to
incontinence should be considered prior to treatment.
Do not use the product for the treatment of behavioural causes of inappropriate
urination.

Revised: November 2025
AN: 02313/2025

Special precautions for use in animals
Phenylpropanolamine, a sympathomimetic drug, may affect the cardiovascular
system, especially blood pressure and heart rate, and should be used with caution in
animals with cardiovascular diseases.
Phenylpropanolamine has been shown to increase mean arterial blood pressure
resulting in hypertension over time. Animals administered the product should
therefore be monitored for signs of hypertension, particularly with prolonged use of
the product. Care should be exercised in treating animals with pre-existing heart
disease, renal or hepatic insufficiency, diabetes mellitus, hyperadrenocorticism,
glaucoma, hyperthyroidism or other metabolic disorders that may predispose to
hypertension.
Instances of dogs chewing through closed bottles and eating the bottle contents have
been reported. Store the product securely out of reach of dogs and other pets in
order to prevent access and possible overdose. In case of overdose, consult a
veterinarian (See section 4.10).
Special precautions to be taken by the person administering the veterinary medicinal
product to animals
Phenylpropanolamine hydrochloride is toxic when overdoses are ingested. Adverse
effects may include dizziness, headache, nausea, insomnia or restlessness, and
increased blood pressure. High overdose may be fatal, especially in children.
People with known hypersensitivity to phenylpropanolamine or any of the excipients
should avoid contact with the veterinary medicinal product.
To avoid accidental ingestion, the product must be used out of sight of children and
stored out of sight and reach of children. Always replace unused tablets back into
container and replace the cap securely after use.
In case of accidental ingestion, seek medical advice immediately and show the
package leaflet or the label to the physician.
This product can cause skin-irritation. Avoid prolonged exposure to product. Wash
hands after use.
This product can cause eye-irritation. In the event of accidental eye contact, rinse
immediately with plenty of water and seek medical attention if irritation occurs.
Care should be exercised in administering the product with other sympathomimetic
drugs, anticholinergic drugs, tricyclic antidepressants or specific type B monoamine
oxidase inhibitors.
Do not store above 30°C.
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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