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• Lactulose

  Lactulose is used off label and is given by mouth to treat high blood ammonia levels and constipation in dogs, cats, birds, and reptiles. The most common side effects are diarrhea, bloating, gas, and abdominal cramping. Do not use in pets that are allergic to it or in pets with intestinal blockage/obstruction.

• Lanthanum

  Lanthanum is a phosphorus binding agent used to treat high blood phosphorus levels due to kidney disease in cats and dogs. It is used off label (extra label) in veterinary medicine. Lanthanum comes in tablet and powder forms to be given orally.

• Latanoprost Ophthalmic

  Latanoprost (brand names: Xalatan®, Monoprost®, Xelpros®) is used off label to reduce pressure in the eye and treat glaucoma in dogs and other animals. Latanoprost is applied to the eye as a liquid solution.

• Leflunomide

  Leflunomide is an immunomodulating agent used to treat certain immune-mediated conditions in cats and dogs. It is used off label (extra label) in veterinary medicine. Leflunomide comes in a tablet form that may be specially compounded into a liquid. Wear gloves when handling and do not handle if pregnant or nursing.

• Leuprolide

  Leuprolide is a synthetic hormone used to treat adrenal gland problems in ferrets, gonadal issues in birds, and experimentally treat reproductive issues and incontinence (involuntary loss of bladder and bowel control) in dogs and cats. It is given by injection.

• Levetiracetam

  Levetiracetam (brand names: Keppra®, Elepsia®, Spritam®) is used off label as an anticonvulsant used to treat seizures and epilepsy. In dogs, it is typically used in combination with other anticonvulsants, while in cats, it is used alone or in combination.

• Levobunolol Ophthalmic

  Levobunolol ophthalmic is a topical anti-glaucoma agent used to reduce intraocular pressure (IOP) in glaucoma and to prevent glaucoma from developing in the normal eye of animals with unilateral (one-sided) glaucoma. It is used off label in cats, dogs, and other animals.

• Levofloxacin Ophthalmic

  Levofloxacin ophthalmic is a topical antibiotic used to treat bacterial eye infections in cats, dogs, and other animals. This medication is used off label in veterinary medicine. Levofloxacin ophthalmic comes in liquid drop suspension form.

• Levothyroxine

  Levothyroxine is thyroid hormone replacement given by mouth in the form of a tablet or capsule. It is used to treat hypothyroidism and its use in cats and certain exotic animals is off label. This medication should not be used in pets with certain heart conditions, untreated Addison's disease, or hyperthyroidism.

• Lidocaine/Lidocaine Combinations Topical

  Lidocaine/lidocaine combinations topical are local anesthetics that provide anesthesia (a numbing effect) to the skin in cats, dogs, and other animals. Combination products may contain other local anesthetics, antibiotics or antimicrobials, steroids, antihistamines, and/or cleansing agents.