| Cat Formulary - VetInfo | ||||
| All medications to be given orally unless otherwise noted. IM = intramuscular injection; IP = intraperitoneal injection; SC = subcutaneous injection; IV = intravenous injection | ||||
| Drug | Available Formulations | Indication | Dosage | Major Precautions /Notes |
| acemannan | Acemanan Rx | 2mg/kg IP or SC per week x 6 weeks | we do not use this medication in our practice | |
| acepromazine | PromAce Rx, generics; 10mg/ml inj., 2mg, 5mg, 10mg tablets | 1) Sedation, car sickness 2) Preanesthesia | 1) up to 1mg/lb, lower dosages often work well 2) 0.01 to 0.02mg/lb | |
| acetaminophen | Tylenol Rx | NONE | Never administer acetaminophen to cats! | |
| acetazolamide | Diamox 125mg, 250mg | glaucoma | 4-8mg/kg every 8 to 12 hours | |
| acetylcysteine | Mucomyst Rx | 1) Tylenol toxicity 2) eye ulcers | 1) 140mg/kg followed by 70mg/kg q4hrs x 5 doses 2) 2% solution topically q2hr | |
| Adequan (polysulfated-glycosaminoglycan) | 100mg/ml | arthritis, chronic cystitis | 4.4mg/kg IM | usually given weekly for 5 doses then every 3 weeks |
| albendazole | Valbazen 113.6mg/ml suspension | 1) coccidia 2) giardia | 1) 25-50mg/kg every 12hr x 3 days 2) 25mg/kg every 12hr x 2 days | |
| albuterol | Ventolin or Proventil 2,4,5mg tablets, 2mg/5ml syrup | 20-50ug/kg every 6 hrs | may use 100ug/kg for brief periods; available in inhalant form | |
| aluminum carbonate gel | Basalgel 500mg capsules | 10 to 30 mg/kg with meals or every 8 hrs | ||
| aluminum hydroxide | Amphojel 64mg/ml oral suspension, 600mg tablet | 10-30mg/kg with meals or every 8 hrs. | ||
| amikacin | Amiglyde-V, generics 5mg/ml injection | 5mg/kg SC or IV | Use with caution in cats, causes kidney failure in some patients | |
| aminopentamide | Centrine, 0.2mg tablet, 0.5mg/ml injection | vomiting | 0.1mg/cat every 8 to 12 hours | not very effective |
| aminophylline | generics | bronchodilation | 6.6mg/kg every 12 hrs | |
| amitraz | Mitban | demodectic mange | use 1/2 of dog strength (10.6ml per 4 gal water) | |
| amitriptyline | Elavil, 10mg, 25mg, 50mg tabs | 1) painful urination 2) inappropriate urination | 1) 5mg to 10mg/cat once daily at night 2) 1 to 2mg/kg every 12 hrs | |
| amlodipine | Norvasc | high blood pressure | 2.5mg tablets | 0.625mg (1/4th tab) every 24hrs, may give up to 1.25mg/day if necessary |
| ammonium chloride | generics | urinary acidification | 800mg/cat (around 1/4th tsp usually) | mix with food |
| amoxicillin | Amoxi-Tabs, Amoxi-Drops, others; 50mg, 100mg tabs, 50mg/ml oral suspension | antibiotic | 10mg/lb every 12 hours | |
| amoxicillin/clav-ulanic acid | Clavamox, 62.5mg/ml oral suspension, 62.5mg, 125mg tabs | antibiotic | 62.5mg every 8 to 12 hours per cat | |
| ampicillin | generics | antibiotic | 10mg/lb | |
| amprolium | Corid; 20% powder, 9.6% solution | coccidia | approximately 1.25gm/day | |
| aspirin | generics, 81mg tablets | 1) inflammation 2) platelet inhibition in cardiomyopathy | 1) 10 to 20mg/kg every 48hrs 2) 81mg every 48hrs | some dosing schedules call for every 72 hr use since aspirin can be toxic to cats |
| atenolol | Tenormin; 25mg, 50mg tablets, 25mg/ml oral suspension | 1) heart arrhythmia's 2) hypertension | 6.25 to 12.5mg/cat every 12 hrs | |
| aurothioglucose | Solganol 50mg/ml injection | immune mediated diseases | 0.5 to 1mg/cat every 7 days (intramuscular injection) | |
| azathioprine | Imuran; 50mg tablets | immune mediated diseases | 1mg/kg every 48hrs | use in cats carries a high risk for liver failure |
| azithromycin | Zithromax, 1gm packets for suspension, 250mg tablets | chronic upper airway disease | 5mg/kg daily for 3 days, then every 2 to 3 days | mixing partial packets is acceptable if measured carefully |
| AZT | Retrovir; 10mg/ml syrup | Feline immuno- deficiency virus | 15mg/kg every 12 hr (higher dosages have been used) | It is considered best to use this for 3 weeks or less |
| Benazepril | Lotensin; 5mg, 10mg tablets | high blood pressure | 0.25 to 0.5mg/kg every 24 hrs | |
| bethanechol | Urecholine; 5mg tablets | 1.25 to 5mg/cat every 8 hours | ||
| bismuth subsalicylate | Pepto-Bismol; 262mg/15ml | 1ml/kg every 8hrs | Use regular strength only; use with caution due to salicylates | |
| buspirone | Buspar; 5mg and 10mg tablets | 1) urine marking 2) aggression | 2.5 to 5mg/cat every 12 to 24 hours | NOTE: often given to the cat being attacked when used for aggression and may cause increase in this cat's aggressive tendencies |
| butorphanol | Torbutrol; 1, 5 and 10mg tablets | 1) coughing 2) pain relief | 1) 0.55mg/kg every 6 to 8 hrs 2) 1.5mg/kg every 4 to 6 hours | only moderately effective for pain relief |
| calcitriol | Rocaltrol | chronic renal failure | 2.5 to 3ng/kg every 24 hrs note that this is nanograms/kg | dosage depends on calcium and phosphorous levels, usually must be formulated by compounding pharmacies, controversial effectiveness |
| calcium carbonate | Tums, generics, available calcium varies | dietary requirements, phosphate binder | 60 to 100mg/kg per day | |
| calcium lactate | generics | dietary requirements | 0.2 to 0.5gm/cat/day | usually given in divided doses with meals |
| captopril | Capoten; 25mg tablet | 3.12 to 6.25mg/cat every 8 hours | ||
| carbenicillin | Geocillin; 500mg tablet | antibiotic | 10mg/kg every 8 hours | |
| carimazole | Neo-mercazole | hyperthyroidism | 5mg/cat every 8 hrs first week, then every 12 hrs | not available in the United States, available in Europe |
| carprofen | Rimadyl | The formulations available in the US should not be used in cats | ||
| cascara segrada | Nature's Remedy; 100mg tablets | constipation | 1 to 2mg/kg/cat/day | |
| castor oil | generics, 100% solution | 4 to 10ml/day | ||
| cefaclor | Ceclor; 25mg/ml oral suspension | antibiotic | 4 to 20mg/kg every 8 hrs | |
| cefadroxil | Cefa-Tabs; 50mg, 100mg; Cefa-Drops 50mg/ml | antibiotic | 22mg/kg every 12 to 24 hours | |
| cefixime | Suprax | 1) general antibiotic 2) urinary tract infections | 1) 10mg/kg every 12 hrs 2) 5mg/kg every 12 to 24 hours | |
| cephalexin | Keflex, generic | antibiotic | 10 to 15mg/lb every 12 hours | |
| chlorambucil | Leukeran; 2mg tablet | 0.1 to 0.2mg/kg every 48hrs | may start with every 24hr usage | |
| chloramphenicol | generics; 30mg/ml oral suspension, 250mg capsules | antibiotic | 12.5 to 25mg/kg every 12 hours | handle cautiously, minor exposure can be toxic to humans |
| chlorothiazide | Diuril; 50mg/ml oral suspension | diuretic | 20-40mg/kg every 12 hours | |
| chlorpheniramine maleate | Chlortrimeton, generics; 4mg tablets | antihistamine | 2mg/cat every 12 hours | |
| cimetidine | Tagamet; 100, 200, 300mg tablets | 1)ulcers 2)gastrointestinal protectant | 1)10mg/kg every 8 hrs 2) 2.5 to 5mg every 12 hours | |
| cisapride | Propulsid; 10mg tablet | megacolon, constipation | 2.5 to 5mg/cat every 8 to 12 hours | available from compounding pharmacies |
| clindamycin | Antirobe; 25mg capsules, 25mg/ml syrup | antibiotic, 1)commonly used for oral infections 2)anaerobic infections 3) toxoplasmosis | 1) 5.5mg/kg every 12 hrs or 11mg/kg every 24 hours 2) 11mg/kg every 12hrs or 22mg/kg every 24 hrs 3) 12.5mg/kg every 12 hours | |
| clofazimine | Lamprene; 50mg and 100mg capsules | 1mg/kg every 24 hours but do not exceed 4mg per day | ||
| clomipramine | Clomicalm (veterinary), Anafranil (human), 5, 10mg tablets | behavioral disorders | 1 to 5mg per cat every 12 to 24 hours | |
| clonazepam | Klonopin, 0.5, 1 and 2mg tablets | 0.5mg/kg every 8 to 12 hours | ||
| clorazepate | Tranxene; 3.75, 7.5, 11.25 and 15mg tablets | 2mg/kg every 12 hours | ||
| cloxacillin | Cloxapen; 25mg/ml oral suspension | anitibiotic | 20 to 40mg/kg every 8 hours | |
| codeine | generics, 15 mg tablets, 5mg/ml syrup, 3mg/ml solution | 1)cough suppressant 2) pain relief | 1) 0.1 to 0.3mg/kg every 4 to 6 hrs 2) 0.5 to 1mg/kg every 4 to 6 hours | narcotics may cause extreme excitement in some cats so must be used cautiously |
| cholchicine | generic, 500ug and 600ug tablets (0.5, 0.6mg) | 0.1 to 0.3mg/kg every 24 hours | not used very often in cats | |
| cyclophos- phamide | Cytoxan; 25 and 50mg tablets | 6.25 to 12.5mg/cat once daily for 4 days, then 3 days off | ||
| cyclosporine (oral) | Sandimmune; 100mg/ml oral solution, 25mg capsules | 4 to 6mg/kg every 12 hours | ||
| cyclosporine ophthalmic | Optimmune 0.2% compounded drops of 1% or 2% in olive or corn oil | ointment: apply a 1/4th inch strip every 12 hours drops: 1 drop every 12 hours | ||
| cyproheptadine | Periactin; 4mg tablet, 2mg/5ml syrup | 1) appetite stimulant 2) asthma | 1) 2mg per cat every 24 hours 2) 1.1mg/kg every 8 to 12 hours | |
| dantrolene | Dantrium; 100mg capsule | 0.5 to 2mg/kg every 12 hours | ||
| dexamethasone | Azium and generics; injection 2mg/ml, 4mg/ml, tablets 0.25mg, 0.5mg, 0.75mg, 1mg, 1.5mg, 2mg, 4mg and 6mg | 1) inflammation 2) shock 3) spinal injury 4) dexamethasone suppression testing | 1) 0.1mg/kg every 24 to 72 hrs 2 and 3) 2.2 to 4.4mg/kg IV 4) 0.1mg/kg IV, take samples pre and 4 and 8hrs post injection | |
| dextrometh- orphan | many forms | cough suppression | 0.5 to 2mg/kg every 6 to 8 hours | most OTC forms make cats salivate profusely |
| diazepam | Valium; 5mg/ml injection, 2mg, 5mg tablets | 1) seizures 2) inappropriate urination 3) appetite stimulant | 1) 0.5mg/kg IV or rectally 2) 2mg/cat every 12 hours 3) 0.2mg/kg IV (less often works) | diazepam can cause sudden severe liver failure in cat in rare cases so it should be used cautiously |
| dichlorphen- amide | Daranide; 50mg tablet | 3 to 5mg/kg every 8 to 12 hours | ||
| dichlorvos | Task; 10mg and 25mg tablets | deworming (hook, round, whip worms) | 11mg/kg | organophosphate |
| diethylstilbestrol (DES) | only available through compounding pharmacies | urinary incontinence | 0.05 to 0.1mg/cat every 24 hours or longer based on effect | |
| difloxacin | Dicural; 11.4, 45.4 and 136mg tablets | antibiotic (fluoroquinolone class) | 5 to 10mg/kg once a day | |
| digoxin | Lanoxin, Cardoxin; 0.0625, 0.125, 0.25mg tablets, 0.05 and 0.15mg/ml elixir | 0.08 to 0.01mg/kg every 48hrs | ||
| diltiazem | Cardizem; 30mg tablets | |||
| dimhenhydrinate | Dramamine; 50mg tablets | 12.5mg/cat every 8 hours (1/4th tablet) | ||
| diphenoxylate | Lomotil; 2.5mg tablets | to control diarrhea | .0.5 to 0.1mg/kg every 12 hours | |
| ducosate (dioctyl-sodium- suflosuccinate, DSS) | many OTC brands | stool softener | 50mg/cat every 12 to 24 hours | do not use at the same time as any mineral oil or petrolatum based product |
| doxycycline | generics; 50mg capsules, 100mg capsules or tablets; 10mg/ml oral suspension | antibiotic | 3 to 5mg/kg every 12 hours or 10mg/kg every 24 hours | Give at least 6cc of water immediately after administering capsules or tablets |
| enalapril | Enacard, Vasotec; 2.5mg, 5mg, 10mg tablets | hypertension | 0.25 to 0.5mg/kg every 12 to 24 hours | most commonly used once daily |
| enrofloxaxin | Baytril; 5.7mg, 22.7mg tablets | antibiotic | 5 to 20mg/kg/day | may cause blindness when given at higher dosages, 5mg/kg every 12 hours not likely to cause this |
| Epsiprantel | Cestex; 12.5mg, 25mg tablets | kills tapeworms | 12.5mg once for cats <9 lbs, 25mg once for cats 9+ lbs. | can use 2.75mg/kg dosing if necessary |
| erythromycin | generics; 250mg tablet | antibiotic | 10 to 20mg/kg every 8 to 12 hrs | may cause vomiting |
| etretinate | Tegison; 10 and 25mg capsules | 2mg/kg/day | ||
| famotidine | Pepcid AC; 10mg tablet | GI protectant | 0.5mg/kg every 12 to 24 hours | usually used once daily in cats |
| fenbendazole | Pancur Granules 22.7:; 100mg/ml liquid | dewormer | 50mg/kg/day for 3 days | |
| fentanyl transdermal patch | Duragesic; 25ug size | pain relief | Apply 1 patch every 5 days | good pain reliever for post surgical pain |
| ferrous sulfate | OTC | iron supplement | 50 to 100mg/cat every 24 hours | |
| florfenical | Nuflor injectable; 300mg/ml | antibiotic | 22mg/kg every 12 hours of the injectable liquid given orally | |
| fluconazole | Diflucan; 50mg, 100mg tablets | antifungal | 50mg/cat every 12 to 24 hours | usually given once daily |
| flucytosine | Ancobon; 75mg/ml oral suspension | 25 to 50mg/kg every 6 to 8 hours | ||
| fludrocortisone | Flurinef; 0.1mg tablets | hypoadrenocorticism | 0.1 to 0.2mg/cat every 24 hours | |
| fluoroscein dye | use the strips for eye staining, put 3 to 6 strips in a capsule | to differentiate which cat is urinating inappropriately in a group | give 1 capsule of strips and watch for green urine or fluorescent urine with a black light | |
| fluoxetine | Prozac; 10mg and 20mg capsules, 4mg/ml oral solution | behavioral disorders | 1mg/kg every 24 hours, usually no more than 5mg/cat/day | |
| furosemide | Salix; 12.5mg, 50mg tablets | diuretic | 1 to 4mg/kg up to three times a day | water intake must not be restricted when using diuretics |
| gemfibrozil | Lopid; 300mg capsules | 7.5mg/kg every 12 hours | ||
| glipizide | Glucotrol; 5mg and 10mg tablets | diabetes mellitus | 2.5 to 7.5mg/cat every 12 hours | usually start with 2.5m/cat, average dose 5mg/cat |
| glucosamine- chondroitin | Cosequin, many OTC brands; 500mg/400mg tablets | arthritis | 1/2 to 1 tablet per day | |
| glyburide | Glynase, others; 1.25mg, 2.5mg and 5mg tablets | 0.2mg/kg every 24 hours | ||
| glycerin | generic oral solutions | 1 to 2mg/kg every 8 hours | ||
| griseofulvin, microsize | Fulvicin U/F; 125mg, 250mg, 500mg tablets, 25mg/ml oral suspension and 125mg/ml oral syrup | ringworm | 50mg/kg every 24 hours | |
| griseofulvin, ultramicrosize | Fulvicin P/G; GrisPEG; 100mg, 125mg, 165mg, 250mg, 330mg tablets | ringworm | 15mg/kg every 12 hours (30mg/kg/day) | |
| hydralazine | Apresoline; 10mg tablet | 2.5mg/cat every 12 to 24 hours | ||
| hydrochlor- thiazide | HydroDiuril; 25mg, 50mg tablets, 10 and 100mg/ml oral solution | diuretic | 2 to 4mg/kg every 12 hours | |
| hydrocortisone | Cortef; 5mg, 10mg and 20mg tablets | 1)corticosteroid replacement therapy 2) anti- inflammatory | 1) 1 to 2mg/kg every 12 hours 2) 2.5 to 5mg/kg every 12 hours | |
| hydroxyurea | Hydrea; 500mg capsules | 25mg/kg once a day for 3 days of each week | ||
| imipramine | Tofranil; 10mg, 25mg, 50mg tablets | 2 to 4mg/kg every 12 to 24 hours | ||
| interferon alpha | Roferon; 3 million unit vial for injection | immune modulator | 15 to 30U per cat once a day, usually used 7 days on/7off | the injectable solution is diluted and given orally |
| ipecac syrup | to induce vomiting | 2 to 6ml (about 1/4th to 1 teaspoonful) | ||
| isotretinoin | Accutane; 10, 20 and 40mg tablets | 1 to 3mg/kg every 24 hours | ||
| itraconazole | Sporanox; 100mg capsules | fungal infections | 1.5 to 5.0mg/kg every 24 hours | usually the capsules are opened and the contents mixed with butter, then divided equally into appropriate dosages |
| ivermectin | Ivomec, Eqvalan; 10mg/ml solution (oral or injectable) | mange | 0.2 to 0.3mg/kg, once or twice for ear mites or cheyletiella mites, may need to be used for extended periods for demodectic mange | |
| kaopectate | Kaopectate | 1 to 2ml/kg every 2 to 6 hours | ||
| ketoconazole | Nizoral; 200mg tablet, 100mg/ml oral suspension | fungal infections | 5 to 10mg/kg every 8 to 12 hours | |
| ketoprofen | Orudis-KT (OTC); 12.5mg tablet | non-steroidal anti-inflamma- tory medication | 1mg/kg every 24 hours for no more than 5 days | |
| lactulose | Chronulac, Enulose; 10gm/15ml | 1)megacolon, constipation 2) hepatic encephalopathy | 1) 1 to 5ml every 8 to 12 hours as necessary to keep stools soft 2) 2.5 to 5ml/cat every 8 hours | |
| leucovorin | Wellovorin; 5mg, 10mg, 15mg and 25mg tablets, 3 and 5mg/ml solutions | antidote for pyrimethamine (Daraprim Rx) poisoning | 1mg/kg every 24 hours | |
| levamisole | Levasole, Tamisol; 11.7gm/13gm packet | 1) immune stimulant 2) lungworms | 1) 0.5 to 2mg/kg usually every 48 to 72 hours 2) 20 to 40mg/kg every 24 hours for 5 days | |
| levodopa | Larodopa; 100mg tablets | hepatic encephalopathy | 6.8mg/kg first dose, then 1.4mg/kg every 6 hours | |
| levothyroxine | Soloxine, Thyro-Tabs; 0.1mg, 0.2mg tablets | hypothyroidism (usually post therapy for hyperthyroidism) | usually 0.1mg to 0.2mg/cat per day will work but adjust dosage by testing blood levels | |
| lincomycin | Lincocin; 100mg, 200mg tablets | antibiotic | 15 to 25mg/kg every 12 hours | |
| liothyronine (T3) | Cytomel; 60ug tablet | T3 suppression testing for hyperthyroidism | after drawing pre-test blood sample administer 7 doses of approximately 4.4ug/kg every 8 hours then draw blood for post test sample | |
| loperamide | Immodium AD; 2mg tablet, 0.2mg/ml liquid | control diarrhea | 0.08 to 0.16mg/kg every 12 hours | most cats hate the liquid and will foam at the mouth for some time after administration |
| lufenuron | Program; 135mg and 270mg suspension packets, may use equivalent tablets | 1) flea control 2) ringworm | 1) 30mg/kg on the same day each month 2) 80 to 100mg/kg two days in a row, then monthly until cultures are negative | |
| magnesium citrate | Citroma, Citro-Mag | 2 to 4ml/kg | ||
| magnesium hydroxide | Milk of Magnesia | cathartic | 2 to 6ml/cat | |
| magnesium sulfate | Epsom salts | 2 to 6gm/cat | ||
| MCT oil | OTCs | 1 to 2ml/kg/day in food | ||
| mebendazole | Telmintic | dewormer (hooks, rounds, whips) | 22mg/kg with food once a day for 3 days | |
| meclizine | Antivert; 12.5, 25 and 50mg tablets | motion sickness | 12.5mg once a day | |
| megestrol acetate | Ovaban, Megace; 5mg and 20mg tablets | some dermatologic conditions, urine marking that won't respond to other medications | 2.5 to 5mg/cat every 24 hours for one week then increase time between doses to longest effective interval | can induce diabetes and mammary tumors, so use as last resort |
| Metamucil | (psyllium preparations) | fiber source | 1/4th teaspoon once or twice a day mixed with food is most common recommended dosage | |
| metaproterenol | Alupent, Metaprel; 10 and 20mg tablets, 5mg/ml syrup, inhalers | 0.325 to 0.65mg/kg every 4 to 6 hours | ||
| methazolamide | Neptazane; 25 and 50mg tablets | 2 to 6mg/kg every 8 to 12 hours | ||
| methanamine hippurate | Hipres, Urex; 1 gram tablets | 250mg/cat every 12 hours | ||
| methanimine mandelate | Mandelamine; 1 gram tablet, 50 and 100mg/ml suspension | 10 to 20mg/kg every 8 to 12 hours | ||
| methionine (d,l methionine) | Uroeze, MethioForm; several forms | 1 to 1.5 grams/cat mixed in food per day | ||
| methimazole | Tapazole; 5mg and 10mg tablets, compounded to liquids and transdermal prepartions | hyperthyroidism | 2.5 to 15mg/cat every 12 to 24 hours (usually no more than 15mg/day), adjust dosage by evaluation of T4 levels | transdermal preparations usually require lower dosing |
| methocarbamol | Roaxin-V; 500 and 750mg tablets | antidote for permethrin poisoning | 22 to 44mg/kg every 8 hours as necessary to control tremoring | Permethrin is in many OTC spot on flea control products made for dogs |
| methylpred- nisolone | Medrol; 1mg, 2mg, 4mg tablets | corticosteroid | 0.22 to 0.44mg/kg every 12 to 24 hours, use on alternate days for longer term use | |
| methyltestos- terone | Android, generics; 10 and 25mg tablets | 2.5 to 5mg/cat every 24 to 48 hours | ||
| metoclopramide | Reglan; 5mg, 10mg tablets, 1mg/ml oral solution | to control vomiting | 0.2 to 0.5mg/kg every 6 to 8 hours | |
| metoprolol tartrate | Lopressor; 50 and 100mg tablets | 2 to 15mg/cat every 8 hours | ||
| metronidazole | Flagyl, generics; 250mg and 500mg tablets, 50mg/ml suspension | 1) anaerobic infections 2) giardia infection 3) inflammatory bowel disease | 1) 10 to 25mg/kg every 24 hours 2) 17mg/kg every 24 hours for 8 days 3) 5 to 15mg/kg every 24 hours | long term use associated with cancer in laboratory animals |
| milbemycin oxime | Interceptor; 2.3 and 5.75mg tablets | heartworm prevention (approved) | 0.5mg/kg on the same day each month | |
| mineral oil | OTC | 10 to 25ml/cat every 24 hours | mineral oil can be inhaled and causes inhalation pneumonia, so its use is questionable | |
| minocycline | Minocin; 50 and 100mg tablets, 10mg/ml suspension | antibiotic | 5 to 12.5mg/kg every 12 hours | |
| naltrexone | Trexan; 50mg tablet | behavioral disorders | 2.2mg/kg every 12 hours | |
| neomycin | Biosol; 200mg/ml oral suspension | hepatic encephalopathy | 10 to 20mg/kg every 6 to 12 hours | |
| nitroglycerin ointment | Nitrol, generics; 2% ointment | 2 to 4mg topically (around 1/4th inch strip) every 12 hours | ||
| orbifloxacin | Orbax; 5.7, 22.7mg tablets | antibiotic, fluoroquinolone | 2.5 to 7.5mg/kg every 24 hours | |
| oxacillin | generics; 250mg capsules, 50mg/ml oral solution | antibiotic | 22 to 44mg/kg every 8 hours | |
| oxazepam | Serax; 15mg tablets | appetite stimulant | 2.5mg/cat | once daily use is probably best, if possible |
| oxytetracycline | generic; 250mg tablets | antibiotic | 20 to 25mg/kg every 12 hours | |
| paroxetine | Paxil; 10mg tablets | behavioral disorders | 1/8 to 1/4th 10mg tablet once a day | |
| d-penicillamine | Cuprimine; 125mg capsules | heavy metal poisoning antidote | 10 to 15mg/kg | use in cats is somewhat controversial |
| penicillin V | Pen-Vee; 250mg and 500mg tablets | antibiotic | 10mg/kg every 8 hours | rarely used |
| pentoxifylline | Trental; 400mg tablets | 1/4th of a 400mg tablet every 8 to 12 hours | ||
| phenobarbital | generics; 15mg, 30mg, 60mg, 100mg tablets; 4mg/ml oral elixir | seizure control | 2 to 4mg/kg every 12 hours initially, adjust dosage by testing serum levels | |
| phenoxybenz- amine | Dibenzyline; 10mg capsule | 2.5mg/cat every 8 to 12 hours | ||
| piperazine | OTCs, solutions usually 170 or 340mg/ml for pets | kills roundworms | 44 to 66mg/kg | repeat dosage at 2 week intervals |
| piroxicam | Feldene; 10mg capsules | pain relief, cancer therapy | 0.3mg/kg every 48 hours | |
| potassium bromide | only available through compounding pharmacies | seizure control | 30 to 50mg/kg every 24 hours, loading dose usually used when given alone, monitor serum levels to establish long term dosage | |
| potassium citrate | ||||
| potassium gluconate | Tumil-K, Renacare; 2mEq tablets, 2mEq/ 1/4th tsp powder and 2mEq/1/2 teaspoon gel | potassium supplement | 2 mEq per 10 lbs every 12 hours | |
| potassium iodide | 30 to 100mg/cat per day for 10 days | |||
| praziquantel | Droncit; 23 and 34 mg tablets | |||
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