What is Dr. Zubair Khalid's research focus?

Dr. Zubair Khalid specializes in molecular virology, mRNA vaccine development, and computational biology, with a focus on avian pathogens like IBDV and Avian Reovirus.

Where is Dr. Zubair Khalid currently working?

Dr. Zubair Khalid is a Postdoctoral Research Associate at the University of Maryland (UMD), specifically within the Department of Animal and Avian Sciences.

Clindamycin for Dogs and Cats: Dose Guide

Name: Clindamycin for Dogs and Cats: Dose Guide
Creator: Dr. Zubair Khalid

By Dr. Zubair Khalid, DVM, MS, PhD · 2026-09-20

Clindamycin is a lincosamide antibiotic used in dogs and cats to treat soft tissue infections, dental infections, osteomyelitis, and toxoplasmosis. It is a prescription drug, it comes as oral capsules, oral liquid, and injectable forms, and the dose is species-specific. Dogs are typically dosed at 5 to 11 mg/kg every 12 hours, and cats are dosed in the same range, but cats face a special risk of esophageal stricture if a pill is swallowed without food or water. Give clindamycin with food and follow it with a water chaser. This guide explains what clindamycin treats, how it is dosed in dogs and cats, the side effects to watch for, and the animals that must never receive it.

This article is educational and is not a substitute for veterinary diagnosis or treatment.

At a Glance

Feature	Detail
Active ingredient	Clindamycin hydrochloride (oral) or clindamycin phosphate (injectable)
Drug class	Lincosamide antibiotic
Species	Dogs and cats
Common labeled uses	Soft tissue infections, dental infections, osteomyelitis, toxoplasmosis
Typical dog dose	5 to 11 mg/kg every 12 hours, or 11 mg/kg once daily for some skin infections [1][2][3]
Typical cat dose	5 to 11 mg/kg every 12 hours
How it is given	Orally as a capsule or liquid, or by injection in a veterinary clinic
Onset	Antibiotic effect begins within hours, clinical improvement takes days
Duration	Commonly 5 to 14 days for dental and soft tissue infections, longer for bone infections
Prescription status	Prescription only in the United States
Do not give to	Rabbits, guinea pigs, hamsters, and other small herbivores

What Clindamycin Is and How It Works

Clindamycin HCl 300 mg capsules made by Aurobindo Pharma — Clindamycin comes as capsules like these; never guess a dose for your dog or cat without veterinary guidance. Image: Mx. Granger, CC0, via Wikimedia Commons.

Clindamycin belongs to the lincosamide family of antibiotics. It works by binding to the bacterial ribosome and blocking protein synthesis, which stops susceptible bacteria from growing and lets the body's immune system clear the infection. The drug is well absorbed after oral dosing and distributes widely into tissues, including skin, bone, and the periodontal tissues of the mouth.

Clindamycin has strong activity against many gram-positive cocci, including Staphylococcus species, and against a broad range of anaerobic bacteria. That combination is why it is used so often in dental disease and in skin infections, where mixtures of staphylococci and oral anaerobes are common. In dogs, clindamycin is frequently used for bacterial pyoderma, deep staphylococcal skin infections, and periodontal disease [1][4]. In cats, it is used for similar soft tissue and dental infections and for toxoplasmosis.

Clindamycin is not a broad-spectrum antibiotic that covers every organism. It has poor activity against most gram-negative aerobic bacteria, including many strains of Escherichia coli and Pseudomonas. It is also not the first choice for methicillin-resistant staphylococcal infections, because resistance rates to clindamycin are high in those isolates. A German laboratory study of Staphylococcus pseudintermedius from dogs and cats found resistance to clindamycin in 32.7% of canine isolates and 37.2% of feline isolates, and methicillin-resistant strains carried even higher co-resistance [5]. A South Korean surveillance study of S. pseudintermedius reported resistance to clindamycin in more than half of the isolates tested [6]. These numbers explain why culture and susceptibility testing matter before committing to a long course of clindamycin.

Species-Specific Dosing

Dosing is not identical across species, and it is never something an owner should calculate alone. The following ranges come from published veterinary pharmacokinetic and clinical studies.

Clindamycin Dose for Dogs

The standard clindamycin dog dose is 5 to 11 mg/kg given every 12 hours. A series of pharmacokinetic studies in healthy beagles compared 5.5 mg/kg twice daily against 11 mg/kg once daily and found that the once-daily regimen produced higher peak serum concentrations and a larger area under the concentration-time curve [1][2]. For skin infections in particular, the once-daily 11 mg/kg regimen achieved a better pharmacokinetic profile relative to the minimum inhibitory concentration of common skin pathogens [1].

Clinical studies support this. A trial of 21 dogs with superficial bacterial pyoderma treated with clindamycin at approximately 11 mg/kg once daily for 14 to 42 days produced complete remission in 71.4% of the dogs within 14 to 28 days [3]. A separate study of 20 dogs with deep staphylococcal pyoderma used the same 11 mg/kg once-daily dose and reported an excellent response in all 20 dogs, with treatment lasting 21 to 91 days and an average of 45 days [4]. For posttraumatic osteomyelitis, an experimental canine model found that 11 mg/kg given orally twice daily for 28 days was the most effective regimen tested [7].

So the clindamycin dosage for dogs depends on the infection. Superficial skin infections may be treated once daily. Bone infections and some deep infections are treated twice daily. Your veterinarian will choose based on the diagnosis, the severity, and the response to treatment.

Clindamycin Dose for Cats

Cats are dosed in the same 5 to 11 mg/kg range every 12 hours, but the way the drug is administered matters more in cats than in dogs. Cats are more prone to esophageal strictures if a clindamycin pill is given without food or water. A dry pill can lodge in the esophagus, and the drug's local irritant effect on the esophageal lining can lead to narrowing and scarring. This is a serious and sometimes permanent complication.

The practical rule is simple. Give clindamycin with a meal, and follow the pill with a few milliliters of water or a small amount of wet food to push it down. Never give a dry clindamycin capsule to a cat on an empty stomach. If your cat will not eat, ask your veterinarian whether a liquid formulation or a different antibiotic is a better option.

Clindamycin is also used in cats for toxoplasmosis, often in combination with other drugs. Because toxoplasmosis treatment can be prolonged, your veterinarian will set the dose and duration based on the severity of the infection and the cat's response.

Dosing Table

Species	Indication	Dose Range	Cautions
Dog	Superficial bacterial pyoderma	11 mg/kg once daily, or 5.5 mg/kg twice daily [1][2][3]	Confirm with culture if recurrent or nonresponsive
Dog	Deep staphylococcal pyoderma	11 mg/kg once daily [4]	Course may run 21 to 91 days
Dog	Posttraumatic osteomyelitis	11 mg/kg twice daily for 28 days [7]	Long courses need monitoring
Dog	Dental and periodontal infections	5 to 11 mg/kg every 12 hours	Often used around dental procedures [8][9]
Cat	Soft tissue and dental infections	5 to 11 mg/kg every 12 hours	Give with food and a water chaser
Cat	Toxoplasmosis	5 to 11 mg/kg every 12 hours	Often combined with other drugs
Rabbit, guinea pig, hamster	Any indication	Do not use	Fatal enterotoxemia risk

What Clindamycin Treats

Clindamycin use in dogs and cats covers four main categories.

Soft Tissue Infections

Skin and soft tissue infections are the most common reason clindamycin is prescribed. Bacterial pyoderma, hot spots, infected wounds, and abscesses often involve Staphylococcus species that respond to clindamycin. The drug's ability to penetrate skin tissue is well documented in dogs, which is why it works well for these infections [1][2].

Dental Infections

Clindamycin is one of the most frequently used oral antibiotics in veterinary dentistry. A large US study of dental procedures found that clindamycin, amoxicillin-clavulanate, and amoxicillin were the most common oral antimicrobials used in both dogs and cats [9]. Another study of primary care practices found clindamycin among the top three antimicrobials used around dental procedures in dogs and cats [8].

Dental disease in dogs and cats involves a mix of anaerobic bacteria in the periodontal pockets and gram-positive cocci on the tooth surfaces. Clindamycin covers both, which is why it is popular for periodontal infections, tooth root abscesses, and post-extraction care. A topical clindamycin gel applied to periodontal pockets after professional cleaning significantly reduced pocket depth, gingival index, and bleeding sites in dogs at 90 days [10]. An oral clindamycin regimen given after dental prophylaxis also reduced oral malodor and plaque in dogs with periodontitis [11].

Osteomyelitis

Osteomyelitis is a bacterial infection of the bone. It is serious, painful, and requires long courses of antibiotics that penetrate bone tissue. Clindamycin does penetrate bone, and the classic canine model of posttraumatic osteomyelitis showed that 11 mg/kg twice daily for 28 days was the most effective regimen tested [7]. Bone infections often need weeks to months of treatment, and your veterinarian will likely recheck with imaging and possibly repeat cultures.

Toxoplasmosis

Toxoplasmosis is caused by the protozoan parasite Toxoplasma gondii. Clindamycin is one of the drugs used to treat this infection in cats, usually in combination with other medications. Treatment is typically prolonged, and relapse can occur if the course is stopped too early. Your veterinarian will decide the dose and duration based on the organs involved and the cat's clinical response.

What Clindamycin Does Not Cover

Clindamycin does not treat viral infections, fungal infections, or parasitic infections other than toxoplasmosis. It does not cover most gram-negative aerobic bacteria. It is not effective against Pseudomonas species, and many E. coli strains are resistant.

Clindamycin is also not a reliable choice for methicillin-resistant staphylococcal infections. Resistance rates in S. pseudintermedius are high, and methicillin-resistant strains carry additional resistance genes that reduce the chance of clindamycin working [5][6]. If your pet has a recurrent or nonhealing infection, your veterinarian may recommend a culture and susceptibility panel before continuing clindamycin.

How to Give Clindamycin

Give clindamycin exactly as your veterinarian prescribes. Do not adjust the dose on your own, and do not stop early because your pet looks better. Stopping an antibiotic course early can allow the infection to return and can promote resistance.

Give With Food

Clindamycin should be given with food. This reduces stomach upset and improves absorption. One dog in a clinical study vomited when clindamycin was given on an empty stomach [4]. Giving the dose with a meal is the simplest way to prevent this.

Follow With Water, Especially in Cats

After giving a clindamycin pill to a cat, follow it with water or a small amount of wet food. This flushes the pill into the stomach and reduces the risk of esophageal irritation and stricture. Cats that are not eating well are at higher risk, so talk to your veterinarian if your cat refuses food.

Do Not Crush or Open Capsules Without Asking

Some clindamycin formulations are bitter, and crushing a capsule can make the medication unpalatable. If your pet will not take the capsule, ask your veterinarian about a liquid formulation or a compounding option. Do not mix clindamycin into a full meal if your pet may not finish it, because you will not know how much was actually swallowed.

Missed Doses

If you miss a dose, give it as soon as you remember, unless it is almost time for the next dose. In that case, skip the missed dose and continue with the regular schedule. Do not double up.

Side Effects of Clindamycin in Dogs and Cats

The most common clindamycin dog side effects and cat side effects are gastrointestinal. Vomiting, diarrhea, and anorexia are the three most frequently reported problems. These usually appear within the first few days of treatment and are often mild if the drug is given with food.

Vomiting

Vomiting is the most common reason owners stop clindamycin. In one study, a dog vomited when the drug was given on an empty stomach [4]. If your pet vomits once and is otherwise well, try giving the next dose with a full meal. If vomiting is repeated, if your pet cannot keep water down, or if there is blood in the vomit, stop the medication and call your veterinarian.

Diarrhea

Diarrhea from clindamycin can range from soft stools to severe watery diarrhea. Mild diarrhea may resolve when the drug is given with food. Severe diarrhea, diarrhea with blood, or diarrhea accompanied by lethargy or fever needs veterinary attention. Clindamycin can alter the normal gut bacteria, and in rare cases it can be associated with serious intestinal infections.

Anorexia

Anorexia means your pet stops eating. This is a warning sign because it can lead to dehydration and because it makes the esophageal risk in cats worse. If your pet refuses food for more than 24 hours, stop the medication and call your veterinarian.

When to Stop and Call the Vet

Stop clindamycin and call your veterinarian if you see any of the following:

Repeated vomiting or vomiting that does not stop
Severe or bloody diarrhea
Complete loss of appetite for more than 24 hours
Hives, facial swelling, or difficulty breathing
Drooling, gagging, or signs of esophageal discomfort in a cat
No improvement in the infection after several days of treatment
Any new symptom that worries you

Do not restart the medication on your own. Your veterinarian may switch to a different antibiotic, adjust the dose, or add a medication to settle the stomach.

Which Animals Should Not Receive Clindamycin

Clindamycin must never be given to rabbits, guinea pigs, hamsters, or other small herbivores. These species have a unique gut microbiome that depends on a balance of bacteria, and lincosamide antibiotics can wipe out the beneficial gram-positive bacteria that keep Clostridium species in check. The result is enterotoxemia, a rapid and often fatal overgrowth of toxin-producing bacteria. There is no safe dose of clindamycin for these animals.

Clindamycin should also be avoided in pets with a known allergy to lincosamide antibiotics. Use caution in pets with liver disease, because clindamycin is metabolized in the liver, and in pets with kidney disease. Your veterinarian will weigh the risks and benefits and may adjust the dose or choose a different antibiotic.

Pregnant and nursing pets should only receive clindamycin if the veterinarian decides the benefit outweighs the risk. Do not give leftover clindamycin to another pet, even if the symptoms look similar.

Drug Interactions

Clindamycin can interact with other medications. The most important interactions to know about are:

Neuromuscular blocking agents. Clindamycin can enhance the effect of drugs used during anesthesia that block nerve-to-muscle signals. Tell your veterinarian about all medications your pet takes before any procedure.
Kaolin-pectin antidiarrheal products. These can reduce the absorption of clindamycin. Separate the doses by at least two hours.
Other antibiotics. Clindamycin and chloramphenicol or erythromycin can compete for the same binding site on the bacterial ribosome, which may reduce effectiveness. Your veterinarian will avoid combining these unless there is a specific reason.
Cyclosporine. Clindamycin may increase cyclosporine levels, which can increase the risk of side effects from cyclosporine.

Always tell your veterinarian about every medication, supplement, and herbal product your pet receives. This includes over-the-counter products and anything prescribed by another clinic.

How Clindamycin Compares With Other Antibiotics

Clindamycin is one of several antibiotics commonly used in dogs and cats. The main alternatives are amoxicillin-clavulanate, amoxicillin, cephalexin, and metronidazole.

Amoxicillin-clavulanate and amoxicillin are broad-spectrum penicillins that cover many gram-positive and gram-negative bacteria. They are often used for skin, urinary, and dental infections. Clindamycin has better anaerobic coverage than amoxicillin alone, which is one reason it is favored for dental and deep tissue infections.

Cephalexin is a first-generation cephalosporin that is very effective against staphylococcal skin infections. It does not cover anaerobes as well as clindamycin, so it is less useful for dental infections.

Metronidazole is effective against many anaerobes and some protozoa. It is often combined with other antibiotics for mixed infections. Clindamycin and metronidazole overlap in anaerobic coverage, but clindamycin has better activity against gram-positive cocci.

The choice between these drugs depends on the infection, the culture results if available, the pet's other health conditions, and the owner's ability to give the medication. Clindamycin's advantages are its anaerobic coverage, its penetration into bone and skin, and its twice-daily or once-daily dosing. Its disadvantages are its poor gram-negative coverage, its gastrointestinal side effects, and the esophageal risk in cats.

Antimicrobial Stewardship

Antibiotic resistance is a growing problem in veterinary medicine. Clindamycin resistance in Staphylococcus pseudintermedius is common, and methicillin-resistant strains are even more resistant [5][6]. Using clindamycin only when it is needed, for the correct duration, and at the correct dose helps preserve its effectiveness.

Studies of veterinary dental practices show that antibiotics are sometimes prescribed when they may not be necessary. One study found that systemic antimicrobials were given in 8.8% of dog dental procedures and 7.8% of cat dental procedures even when there was no periodontal disease or extraction [8]. Another study found that 35% of patients at referral dental practices received systemic antibiotics, most commonly amoxicillin-clavulanate, ampicillin-sulbactam, and clindamycin [12]. These findings highlight the importance of using antibiotics judiciously.

If your veterinarian recommends clindamycin, ask why it is the best choice for your pet's specific infection. If a culture and susceptibility test is available, it can guide the decision and reduce the risk of treatment failure.

Questions to Ask Your Veterinarian

Before starting clindamycin, ask these questions:

What infection are we treating, and how was it diagnosed?
Is a culture and susceptibility test needed before we start?
What dose are you prescribing, and how often should I give it?
How long should the course last, and how will we know it is working?
What side effects should I watch for, and when should I stop the medication?
Should I give this with food, and does my cat need a water chaser?
Are there any interactions with my pet's other medications?
When should I schedule a recheck?

Limitations and When to Contact a Veterinarian

This article provides general information about clindamycin for dogs and cats. It does not replace an examination, a diagnosis, or a prescription from a licensed veterinarian. Every pet is different, and the right dose and duration depend on the specific infection, the pet's weight, age, organ function, and other medications.

Contact your veterinarian right away if your pet has repeated vomiting, severe or bloody diarrhea, complete loss of appetite, difficulty breathing, facial swelling, or any sign of esophageal discomfort such as drooling or gagging after a pill. Contact your veterinarian if the infection is not improving after several days of treatment, if it gets worse, or if it comes back after the course is finished.

If you accidentally give too much clindamycin, call your veterinarian or a pet poison control hotline immediately. Do not wait for symptoms to appear.

Frequently Asked Questions

What is the clindamycin dose for dogs?

The typical clindamycin dose for dogs is 5 to 11 mg/kg every 12 hours. Some skin infections are treated with 11 mg/kg once daily. Your veterinarian will set the exact dose based on the infection and your dog's weight.

What is the clindamycin dose for cats?

Cats are dosed at 5 to 11 mg/kg every 12 hours. The dose range is similar to dogs, but cats need the pill given with food and followed by water to reduce the risk of esophageal stricture.

Can I give clindamycin to my dog without food?

No. Give clindamycin with food to reduce stomach upset and improve absorption. Giving it on an empty stomach increases the chance of vomiting.

Why do cats get esophageal strictures from clindamycin?

A dry pill can lodge in a cat's esophagus. Clindamycin irritates the lining, and the resulting inflammation can lead to narrowing and scarring. Giving the pill with food and a water chaser flushes it into the stomach and lowers the risk.

What are the most common clindamycin dog side effects?

The most common side effects are vomiting, diarrhea, and loss of appetite. These are usually mild if the drug is given with food. Severe or persistent symptoms need veterinary attention.

Can clindamycin be given to rabbits or guinea pigs?

No. Clindamycin can cause fatal enterotoxemia in rabbits, guinea pigs, hamsters, and other small herbivores. Never give it to these species.

How long does clindamycin take to work?

Most pets start to improve within a few days, but the full course must be completed. Skin infections may take 2 to 4 weeks, and bone infections can take 4 weeks or longer.

What should I do if my pet vomits after taking clindamycin?

If your pet vomits once and seems well, give the next dose with a full meal. If vomiting repeats, if your pet cannot keep water down, or if there is blood, stop the medication and call your veterinarian.