Metacam Dosage for Cats Calculator
Free Metacam dosage cats Calculator for cats. Enter variables to compute results with formulas and detailed steps. Free to use with no signup required.
Calculator
Adjust values & calculateDosage Details
Formula
The Metacam dose is calculated by multiplying the cat's body weight in kilograms by the prescribed dose rate. Day 1 uses a higher loading dose (0.1-0.3 mg/kg depending on indication), while maintenance therapy uses 0.05 mg/kg. The volume to administer is determined by dividing the calculated dose by the concentration of the formulation being used.
Last reviewed: December 2025
Worked Examples
Example 1: Post-Surgical Cat (Day 1)
Example 2: Chronic Arthritis (Maintenance)
Background & Theory
The Metacam Dosage for Cats Calculator applies the following established principles and formulas. Biology is the scientific study of life, encompassing the structure, function, growth, evolution, and distribution of living organisms. At the cellular level, all life is composed of cells, the basic structural and functional units of organisms. Prokaryotic cells lack a membrane-bound nucleus, while eukaryotic cells possess a nucleus and membrane-bound organelles including mitochondria, which generate ATP through oxidative phosphorylation, and ribosomes, which synthesize proteins. Genetics quantifies the inheritance of traits. Gregor Mendel's laws describe how alleles segregate during gamete formation and assort independently for genes on different chromosomes. Punnett squares provide a visual method for calculating the probability of offspring genotypes and phenotypes from known parental genotypes. For a monohybrid cross of two heterozygotes (Aa ร Aa), the expected phenotypic ratio is 3 dominant to 1 recessive. The Hardy-Weinberg equilibrium principle states that allele and genotype frequencies in a population remain constant from generation to generation in the absence of evolutionary forces. If p and q are the frequencies of two alleles at a locus, then p + q = 1 and genotype frequencies are pยฒ, 2pq, and qยฒ for the three possible genotypes. Deviations from equilibrium signal the action of natural selection, genetic drift, mutation, migration, or non-random mating. Population growth follows two primary models. Exponential growth, N = Nโeสณแต, describes unlimited growth where Nโ is the initial population, r is the intrinsic rate of increase, and t is time. Logistic growth incorporates carrying capacity K, describing how growth slows as population approaches the environment's maximum sustainable size: dN/dt = rN(1 โ N/K). Enzyme kinetics describes the rate of enzyme-catalyzed reactions. The Michaelis-Menten equation, v = Vmax[S]/(Km + [S]), relates reaction velocity v to substrate concentration [S], maximum velocity Vmax, and the Michaelis constant Km, which equals the substrate concentration at half-maximal velocity. DNA replication relies on complementary base pairing: adenine pairs with thymine (two hydrogen bonds) and guanine with cytosine (three hydrogen bonds), ensuring faithful copying of genetic information.
History
The history behind the Metacam Dosage for Cats Calculator traces back through the following developments. The systematic study of living things began with Aristotle (384โ322 BCE), who classified over 500 animal species and wrote foundational texts on anatomy, reproduction, and animal behavior. His scala naturae ranked organisms in a hierarchy from simple to complex and influenced biological thought for two millennia. Theophrastus, his student, applied similar methods to plants. Carl Linnaeus established modern taxonomy in Systema Naturae (1735), introducing the binomial nomenclature system that assigns each organism a genus and species name. His hierarchical classification system โ species, genus, family, order, class, phylum, kingdom โ provided the organizational framework that biologists still use, now extended to seven ranks and supplemented by cladistics. Charles Darwin and Alfred Russel Wallace independently developed the theory of evolution by natural selection, which Darwin published in On the Origin of Species in 1859. Darwin argued that heritable variation exists within populations, that organisms with advantageous traits survive and reproduce at higher rates, and that this differential reproduction gradually changes the character of populations over generations. This unified all of biology under a single explanatory framework. Gregor Mendel's meticulous pea plant experiments, conducted from 1856 to 1863 and published in 1866, established the particulate nature of inheritance and the laws of segregation and independent assortment. Overlooked until 1900, when three botanists independently rediscovered his work, Mendel's laws laid the foundation for the science of genetics. James Watson and Francis Crick, building on Rosalind Franklin's X-ray crystallography data, determined the double-helix structure of DNA in 1953, revealing the physical basis of heredity and the mechanism by which genetic information is stored and copied. The Human Genome Project, a 13-year international collaboration, published the complete sequence of the human genome in 2003, comprising approximately 3.2 billion base pairs. The development of CRISPR-Cas9 gene editing by Jennifer Doudna, Emmanuelle Charpentier, and colleagues from 2012 onward opened an era of precise genome modification with transformative implications for medicine, agriculture, and basic research.
Frequently Asked Questions
Formula
Dose (mg) = Weight (kg) x Dose Rate (mg/kg); Volume (ml) = Dose (mg) / Concentration (mg/ml)
The Metacam dose is calculated by multiplying the cat's body weight in kilograms by the prescribed dose rate. Day 1 uses a higher loading dose (0.1-0.3 mg/kg depending on indication), while maintenance therapy uses 0.05 mg/kg. The volume to administer is determined by dividing the calculated dose by the concentration of the formulation being used.
Frequently Asked Questions
What is Metacam and is it safe for cats?
Metacam (meloxicam) is a non-steroidal anti-inflammatory drug (NSAID) used in veterinary medicine for pain relief and inflammation reduction. While widely used in dogs, its use in cats requires extreme caution due to the feline sensitivity to NSAIDs. Cats have limited ability to metabolize meloxicam through glucuronidation, leading to a much longer half-life (approximately 24 hours) compared to dogs (12 hours). In the US, only a single injectable dose of Metacam is FDA-approved for cats for post-surgical pain. In Europe and other regions, a cat-specific oral formulation (0.5 mg/ml) is approved for longer-term use at very low doses (0.05 mg/kg). Overdosing or prolonged use without monitoring can cause severe kidney damage and gastrointestinal ulceration.
What is the correct Metacam dose for cats?
The approved Metacam dosing for cats is very precise and differs significantly from dog dosing. For post-operative pain, a single subcutaneous injection of 0.3 mg/kg is given by the veterinarian. For ongoing oral pain management (where approved), the initial dose on day 1 is typically 0.1-0.2 mg/kg, followed by a maintenance dose of 0.05 mg/kg once daily. This maintenance dose is just one-quarter to one-tenth of the typical dog dose. The cat-specific formulation (0.5 mg/ml) comes with a graduated dropper calibrated for accurate feline doses. Using the dog formulation (1.5 mg/ml) for cats is risky because the volumes are extremely small and easily miscalculated. Always use an oral syringe for precise measurement.
What are the side effects of Metacam in cats?
Side effects of Metacam in cats can be serious and include gastrointestinal issues (vomiting, diarrhea, decreased appetite, blood in stool), kidney damage (increased thirst, increased urination, lethargy), and liver problems. Cats with pre-existing kidney disease, dehydration, heart disease, or liver problems are at significantly higher risk and generally should not receive Metacam. Signs of adverse reaction include loss of appetite, vomiting, changes in drinking or urination patterns, dark or tarry stool, yellowing of gums or skin, and lethargy. If any of these signs occur, stop the medication immediately and contact your veterinarian. Regular bloodwork (kidney values, liver enzymes) should be performed before starting and during treatment to detect problems early.
Can I use dog Metacam for my cat?
Using the dog formulation of Metacam for cats is strongly discouraged unless specifically instructed by your veterinarian. The dog oral suspension is three times more concentrated (1.5 mg/ml vs. 0.5 mg/ml), making accurate dosing for cats extremely difficult. A tiny error with the dog formulation could result in a dangerous overdose. The dog formulation dropper is calibrated for dog-sized doses and cannot accurately measure the tiny volumes needed for cats. If only the dog formulation is available and your vet approves its use, you MUST use a precision oral syringe (0.1 ml graduations) and calculate the dose very carefully. The cat-specific 0.5 mg/ml formulation with its calibrated dropper is strongly preferred for feline patients.
How long can a cat take Metacam?
The duration of Metacam treatment for cats is a topic of ongoing veterinary debate. In the US, only a single injectable dose is FDA-approved. In Europe, longer-term oral use at 0.05 mg/kg/day is approved with monitoring. For acute pain (post-surgery, injury), treatment is typically limited to 1-5 days. For chronic conditions like osteoarthritis, some veterinarians prescribe long-term low-dose therapy when the benefits outweigh the risks, but this requires regular monitoring including bloodwork every 3-6 months to check kidney and liver function. Many veterinary pain specialists recommend using the lowest effective dose and considering dose reduction or drug holidays. Alternative pain management strategies (gabapentin, acupuncture, joint supplements) may be used alongside or instead of Metacam to minimize NSAID exposure.
Why is drug interaction awareness important in dosage calculations?
Drug interactions can significantly alter medication effectiveness and safety. Enzyme inhibitors can increase drug levels (risk of toxicity), while inducers can decrease them (risk of treatment failure). CYP450 interactions are most common. Always check interactions when patients take multiple medications and adjust doses accordingly.
References
Reviewed by Daniel Agrici, Founder & Lead Developer ยท Editorial policy