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  • Hydrocodone with homatropine oral is a combination antitussive (cough suppressant) oral medication used to treat coughing in dogs. It contains an opiate narcotic (hydrocodone) and an anticholinergic (homatropine). It is used off label (extra label) in veterinary medicine.

  • Hydrocortisone aceponate otic (brand name Cortotic) is a corticosteroid anti-inflammatory drug used to treat inflammation in the external ear canal (otitis externa) in dogs. It may be used off label in other animals. Hydrocortisone aceponate otic comes in spray form.

  • Hydrocortisone aceponate topical (brand name Cortavance) is a topical steroid used to treat skin inflammation and itch in dogs. It may be used off label in other animals. Hydrocortisone aceponate topical comes in spray form.

  • Hydrocortisone ophthalmic is a topical steroid medication used to treat surface inflammation in the conjunctiva of the eye in cats and dogs, usually in combination with other eye medications. Hydrocortisone ophthalmic comes in ointment and liquid drop form.

  • Hydrocortisone otic is a steroid medication used to treat topical inflammation of the ears in pets. It is often combined with antibiotics and comes as a liquid solution applied within the ear canal.

  • Hydrocortisone topical is a medication applied to the skin that comes in many forms such as creams, ointments, shampoos and sprays, and is used to treat itchiness and inflammation. Side effects may include irritation at the application site, and with long-term use, can include thin skin, skin bumps, and blackheads. Use this medication with caution in pregnant pets or in pets with skin tuberculosis.

  • Hydrogen peroxide 3% oral is a topical antiseptic that has been used orally, off label, to induce vomiting at home in dogs and ferrets. It has been used when immediate induction of vomiting is required and timely transportation to the veterinary clinic is not possible or when other emetics are not available. Follow your veterinarian's administration directions very carefully, as risks of adverse effects are high.

  • Hydroxyurea is given by mouth and is used off label to treat certain cancers in cats and dogs. Common side effects include bone marrow suppression, lack of appetite, vomiting, diarrhea, mouth and stomach ulcers, loss of toenails and/or hair coat.

  • Hydroxyzine (brand names: Atarax®, Vistaril®, Masmoran®, Multipax®) is an antihistamine used off label in cats, dogs, horses, and birds to treat allergic and itchy conditions. It can also be used as a sedative/tranquilizer. Hydroxyzine is given by mouth in the form of a tablet, liquid solution, or capsule. It may also be given as an injection in the hospital.

  • Hygromas are fluid-filled, non-painful swellings that develop suddenly over a bone that sticks out (bony prominence). They are the body's reaction to repetitive trauma and usually a result of laying too frequently on hard surfaces.