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1492  Melarsomine (Immiticide, Diroban)                                                          Mesna (Mesnex)



            Generic Name (Brand                                                              Administration/
            Name, Synonyms)   Canine Dosages      Feline Dosages       Adverse Effects/Warnings  Availability
  VetBooks.ir  Melarsomine (Immiticide,   Heartworm infection (class   Do not use in cats.  Pain at injection site and reluctance  Injection. Administer deep
                                                                                              IM strictly following the
             Diroban)
                               1): 2.5 mg/kg deep IM in
                                                                        to move following treatment is
                                                                        common. Other adverse effects
                               the lumbar epaxial muscles
                                                                                              manufacturer’s package insert.
                               twice, 24 hours apart, or as
                               for class 2-3                            include coughing, gagging,   Wear appropriate personal
                                                                                              protective equipment (e.g.,
                                                                        depression, inappetence, fever,
                              Heartworm disease (class 2,               lung congestion, and vomiting.   gloves, gowns, face mask) to
                               3): 2.5 mg/kg deep IM in                 Do not administer to dogs with   protect from exposure.
                               the lumbar epaxial muscles;              caval syndrome. Post-treatment
                               enforce strict rest for 1                thrombotic events are strongly
                               month, then repeat 2 more                correlated with activity. Strict
                               doses 24 hours apart (total of           cage rest should be imposed
                               3 injections)                            for at least 2-4 weeks after
                                                                        treatment.
            Melatonin (Regulin, PrimeX,   Alopecia X: 3-12 mg/DOG PO q   Nocturnal hyperactivity:   Generally very well tolerated. May   Tablets OTC, implants
             Dermatonin)       8-24h, or using the implants   1.5-6 mg/CAT PO before   cause sedation. Implants are
                               8 mg (dogs <9 kg), 12 mg   bedtime       occasionally associated with
                               (dogs 9-18 kg), and 18 mg                injection site reactions.
                               (dogs >18 kg) implanted SQ
                               1-2× yearly as needed
                              Adjunct for immune-mediated
                               blood disorder: 3 mg/DOG for
                               dogs <20 kg, and 6 mg/DOG
                               for dogs >20 kg PO q 12h
            Meloxicam (Metacam,   Antiinflammatory/analgesic   Product bears a black box   Adverse events are similar to other   Tablets, oral suspension,
             Mobic, OroCam)    NSAID: 0.2 mg/kg PO, IV,   warning about use in cats.   NSAIDs and include GI upset,   injection, transmucosal oral
                               or SQ initially, followed by   ISFM and AAFP support low   ulceration, perforation, and renal   solution. Oral forms given
                               0.1 mg/kg PO q 24h  dosing for chronic pain.  toxicity. Do not combine with   with food.
                                                  Chronic antiinflammatory/  other NSAIDs or glucocorticoids.
                                                   analgesic NSAID: 0.1 mg/  Manufacturers state that there
                                                   kg PO initially, followed by   is no known safe dosing of this
                                                   0.05 mg/kg PO q 24h tapered   drug in cats; however, it is often
                                                   to lowest effective dose  used as an analgesic for chronic
                                                                        conditions such as osteoarthritis
                                                                        in cats.
                                                               2
                                           2
            Melphalan (Alkeran)  Antineoplastic: 2 mg/m  PO   Antineoplastic: 2 mg/m  PO q   Use with caution in patients with   Tablets. Cytotoxic, NIOSH-listed
                               q 24h for 2 weeks, then   other day; or 0.1 mg/kg PO q   leukopenia, thrombocytopenia,   hazardous drug and should be
                               2-4 mg/m  PO q 48h; or   24h for 2 weeks, then q 48h  previous radiotherapy, impaired   prepared, administered, and
                                     2
                               0.1 mg/kg PO q 24h for 10                hepatic or renal function.   disposed of in accordance with
                               days, then 0.05 mg/kg PO q               Adverse effects include GI upset,   federal and local requirements.
                                          2
                               24h; or 1.5 mg/m  PO q 24h               pulmonary infiltrates or fibrosis,
                               for 7-10 days; or 7 mg/m  q              and myelosuppression.
                                              2
                               24h for 5 days q 3 weeks
            Memantine (Namenda)  Behavioral disorders:   Use is not described in cats.  Poor evidence for clinical efficacy   Tablets
                               0.3-0.5 mg/kg PO q 12h                   or safety in veterinary patients,
                                                                        though no specific adverse
                                                                        effects described.
            Meropenem (Merrem)  Multidrug-resistant infections:   Multidrug-resistant infections:   Generally well tolerated. Alopecia   Injection. Stable at 50 mg/mL in
                               8.5-12 mg/kg SQ q 12h or   10 mg/kg q 12h SQ, IV  or hair color change may occur   refrigerator for up to 25 days.
                               24 mg/kg IV q 12h; increase              at SQ injection sites. GI upset
                               to q 8h if neutropenia and               and seizures have been reported.
                               pathogen minimum inhibitory              Do not use in animals that have
                               concentration >1                         known allergies to beta-lactam
                                                                        antimicrobials.
            Mesalamine (5-ASA, Asacol,  IBD: 10-20 mg/kg PO q 8h  Use is not described in cats.  Not commonly used in veterinary   Controlled-release capsules
             Pentasa)                                                   medicine.
            Mesna (Mesnex)    Adjunctive therapy to ifosfamide  Adjunctive therapy to ifosfamide   Used as an adjunctive therapy   Injection. Dilute 20 mg/mL
                               for antineoplastic therapy:   for antineoplastic therapy:   with ifosfamide administration   before administration at 20%
                               Give mesna at 20% of the   Give mesna at 20% of   and saline diuresis to prevent   of ifosfamide dose.
                               ifosfamide dose as an IV   the ifosfamide dose as   hemorrhagic cystitis.
                               bolus initially with ifosfamide   an IV bolus initially with
                               infusion; repeat at 2 and 5   ifosfamide infusion; repeat
                               hours after the ifosfamide   at 2 and 5 hours after the
                               infusion. Treatment is   ifosfamide infusion. Because
                               repeated q 3 weeks.  the dose of ifosfamide is
                                                   significantly greater for cats,
                                                   the dose of mesna will also
                                                   be comparatively larger.
                                                   Treatment is repeated q 3
                                                   weeks.

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