This calculator provides reference information only. Always follow your veterinarian's specific dosing instructions. Never medicate your cat without veterinary guidance. If your cat shows adverse reactions, contact your veterinarian immediately.

Prescription medication reference · Vet guidance required

Cat Medication Dosage Calculator

Enter your cat's weight to calculate reference dosage ranges for azithromycin, Clavamox, Panacur, gabapentin, metronidazole, prednisolone, Onsior, and Cerenia. Use this page to understand a veterinary plan, not to choose or start medication on your own.

Calculate reference doseCheck your cat's life stage

Important Safety Notice

This is reference information only.

This calculator provides reference information only. Always follow your veterinarian's specific dosing instructions. Never medicate your cat without veterinary guidance. If your cat shows adverse reactions, contact your veterinarian immediately.

Never give acetaminophen, ibuprofen, or aspirin unless your veterinarian gives exact instructions.

Need exact kg? Calculate your cat's weight in kg.

Calculate Reference Dosage by Weight

Medication and weight

This calculator provides reference information only. Always follow your veterinarian's specific dosing instructions. Never medicate your cat without veterinary guidance. If your cat shows adverse reactions, contact your veterinarian immediately.

Unit

Calculation weight: 4.54 kg / 10.0 lbs

Medication guide

Common Cat Medications: Complete Dosage Guide

These profiles explain common veterinary uses, reference dose ranges, formulations, side effects, and safety notes. They are for context only; your veterinarian's prescription is the source of truth.

Azithromycin for Cats

Zithromax, Zmax · Antibiotic - Macrolide

Reference: 5-10 mg/kg · Every 24-48 hours

Common uses

  • - Upper respiratory infections (off-label)
  • - Bartonellosis (off-label)
  • - Cryptosporidiosis (off-label)
  • - Toxoplasmosis (off-label)
  • - Cytauxzoonosis when combined with atovaquone

Side effects

  • - Vomiting
  • - Decreased appetite
  • - Diarrhea

Administration notes

  • - Tablets should be given with food to reduce stomach upset.
  • - Liquid suspension should be shaken well and given on an empty stomach.
  • - Measure liquid carefully with a dosing syringe.
  • - All listed feline uses are off-label, so your veterinarian's directions control the actual dose.

Source: VCA Hospitals azithromycin drug information; Plumb's Veterinary Drug Handbook

Amoxicillin + Clavulanic Acid for Cats

Clavamox · Antibiotic - Penicillin + beta-lactamase inhibitor

Reference: 62.5 mg per cat · Every 12 hours (twice daily)

Common uses

  • - Skin and soft tissue infections
  • - Urinary tract infections
  • - Respiratory infections
  • - Wound infections

Side effects

  • - Vomiting
  • - Diarrhea
  • - Loss of appetite

Administration notes

  • - Give with food to reduce gastrointestinal upset.
  • - Refrigerate oral drops and discard unused medication after 10 days.
  • - Shake oral drops well before each dose.
  • - Complete the full course even if your cat seems better.

Source: Plumb's Veterinary Drug Handbook; Zoetis Clavamox product label

Fenbendazole for Cats

Panacur, Safe-Guard · Anthelmintic - Dewormer

Reference: 50-50 mg/kg · Once daily

Common uses

  • - Giardia
  • - Roundworms
  • - Hookworms
  • - Lungworms
  • - Some tapeworm protocols

Side effects

  • - Generally well tolerated
  • - Rare vomiting
  • - Rare diarrhea

Administration notes

  • - Mix granules with a small amount of food for easiest administration.
  • - Give at the same time each day for the full treatment course.
  • - A second course may be needed for Giardia protocols.
  • - Confirm parasite diagnosis and repeat-testing plan with your veterinarian.

Source: Plumb's Veterinary Drug Handbook; Merck Veterinary Manual

Metronidazole for Cats

Flagyl · Antiprotozoal / Antibiotic

Reference: 10-25 mg/kg · Every 12-24 hours

Common uses

  • - Giardia
  • - Inflammatory bowel disease protocols
  • - Diarrhea protocols
  • - Anaerobic bacterial infections

Side effects

  • - Nausea
  • - Vomiting
  • - Decreased appetite
  • - Rare neurologic signs at high doses

Administration notes

  • - Metronidazole tablets are extremely bitter and may cause foaming or refusal.
  • - Ask your veterinarian about a compounded flavored liquid if administration is difficult.
  • - Give with food to reduce stomach upset.
  • - Do not crush tablets unless your veterinarian confirms it is appropriate.

Source: Plumb's Veterinary Drug Handbook; Merck Veterinary Manual

Gabapentin for Cats

Neurontin, Aclonium, Gralise · Anticonvulsant / Analgesic / Anxiolytic

Reference: 5-10 mg/kg · Every 8-12 hours for pain/seizures; single dose for vet visit anxiety

Common uses

  • - Chronic neuropathic pain (off-label)
  • - Seizure support (off-label)
  • - Pre-veterinary visit anxiety (off-label)

Side effects

  • - Sedation
  • - Incoordination or wobbly gait
  • - These effects often lessen over time

Administration notes

  • - Can be given with or without food; give with food if vomiting occurs.
  • - For vet visit anxiety, give 1.5-2 hours before the appointment and keep your cat calm afterward.
  • - Capsules may be opened and mixed with a small amount of wet food if your veterinarian approves.
  • - Do not stop abruptly in epileptic cats; taper only under veterinary guidance.

Source: VCA Hospitals gabapentin drug information; Plumb's Veterinary Drug Handbook

Prednisolone for Cats

Prelone, Pediapred · Corticosteroid

Reference: 1-2 mg/kg · Once daily, or as prescribed with tapering

Common uses

  • - Inflammatory bowel disease
  • - Allergic reactions
  • - Asthma protocols
  • - Immune-mediated conditions
  • - Some lymphoma protocols

Side effects

  • - Increased thirst
  • - Increased urination
  • - Increased appetite
  • - Weight gain
  • - Increased infection risk

Administration notes

  • - Give with food to reduce gastrointestinal upset.
  • - Prednisolone is generally preferred over prednisone for cats.
  • - Never stop abruptly after repeated or long-term dosing.
  • - Monitor for increased thirst, urination, and appetite.

Source: Plumb's Veterinary Drug Handbook; Merck Veterinary Manual

Robenacoxib for Cats

Onsior · NSAID - Non-steroidal anti-inflammatory

Reference: 1-2.4 mg/kg · Once daily

Common uses

  • - Acute pain and inflammation
  • - Post-surgical pain
  • - Musculoskeletal pain
  • - Dental pain

Side effects

  • - Vomiting
  • - Diarrhea
  • - Reduced appetite
  • - GI ulceration with prolonged or combined use

Administration notes

  • - Give 30 minutes before or after food for best absorption.
  • - Do not combine with other NSAIDs or corticosteroids.
  • - Monitor for vomiting, diarrhea, reduced appetite, or dark stools.
  • - Make sure your cat is well hydrated before and during treatment.

Source: EMA Onsior product information; Plumb's Veterinary Drug Handbook

Maropitant citrate for Cats

Cerenia · Antiemetic - NK1 receptor antagonist

Reference: 1-1 mg/kg · Once daily

Common uses

  • - Acute vomiting
  • - Motion sickness
  • - Nausea with chemotherapy protocols
  • - Post-operative nausea

Side effects

  • - Mild sedation
  • - Hypersalivation
  • - Loss of appetite

Administration notes

  • - For motion sickness, give at least 1 hour before travel.
  • - Follow your veterinarian's timing instructions for nausea or vomiting.
  • - Maximum 5 consecutive days of use unless your veterinarian directs otherwise.
  • - Use caution in cats with hepatic disease.

Source: Zoetis Cerenia product label; Plumb's Veterinary Drug Handbook

Giving guide

How to Give Your Cat Oral Medication

How to give a cat a pill

  1. 1. Prepare the pill, a small treat, and water first.
  2. 2. Use a pill pocket or pill popper if appropriate.
  3. 3. Place the pill behind the tongue, close the mouth briefly, and follow with water or a treat if allowed.

How to give liquid medication

  1. 1. Measure with the provided syringe only.
  2. 2. Place the syringe tip into the side of the mouth.
  3. 3. Give small amounts slowly with the head level; do not squirt liquid straight down the throat.

How to give a capsule

  1. 1. Ask your vet if the capsule can be opened.
  2. 2. If approved, mix contents with a small amount of wet food.
  3. 3. For bitter medications, request a compounded flavored form instead of opening capsules.

When to call your veterinarian

Call promptly if these signs appear

Neurologic symptoms such as wobbling, tremors, disorientation, or seizures after medication.

Severe vomiting or diarrhea that continues longer than 24 hours.

Refusing food for more than 24 hours, especially while on antibiotics, NSAIDs, or steroids.

Possible allergic reaction: facial swelling, hives, collapse, or difficulty breathing.

Check toxicity risk

Related tools

Connect dose safety to the bigger care picture

Calculate your cat's weight in kg

Use an accurate kg weight before reviewing any medication dose.

Assess your cat's overall wellbeing

Medication decisions often belong inside a broader comfort and quality-of-life conversation.

Check your cat's life stage

Kittens, adults, seniors, and geriatric cats can have different safety considerations.

FAQ

Frequently Asked Questions About Cat Medication Dosage

What is the azithromycin dose for cats?

The typical azithromycin reference dose for cats is 5-10 mg/kg by mouth every 24-48 hours, depending on the condition being treated. Tablets are usually given with food, while liquid suspension is usually shaken and given on an empty stomach. All feline uses are off-label, so always follow your veterinarian's exact instructions.

What is the Clavamox dosage for cats?

A common Clavamox reference dose for cats is 62.5 mg per cat every 12 hours. Oral drops should be refrigerated, shaken well, and discarded after 10 days. Give with food and complete the full course unless your veterinarian changes the plan.

What is the Panacur dose for cats?

The standard Panacur or fenbendazole reference dose is 50 mg/kg once daily for 3-5 consecutive days. It is commonly used in parasite protocols such as Giardia, roundworms, and hookworms. Follow your veterinarian's diagnostic and repeat-treatment instructions.

What is the gabapentin dose for cats?

Gabapentin reference dosing for chronic pain or seizure support is often 5-10 mg/kg every 8-12 hours. Vet-visit anxiety protocols may use a single 50-100 mg dose before the appointment. Human liquid gabapentin may contain xylitol, and epileptic cats should not stop gabapentin abruptly.

Can I give my cat human medication?

Never give human medication unless your veterinarian specifically prescribed it for your cat. Acetaminophen, ibuprofen, naproxen, many NSAIDs, and some liquid medications can be dangerous or fatal to cats.

What should I do if I miss giving my cat a dose?

Give the missed dose as soon as you remember unless it is almost time for the next scheduled dose. If it is almost time, skip the missed dose and resume the regular schedule. Never give two doses at once.

How do I give my cat a pill?

Prepare the pill, a small treat, and water before bringing your cat. Use a pill pocket, pill popper, or direct pilling if your veterinarian recommends it. Follow with water or a treat if allowed, and ask whether the medication can be crushed before mixing it with food.