Diphenist is a clear, sterile injectable solution containing 50 mg/mL diphenhydramine hydrochloride in Water for Injection. Each 1 mL single-use vial is preservative-free. The product is labeled for intramuscular, intravenous, or topical administration. DIN 02219336; available without a prescription in Canada (prescription required in Quebec).
Diphenist
Diphenist
Diphenist is a clear, sterile injectable solution containing 50 mg/mL diphenhydramine hydrochloride in Water for Injection. Each 1 mL single-use vial is preservative-free. The product is labeled for intramuscular, intravenous, or topical administration. DIN 02219336; available without a prescription in Canada (prescription required in Quebec).
About This Item
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Pet Health Benefits
Every product we carry at PetMeds Direct is selected with care to support your pet's health from nose to tail.
Pain Relief
Vet-approved medications to reduce inflammation and ease joint or post-surgery pain
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Dermatology products and omega-rich formulas promote healthy skin and a shiny coat
Happy Pet Parents
Not sure how to get started with PetMeds Direct? We make caring for your pet easier than ever — whether it's managing prescriptions, stocking up on supplements, or getting expert advice. Explore below for helpful ways pet parents use PetMeds Direct to stay on top of their pets' health. At PetMeds Direct, we're proud to serve pet lovers all across Canada.
🐾 Marcus L. - Toronto, ON
"From ordering to delivery, everything was seamless. I even got a helpful reminder email about my dog's monthly flea prevention. PetMeds truly cares about our pets!"
🐶 Jenna R. – Vancouver, BC
"I'm so glad I found PetMeds Direct. They handled everything with my vet directly, and my dog's prescription arrived at my door in just two days."
🐱 Amy Allen - Calgary, AB
"As a cat mom managing ongoing medication, PetMeds has been a total game-changer. They make refills automatic, and I always get a heads-up before anything ships. So reliable!"
About PetMeds Direct
PetMeds Direct was founded with one simple mission: to make pet healthcare easier, faster, and more compassionate for Canadian pet parents. What started as a small idea — helping busy families manage their pets’ prescriptions — has grown into a trusted nationwide pharmacy serving dogs, cats, and everything in between. We believe pets are family, and every tail wag and purr deserves top-tier care. That’s why we work closely with vets, offer fast shipping, and make prescriptions and wellness products more accessible than ever. At PetMeds Direct, we’re not just delivering meds — we’re delivering peace of mind.
Healthy Pets, Happy Homes
Caring for your pet’s health has never been easier. With just a few clicks, PetMeds Direct delivers trusted medications and wellness products right to your door — fast, affordable, and vet-approved. Say goodbye to last-minute pharmacy runs and hello to peace of mind.
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