Drug Dosage Calculator for Rabbits

A tool that automatically computes the mean recommended dose and volume of your rabbit's medicine.

Drug Dosage Calculator for Rabbits

Calculator

Select a Drug to Calculate

Click on any drug from the table on the right to calculate the recommended dosage based on your rabbit's weight.

1 Enter rabbit weight above
2 Enter drug concentration (optional)
3 Click a drug from the table

Medical Disclaimer: This calculator is for educational purposes only. Always consult with a qualified veterinarian before administering any medication to your rabbits. Dosages may vary based on individual health conditions.

Drug Reference Database

Click on any drug to calculate dosage. Data compiled from veterinary pharmacology references.

Analgesic & Anti-inflammatory

21 drugs
Drug Name Dose Range Route Frequency Notes
Aspirin
100 mg/kg PO q12-24h Analgesic, antipyretic, anti-inflammator...
Buprenorphine
0.01-0.05 mg/kg SC, IM, IV, TM q6-12h Analgesia, sedation
Butorphanol
0.1-1 mg/kg SC, IM, IV q2-4h Analgesia, sedation
Carprofen
1-2 mg/kg SC, PO q12h Anti-inflammatory, analgesia
Carprofen
2-4 mg/kg SC, PO q24h Anti-inflammatory, anti-endotoxic. Use w...
Fentanyl
0.0074 mg/kg IV Single dose -
Fentanyl CRI
30-100 µg/kg/min CRI Continuous -
Fentanyl Transdermal
25 µg/rabbit TD For 3 days -
Flunixin
1.1 mg/kg PO, SC, IM q12h Anti-inflammatory, analgesic, antipyreti...
Gabapentin
3-10 mg/kg PO q8-12h Analgesia, particularly in cases of neur...
Ibuprofen
2-7.5 mg/kg PO q12-24h Anti-inflammatory, analgesic
Ketoprofen
1-3 mg/kg SC, PO q12-24h Anti-inflammatory, analgesic
Meloxicam
0.2-0.6 mg/kg SC, PO q12-24h Anti-inflammatory, analgesic
Meloxicam
1.5 mg/kg PO q24h for up to 5 days Anti-inflammatory, analgesic. Higher dos...
Meperidine
5-10 mg/kg SC, IM q2-3h Analgesic, antipyretic, anti-inflammator...
Methadone
0.7 mg/kg IV Single dose -
Methadone
0.3-0.6 mg/kg IM Single dose Based on feline doses
Morphine
2-5 mg/kg SC, IM q2-4h Analgesic, antipyretic, anti-inflammator...
Morphine
5-10 mg/kg SC, IM q2-4h Analgesia. Short-term use only, hepatic...
Paracetamol
200-500 mg/kg PO Single dose Analgesic, antipyretic
Tramadol
4.4-11 mg/kg PO q12h Analgesia

Antibiotics

23 drugs
Drug Name Dose Range Route Frequency Notes
Amikacin
2-3 mg/kg SC, IM q8-12h -
Amoxicillin
7 mg/kg SC q24h Injectable only. Not oral due to risk of...
Azithromycin
15-30 mg/kg PO q24h Although there are concerns regarding th...
Cefalexin
20 mg/kg SC q24h -
Cefalexin
11-22 mg/kg PO q8h -
Chloramphenicol
30-50 mg/kg PO q12h AUTHORIZED FOR USE IN RABBITS
Ciprofloxacin
5-20 mg/kg PO q12h -
Doxycycline
2.5 mg/kg PO q12h -
Enrofloxacin
10-30 mg/kg PO, SC, IM q24h -
Enrofloxacin
20 mg/kg PO, SC, IM q24h AUTHORIZED FOR USE IN RABBITS
Florfenicol
25 mg/kg IM, IV q6h Broad spectrum antibiotic
Gentamicin
1.5-2.5 mg/kg SC, IM, IV q8h Treatment of choice for enterotoxaemia
Marbofloxacin
2-10 mg/kg PO, IM, IV q24h -
Metronidazole
20-40 mg/kg PO q12h Treatment of choice for enterotoxaemia
Oxytetracycline
30 mg/kg SC q72h Treponematosis
Oxytetracycline
15 mg/kg SC q24h -
Penicillin G
40000 IU/kg SC, IM q7days for 3 doses Treponematosis
Dihydrostreptomycin/Penicillin
40 mg/kg penicillin + 50 mg/kg streptomycin SC q24h TEST DOSE of 5 mg/kg is advised first. D...
Tilmicosin
10 mg/kg SC q24h for 3 days or q7days -
Tilmicosin
12.5 mg/kg PO q24h for 7 days -
Tilmicosin
25 mg/kg SC Once only -
Trimethoprim/sulfamethoxazole
40 mg/kg PO q12h Coccidiosis
Tylosin
10 mg/kg PO, SC, IM q12h -

Antiparasitic Agents

10 drugs
Drug Name Dose Range Route Frequency Notes
Albendazole
15-20 mg/kg PO q24h for 2-4 weeks -
Cyromazine
6 % topical Topical Every 8-10 weeks -
Fenbendazole
20 mg/kg PO q24h for 9 or 28 days -
Imidacloprid
10 mg/kg Topical Single application Fleas
Ivermectin
0.4 mg/kg PO, SC q10-14 days × 2-3 doses Ectoparasites
Praziquantel
5-10 mg/kg PO, IM, SC, Topical Single dose -
Pyrethrin
250 mg/kg TD Single application -
Selamectin
6-18 mg/kg Topical Repeat after 4 weeks for Cheyletiella -
Sulfamethazine
100 mg/kg PO q24h Coccidiosis
Toltrazuril
2.5-5 mg/kg PO q24h for 2 days; repeat in 14 days Coccidiosis

Gastrointestinal System

12 drugs
Drug Name Dose Range Route Frequency Notes
Bismuth subsalicylate
0.3-0.6 ml/kg PO q4-6h Analgesic, spasmolytic. Do not use witho...
Butylscopolamine/Metamizole Buscopan
0.1 ml/kg IV, IM q12h Spasmolytic. For gastrointestinal pain r...
Cimetidine
5-10 mg/kg PO q6-12h Gastric and intestinal prokinetic. Do no...
Cisapride
0.5-1 mg/kg PO q8-24h Gastric and intestinal prokinetic. Do no...
Colestyramine
500 mg/kg PO q12h (2g per 20ml water for 14-21 days) Treatment for antibiotic-induced enteroc...
Dinoprost
0.2 mg/kg IM, SC Single injection To assist in emptying impacted caeca, fo...
Domperidone
0.5 mg/kg PO q12h Gastric prokinetic. Alternative to metoc...
Loperamide
0.04-0.2 mg/kg PO q8-12h Gastric motility prokinetic. Do not use...
Metoclopramide
0.2-0.5 mg/kg PO, SC, IV q4-8h Gastric prokinetic, antiemetic
Probiotics
0 per package PO Per package instructions Transfaunation may be more effective tha...
Ranitidine
2-5 mg/kg PO q8-12h H2-receptor antagonist, reduces gastric...
Simethicone
100 mg/kg PO q2-8h For dispersal of gas in gastrointestinal...

Central Nervous System

11 drugs
Drug Name Dose Range Route Frequency Notes
Atropine
0.05 mg/kg IM Single dose Organophosphate toxicity treatment. Appr...
Cyclizine
8 mg/rabbit PO q12h Torticollis
Dexamethasone
0.2-0.6 mg/kg SC, IV Single dose Cerebral injury. See text regarding cont...
Diphenhydramine
2 mg/kg PO, SC q8-12h Torticollis
Furosemide
5-10 mg/kg IM, IV q12h Cerebral oedema
Glycopyrollate
0.1 mg/kg SC, IM Single dose Organophosphate toxicity treatment
Levetiracetam
20 mg/kg PO q8h Torticollis
Meclizine
2-12 mg/kg PO q24h Torticollis
Naloxone
0.01-1 mg/kg IM, IV Single dose Opioid reversal
Prednisolone
0.25-0.5 mg/kg PO q12h for 3 days, then q24h for 3 days, then q48h See text regarding contraindications for...
Prochlorperazine
0.25 mg/kg PO q8h Torticollis

Urogenital System

11 drugs
Drug Name Dose Range Route Frequency Notes
Aglepristone
10 mg/kg SC q24h × 2, on days 6 and 7 after mating Abortion
Bendrofluazide
0.6 mg/kg PO q24h Calcium-sparing diuretic, for use in inc...
Bethanecol
2.5-5 mg/rabbit PO q12h Atonic bladder
Buserelin
0.2 ml/rabbit SC Single dose Induces ovulation in breeding does. AUTH...
Chorionic gonadotrophin
20-25 IU IV Single dose Induces ovulation in breeding does
Diethylstilbestrol
0.5 mg/rabbit PO 1-2 times weekly Post-neutering urinary incontinence in d...
Furosemide
0.3-2 mg/kg IV, SC, IM Single dose Delayed parturition or agalactia. Confir...
Furosemide
1-4 mg/kg IM, SC, PO q4-12h -
Oxytocin
2-12 IU/kg IM, SC Single dose Delayed parturition or agalactia. Confir...
Phenylpropanolamine
6.25-12.5 mg/rabbit PO q12h Oestrogen-dependent urinary incontinence
Proligestone
30 mg/kg SC Single dose Pseudopregnancy. Owing to induced ovulat...

Cardiorespiratory System

9 drugs
Drug Name Dose Range Route Frequency Notes
Benazepril
0.25-0.5 mg/kg PO q24h ACE inhibitor for cardiac disease
Bromhexine
1 mg/kg PO q12-24h Upper and lower respiratory hypersecreto...
Digoxin
0.005-0.01 mg/kg PO q12-24h Congestive heart failure, atrial fibrill...
Diltiazem
0.5-1 mg/kg PO q12-24h Calcium channel blocker for hypertrophic...
Enalapril
0.1-0.5 mg/kg PO q24-48h ACE inhibitor for cardiac disease
Fluticasone
50-250 µg Inhalation q12-72h Increases cardiac contractility in dilat...
Furosemide
2-5 mg/kg PO, SC, IM, IV q12h PRN Congestive heart failure
Pimobendan
0.1-0.3 mg/kg PO q12-24h Increases cardiac contractility in dilat...
Terbutaline
1.25 mg/rabbit PO q8h Bronchodilator

Miscellaneous Agents

18 drugs
Drug Name Dose Range Route Frequency Notes
Activated charcoal
1000 mg/kg PO q4-6h Oral intoxication
Aluminium hydroxide
30-60 mg/kg PO q8-12h Phosphate binder
Calcium gluconate
50-100 mg/kg IP, IV Single dose Hypocalcaemia
Chlorphenamine
0.2-0.4 mg/kg PO q12h Sebaceous adenitis
Chondroitin sulphate
0 per feline dose PO Per package instructions Joint supplement. Use as per feline dose
Ciclosporin
5 mg/kg PO q24h Sebaceous adenitis
Dexamethasone
0.5-2 mg/kg IM, IV, SC Single dose Shock doses for enterotoxaemia
Edetate calcium disodium
27.5 mg/kg SC q6h for 5 days, repeat as necessary 1 week later Heavy metal (lead, zinc) toxicity
Erythropoietin
50-150 IU/kg SC q2-3 days Non-regenerative anaemia
Ferrous sulphate
4-6 mg/kg PO q24h Appetite stimulant
Heparin
5 mg/kg IV Single dose Anticoagulant
Hydroxyzine
2 mg/kg PO q8-12h Antihistamine
Mirtazapine
0.3-0.5 mg/kg PO q24h Appetite stimulant
Nandrolone
2 mg/kg SC, IM Single dose Anabolic steroid, appetite stimulant
Penicillamine
30 mg/kg PO q12h Chelating agent for copper and lead toxi...
Polysulphated glycosaminoglycan
2.2 mg/kg SC, IM q3 days for 21-28 days, then q14 days Prevention of postoperative adhesions
Verapamil
0.2 mg/kg IP q8h for 9 doses Prevention of postoperative adhesions
Vitamin K
1-10 mg/kg IM Single dose Coagulopathy, rodenticide toxicity

Ophthalmic Agents (Topical)

8 drugs
Drug Name Dose Range Route Frequency Notes
Betaxolol
0 Topical Topical (eye) q12h Glaucoma
Chloramphenicol
0 Topical Topical (eye) As directed Increases tear production
Ciclosporin A
0 Topical Topical (eye) q12h Keratoconjunctivitis sicca
Ciprofloxacin
0 Topical Topical (eye) q8-12h Conjunctivitis
Dichlorphenamide
1-2 mg/kg PO q24h Glaucoma
Dorzolamide
0 Topical Topical (eye) q8-24h Glaucoma
Fusidic acid
0 Topical Topical (eye) q12-24h Conjunctivitis. Authorized for rabbits (...
Gentamicin
1-2 drops Topical (eye) q8h for 5-7 days Conjunctivitis. Authorized for rabbits (...

Topical Agents

3 drugs
Drug Name Dose Range Route Frequency Notes
Lidocaine, prilocaine
0 Topical application Topical As needed Full-thickness local anaesthesia (EMLA c...
Fusidic acid
0 Apply Topical q24h for 2-3 days With or without betamethasone, for topic...
Silver sulfadiazine
0 Apply topically Topical q24h Good Gram-negative activity including Ps...

Route Abbreviations

  • PO - Oral (by mouth)
  • SC - Subcutaneous (under the skin)
  • IM - Intramuscular
  • IV - Intravenous
  • TM - Transmucosal (buccal)
  • IN - Intranasal
  • IT - Intratracheal
  • Topical - Applied to skin

Frequency Abbreviations

  • q4h - Every 4 hours
  • q6h - Every 6 hours
  • q8h - Every 8 hours
  • q12h - Every 12 hours
  • q24h - Every 24 hours (once daily)
  • PRN - As needed
  • CRI - Constant rate infusion

Rabbit Medication Guide

This rabbit drug dosage calculator covers 126+ veterinary medications across 10 categories. Below you will find practical guidance on calculating dosages, understanding drug routes, safety warnings, and tips from experienced breeders. All drug data is sourced from Harcourt-Brown (2002), Carpenter's Exotic Animal Formulary, Varga (2014), and other peer-reviewed veterinary references.

How to Calculate Rabbit Drug Dosages

Getting the dose wrong can lead to underdosing (ineffective treatment) or overdosing (toxicity). Here is the four-step process our calculator automates:

  1. Weigh your rabbit accurately. Use a digital kitchen scale for small breeds or a baby scale for larger breeds. Weigh in kilograms for direct compatibility with veterinary dosing charts. If you weigh in pounds, multiply by 0.45 to convert.
  2. Find the prescribed drug's dose range. Veterinary references list doses as mg/kg (milligrams per kilogram of body weight). Most drugs have a range, for example Meloxicam at 0.2-0.6 mg/kg. The calculator uses the midpoint.
  3. Calculate the total dose. Multiply the dose rate (mg/kg) by your rabbit's weight in kg. For a 2 kg rabbit at 0.4 mg/kg Meloxicam, the total dose is 0.8 mg.
  4. Calculate the volume to administer. Divide the total dose by the drug's concentration. If your Meloxicam is 1.5 mg/mL, then 0.8 mg divided by 1.5 mg/mL equals 0.53 mL.
A 500-gram weighing error in a 2 kg rabbit changes the dose by 25%. Precision matters, especially for drugs with narrow therapeutic windows like aminoglycosides.

Common Rabbit Medications Quick Reference

Rabbits have unique pharmacology. Many drugs safe for dogs and cats are dangerous or fatal to rabbits, particularly oral penicillin-based antibiotics. Below are the most commonly used medications based on what we use in our rabbitry and what veterinary literature supports.

Pain Relief

Pain management is critical because rabbits hide pain as a prey species survival instinct. By the time you notice teeth grinding or hunched posture, the pain is already significant. Untreated pain leads to GI stasis and rapid decline.

DrugDose RangeRouteBest For
Meloxicam0.2-0.6 mg/kgSC, POPost-surgical pain, arthritis, inflammation
Buprenorphine0.01-0.05 mg/kgSC, IM, IV, TMModerate to severe pain, post-operative
Gabapentin3-10 mg/kgPONerve pain, chronic pain, pre-anesthetic sedation
Tramadol4.4-11 mg/kgPOModerate pain when injection is not feasible

Rabbit-Safe Antibiotics

Oral penicillins, amoxicillin, lincomycin, and clindamycin can cause fatal enterotoxemia by destroying cecal bacteria and allowing Clostridium overgrowth. These antibiotics are considered safe at correct doses:

DrugDose RangeRouteCommon Use
Enrofloxacin10-30 mg/kgPO, SC, IMRespiratory and urinary infections
Trimethoprim/Sulfa40 mg/kgPOCoccidiosis, urinary tract infections
Chloramphenicol30-50 mg/kgPOBroad-spectrum, authorized for rabbits
Metronidazole20-40 mg/kgPOEnterotoxemia, anaerobic infections

GI Medications

Gastrointestinal stasis is the most common emergency in rabbits. If your rabbit stops pooping, these medications help restore gut motility. Never use prokinetics if intestinal obstruction has not been ruled out.

DrugDose RangeRoutePurpose
Cisapride0.5-1.0 mg/kgPOGI prokinetic, restores motility
Metoclopramide0.2-0.5 mg/kgPO, SC, IVGastric prokinetic, antiemetic
Ranitidine2-5 mg/kgPOReduces gastric acid, prokinetic effects
Simethicone100 mg/kgPOGas dispersal for bloating relief

Understanding Drug Administration Routes

The route of administration affects how quickly a drug works and how much reaches the bloodstream. Choosing the wrong route can reduce effectiveness or cause tissue damage.

Oral (PO)

Most common for home treatment. Use a 1 mL syringe placed into the diastema (the gap between incisors and molars). Dispense slowly, 0.2 mL at a time to prevent aspiration. Rabbits cannot vomit, so oral medications stay down once swallowed. Absorption is slower than injectable routes but suitable for long-term treatments.

Subcutaneous (SC)

Injected under the skin in the scruff between the shoulder blades. Absorption takes 15 to 30 minutes. This is the most common injectable route for owners trained by their vet. SC fluids are critical for dehydrated rabbits and GI stasis cases. We administer SC fluids regularly in our rabbitry.

Intramuscular (IM)

Injected into the quadriceps or lumbar muscles. Faster absorption than SC. Rabbits have limited muscle mass, so injection volumes must be under 0.5 mL per site. More painful than SC and reserved for situations where rapid absorption is needed.

Transmucosal (TM)

Applied to the gum tissue where it absorbs directly into the bloodstream. Buprenorphine is commonly given this way because it has excellent transmucosal absorption, avoiding the risk of the rabbit spitting out medication.

Drug Safety Warnings for Rabbits

Rabbits are not small cats or dogs. Their hindgut-fermenting digestive system makes them uniquely vulnerable to certain drug classes. Here are the critical safety issues every rabbit owner and breeder must understand.

Antibiotics That Can Kill Rabbits

Oral penicillins (amoxicillin, ampicillin), lincosamides (lincomycin, clindamycin), and oral cephalosporins destroy cecal microflora, allowing Clostridium spiroforme overgrowth that produces fatal iota toxin. Death can occur within 48 to 72 hours of a single dose. Our calculator flags these drugs with warning icons. Injectable forms sometimes bypass the gut and can be used safely, but only under direct veterinary supervision.

NSAID Precautions

Meloxicam and Carprofen are commonly used for pain, but they carry renal and GI risks. Never use NSAIDs in dehydrated rabbits. Carprofen at higher doses (2-4 mg/kg) should be limited to 3 days maximum. Flunixin carries higher GI risk than Meloxicam and is reserved for severe, short-term pain.

The 40% Atropine Problem

Approximately 40% of domestic rabbits produce atropinesterase, an enzyme that rapidly breaks down atropine. Atropine-based pre-anesthetic protocols may be completely ineffective. Glycopyrrolate is the recommended alternative. There is no simple test to determine which rabbits produce this enzyme, so many vets use Glycopyrrolate by default.

Practical Medication Tips for Breeders

Medicine Cabinet Essentials

Keep these on hand for emergencies: Meloxicam (pain/inflammation), Simethicone infant drops (gas), critical care feeding formula, subcutaneous fluids (lactated Ringer's with administration sets), and a broad-spectrum antibiotic prescribed by your vet. Check expiration dates monthly.

Accurate Weighing Is Not Optional

A 500-gram error in a 2 kg rabbit changes the dose by 25%. For drugs like Gentamicin or Amikacin, this could mean the difference between treatment and toxic overdose. Use a digital kitchen scale for dwarf breeds and a baby scale for larger breeds. Weigh before every dose adjustment, not just at treatment start.

Compounding for Tiny Patients

A 1 kg rabbit needing Buprenorphine at 0.03 mg/kg from a 0.3 mg/mL solution requires just 0.1 mL. Use 1 mL insulin syringes for accuracy at these volumes. Ask your vet about compounding pharmacies that prepare more dilute formulations for easier dosing of small rabbits and kits.

Frequently Asked Questions

Can I give my rabbit human medications?

Some human medications are safe for rabbits at specific doses, including Meloxicam, Simethicone, Ranitidine, and Gabapentin. However, concentrations and inactive ingredients in human formulations may differ. Never give a rabbit any medication without veterinary guidance on the exact product and dose.

How do I convert my rabbit's weight from pounds to kilograms?

Multiply the weight in pounds by 0.45 to get kilograms. For example, a 5-pound rabbit weighs approximately 2.25 kg. Our calculator handles this conversion automatically when you select "lb" as the weight unit.

Why are some antibiotics dangerous for rabbits?

Rabbits are hindgut fermenters with a delicate cecal microbiome. Oral penicillins, amoxicillin, and lincosamides destroy beneficial gut bacteria, allowing Clostridium overgrowth that produces fatal toxins. Injectable forms sometimes bypass the gut and can be used safely under veterinary supervision.

What is the most commonly prescribed pain medication for rabbits?

Meloxicam is the most widely used analgesic for rabbits. It is effective for post-surgical pain, arthritis, and general inflammation at 0.2-0.6 mg/kg given orally or subcutaneously every 12-24 hours. It has a good safety profile when used in well-hydrated rabbits.

How do I give oral medication to a rabbit that resists?

Use a small syringe (1 mL) placed into the diastema, the gap between the incisors and molars on the side of the mouth. Dispense slowly in 0.2 mL increments to prevent aspiration. Mixing medications with a small amount of unsweetened banana baby food can improve acceptance.

What should I keep in a rabbit emergency medicine kit?

Essential items include Simethicone for gas, critical care feeding formula, subcutaneous fluids (lactated Ringer's), 1 mL syringes, a digital scale, and a vet-prescribed pain medication like Meloxicam. Keep your rabbit-savvy vet's emergency number posted prominently.

Does drug concentration affect the dose I need to give?

Drug concentration does not change the dose (amount of active ingredient) but determines the volume you administer. A higher concentration means a smaller volume for the same dose. Always enter the concentration from your specific product's label into the calculator to get the correct volume.