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• Pentosan Polysulfate Sodium

  Pentosan polysulfate sodium (brand name: Cartrophen) is a disease modifying osteoarthritis drug (DMOAD) used to treat noninfectious and traumatic arthritis in dogs and used off label (extra label) in cats. It is given as a series of 4 subcutaneous injections and may be repeated up to 3 times per year.

• Pentoxifylline

  Pentoxifylline (brand names: Trental®, PTX) is used to treat certain immune-mediated skin conditions and inflammation of the blood vessels that lead to poor blood flow, including ear margin dermatitis and cutaneous lupus in dogs, and navicular disease in horses. Its use in cats, dogs, and horses to treat skin and vessel disease is off label (extra label).

• Perna

  Perna (extract brand names: Lyprinol and Antinol) is a supplement made from the green-lipped mussel (Perna canaliculus) and is used as an antioxidant and anti- inflammatory for conditions like arthritis in cats, dogs, and horses. This supplement comes in capsule, powder, or chewable tablet forms.

• Pet-Tinic

  Pet-Tinic® is a liquid dietary supplement for dogs and cats that contains iron, copper, and essential vitamins (thiamine, riboflavin, niacin, vitamin B6, and vitamin B12).

• Phenobarbital

  Phenobarbital is given by mouth or as an injection to treat seizures or to sedate your pet. Common side effects include sleepiness, increased thirst, urination, and/or appetite. Do not use this medication in pets with liver, lung, or kidney disease or those that are allergic to barbiturates. If a negative reaction occurs, call your veterinary office.

• Phenoxybenzamine

  Phenoxybenzamine is used off label in dogs and cats to treat urination difficulty related to sphincter tone, high blood pressure related to pheochromocytoma, and in horses to treat laminitis. Give phenoxybenzamine as directed by your veterinarian.

• Phenylpropanolamine

  Phenylpropanolamine (brand names: Proin®, Propalin®, Cystolamine®, Uricon®, Uriflex-PT®) is a sympathomimetic medication used in dogs and cats to treat urinary incontinence due to poor muscle tone in the urethral sphincter. It is off-label in cats.

• Pheromones

  Pheromones (brand names Feliway, Comfort Zone, Adaptil, others) are natural or synthetic substances that mimic scents animals release to communicate. Pheromones are used in cats and dogs as behavior modifiers for a variety of conditions, including urine spraying and marking, inter-cat aggression, stressful events, phobias, and separation anxiety.

• Phytonadione (Vitamin K1)

  Phytonadione, also called vitamin K1 (brand names: Mephyton, Phytomenadione, Aqua-Mephyton, K-Caps, Konakion, Hemophyt) is a vitamin supplement used in cats, dogs, horses, birds, and rabbits as an antidote to anticoagulant rodenticide, sweet clover, dicumarol, and sulfaquinoxaline toxicities. It is also used to treat bleeding disorders.

• Phytosphingosine Topical

  Phytosphingosine topical (brand names Douxo®, SkinGuard®) is an anti-inflammatory agent, with antibacterial and antifungal properties. It is used in cats and dogs to help relieve itching in certain skin conditions and help restore the skin barrier. Phytosphingosine topical may be part of a combination product.