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Diphenhydramine Capsules

This product requires a veterinary prescription.
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Diphenhydramine Capsules
Product Information
Diphenhydramine is an antihistamine used to prevent allergy symptoms or relieve insect bites, stings and other causes of itching. 
Dogs and Cats
Generic Name
Brand Names
Drug Class
Antihistamine, First Generation
Product Description & Form
*Capsule size, color, shape, markings, or coating may be different from description. Diphenhydramine is a generic medication, and therefore we may have different manufacturers at any given time. Capsules may vary in appearance. 
Current Manufacturer: Major
Diphenhydramine 50 mg Capsules 100 ct: 14 mm, pink capsule, not scored, imprinted with CPC;836. (NDC 00904-2056-61, 00904-5307-60)
  • Used to stop allergy itching, prevent motion sickness, as a mild sedative and treat muscle tremors due to certain toxins or medications
  • May be used for its sedative effect to calm an animal
Active Ingredients
Diphenhydramine hydrochloride
Inactive Ingredients
D&C Red No 28, FD&C Blue No 1, FD&C Red No 40, gelatin, lactose monohydrate, corn starch. (NDC 00904-2056-61, 00904-5307-60)
Diphenhydramine should be given orally as directed by your veterinarian.
Missed Doses
Give 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 2 doses at once.
Side Effects
Side effects may include drowsiness, dry mouth, urinary retention, diarrhea, vomiting and lack of appetite. Drowsiness may diminish over time. Notify your veterinarian if these effects are troublesome and continue.
Other side effects may occur. If you notice anything unusual, contact your veterinarian.
Drug & Food Interactions
The following drugs can potentially interact with diphenhydramine: other CNS depressants, heparin, warfarin, and epinephrine. Contact your veterinarian if your pet experiences any unusual reactions when different medications are given together.
Make sure to tell your veterinarian what other medication you are giving to your pet. Quite often your veterinarian may prescribe two different medications, and a drug interaction may be anticipated. In this case, your veterinarian may vary the dose and/or monitor your pet more closely. 
This medication does not have an FDA approved indication for use in animals, but it is a common and acceptable practice for veterinarians to prescribe this human medication for use in animals.
Keep out of reach of children. This medication should not be used in pregnant or nursing animals.
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, call your veterinarian immediately or go to a veterinary emergency clinic. Symptoms may include but are not limited to: swollen lips, tongue, face, airways; difficulty breathing; agitation; profuse salivation; vomiting; widespread hives and itching.
Adverse Reactions
If you are concerned that your pet has experienced an adverse reaction to this medication, please contact Vetsource customer service at 877-738-4443.
Store at 68°F to 77°F in controlled room temperature, excursions permitted between 59° to 86°F. Keep this medicine out of reach of children. Store in a childproof container. Store this medicine in a cool, dry place at room temperature. Store away from heat and direct sunlight. Do not store this medicine in the bathroom, near the kitchen sink or in damp places. The medicine may break down if exposed to heat or moisture.
Sourced directly from the manufacturer or their approved distributor. Guaranteed genuine product backed by the manufacturer.


Nutritional Info