PRN® Pharmacal

Proin® Chewable Tablets

PRN® Pharmacal
$39.13 - $145.74
 
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Description
Product details
Proin Chewable Tablets contain phenylpropanolamine, a sympathomimetic amine primarily used to control urinary incontinence (leakage) in dogs. This product is a chewable, immediate-release tablet formulation (not extended-release).
  • FDA-approved for the control of urinary incontinence due to urethral sphincter hypotonus in dogs.
  • Proprietary flavored tablets are scored for precise dosing.
  • This medication may cause increased thirst; ensure your pet always has access to fresh, clean drinking water while taking this medication.
  • Safe use of this medication has not been evaluated in dogs used for breeding, during pregnancy, or in lactating dogs. Consult your veterinarian prior to use if your pet is in one of these groups.
  • Do not use this medication within at least 2 weeks of a monoamine oxidase inhibitor (MAOI), including amitraz, an ingredient in certain flea and tick collars.

Proin (phenylpropanolamine) is a controlled substance in the following states: AR, IA, LA, MS, WV.
All electronically prescribed orders shipping to these states will require secondary verbal or faxed authorization from the prescriber prior to dispensing this medication.
The following states require the pet owner’s date of birth to be on file prior to dispensing: AR, LA, MS, WV.

Product sourced directly from the manufacturer or their approved distributor. Guaranteed genuine product backed by the manufacturer.



For
Dogs

Active ingredient(s)
Phenylpropanolamine hydrochloride

Inactive ingredients
Complete inactive ingredients list not provided by manufacturer.

Brand name
Proin Chewable Tablets

Drug class
Sympathomimetic amine

Product flavoring
Proin Chewable Tablets are poultry liver flavored.
*Contains hydrolyzed chicken, soy, yeast

Manufacturer
PRN Pharmacal

Product strength & size
Proin Chewable Tablets may be available in multiple strengths and/or sizes. Please ensure the selected product and package size are appropriate for your pet, as recommended by your veterinarian.
For current availability, please refer to the product selection above.



Usage
*For complete product information, please review the full prescribing information in the manufacturer package insert.

Proin Chewable Tablets should be given orally as directed by your veterinarian. Please consult your veterinarian before making any changes or discontinuing the prescribed dosing schedule.
Proin Chewable Tablets are scored, and the dosage should be calculated in half-tablet increments.
Ensure your pet always has access to fresh, clean drinking water while taking this medication.

Missed doses
Administer the dose as soon as possible. If it is almost time for the next dose, skip the missed dose and continue with the regular schedule. Do not give more medication than prescribed or two doses at once.

Storage
Store in a cool, dry place at a controlled room temperature (68 to 77°F, excursions permitted between 59 and 104°F). Keep in a secure location out of the reach of children and pets. Protect from light and moisture.
Exposure to extreme temperatures or moisture may affect the integrity and effectiveness of medications. Always store medications properly (e.g., away from the bathroom, kitchen sink, or other damp places).



Side effects
The most common side effects of this medication include (but may not be limited to) increased thirst, vomiting, diarrhea, decreased appetite, lethargy, and restlessness.
Your veterinarian may advise a lower initial dose and gradually increase over time to help find an appropriate dosage and avoid these effects.

Contact your veterinarian immediately if your pet experiences complete loss of appetite, significant weight loss, seizures or collapse, abnormal gait (difficulty walking), extreme behavioral changes (e.g., anxiety, irritability, or aggression), vocalization, or if your pet displays any signs of an extreme increase in blood pressure (including disorientation, decreased coordination, blood in the urine, bloody nose, or sudden blindness).

Notify your veterinarian if your pet experiences any of the effects described above, or if you notice any other side effects that are persistent or troublesome.
If you notice anything unusual, please consult your veterinarian.

Precautions
*For complete product information including warnings and precautions, please refer to the manufacturer package insert.

For oral use in dogs only- not for human use. Keep out of reach of children. Consult a physician in case of accidental ingestion by humans.
PROIN may cause increased thirst; therefore, provide ample fresh water.
Overdose has been associated with dogs chewing through closed bottles of PROIN and consuming multiple tablets. Therefore, it is important to store PROIN Chewable Tablets out of reach of dogs and other pets in a secure location.
PROIN may mask signs of incontinence due to a urinary tract infection. PROIN is not effective in dogs with incontinence due to neurologic disease or malformations.
PROIN may cause hypertension; therefore, use with caution in dogs with preexisting heart disease, hypertension, liver disease, kidney insufficiency, diabetes, glaucoma, and conditions with a predilection for hypertension (e.g., hyperthyroidism). Use with caution in dogs receiving sympathomimetic drugs, tricyclic antidepressants, or monoamine oxidase inhibitors as increased toxicity may result.
Because this medication should NOT be used within at least 2 weeks of any monoamine oxidase inhibitor (e.g., selegiline, amitraz), it is NOT compatible with flea and tick collars that contain amitraz as an active ingredient. If your pet is currently using one of these collars, consult your veterinarian before starting this medication.
The safe use of PROIN has not been evaluated in dogs that are intended for breeding, or that are pregnant or lactating. Discuss the risks of using this medication with your veterinarian prior to use if your pet is in one of these groups.

Do not administer to animals with a known history or suspected allergy/hypersensitivity to this medication or any of its ingredients. Allergic reactions to medications may occur. Be sure to inform Vetsource and your veterinarian if your pet has any known drug sensitivities or allergies.
If your pet displays symptoms of an allergic reaction, discontinue therapy and call your veterinarian immediately or seek emergency veterinary attention. Symptoms may include (but are not limited to): swollen lips, tongue, face, or airways; difficulty breathing; agitation; profuse salivation; and widespread hives or itching.

Drug and food interactions
The following drugs* may have potential interactions with this medication: alpha-1 antagonists (e.g., prazosin), inhaled anesthetics (e.g., isoflurane), antidiabetic agents (including insulins), aspirin, blood pressure medications (e.g., amlodipine, enalapril, telmisartan), digoxin, estriol (Incurin), MAOIs (e.g., amitraz, selegiline), oxytocin, phenothiazines (e.g., acepromazine), potassium citrate, sotalol, concurrent sympathomimetic agents (e.g., albuterol), and tricyclic antidepressants (e.g., amitriptyline, clomipramine).
*NOTE: this may not be a comprehensive list. Contact your veterinarian if your pet experiences any unusual reactions when different medications are given together.

Please ensure your veterinarian is aware of all medications and supplements that your pet is currently receiving. Your veterinarian may prescribe multiple medications, even if a potential drug interaction may occur. In these instances, your veterinarian may adjust the dosages or monitor your pet more closely.

Adverse reactions
If you are concerned that your pet has experienced an adverse reaction to this medication, please contact the manufacturer PRN Pharmacal at 850-476-9462 Vetsource Pet Owner Care at 877-738-4443.

Overdose
If you have any reason to suspect an overdose, call your doctor/veterinarian or the appropriate poison control resource immediately.

For humans:
The national toll-free Poison Help line, 1-800-222-1222, will connect you to your local poison center in case of emergency. This service is available nationwide and in most U.S. territories.

For animals:
The ASPCA Animal Poison Control Center is available 24 hours a day, 365 days a year at 888-426-4435.
Pet Poison Helpline® also provides a 24/7 animal poison control service at 855-764-7661.

*Please note: this information is for third-party services and is provided for convenience in case of potential poison-related emergencies. There may be consultation fee for these services.

Disclaimer
The content provided on this page is NOT medical advice.
All content, including the images and product description above, is intended for general informational purposes only and should not be considered a substitute for professional veterinary consultation, diagnosis, or treatment.
Consult your veterinarian for complete information about this product and how it fits into your pet's individual treatment plan.


Last revised: 12/04/2025
$39.13 - $145.74