Dolasetron for Cats: Indications, Dosing, and Limitations

Dolasetron is a drugs traditionally used for vomiting and nausea in human and animal sufferers. It’s discontinued within the US however should still be obtainable in different nations. Photograph Nature Journey / Shutterstock.com

Dolasetron is a much less widespread however potential choice for treating nausea and vomiting in cats. Though at the moment discontinued in america, it could nonetheless be obtainable outdoors the US, although it additionally has dose-related limitations for cats. On this article, you’ll be taught the way it works, when it could be helpful for cats, and extra details about its limitations.

Dolasetron for Cats

Remedy Kind:

5-HT3 (serotonin) receptor antagonist

Prescription Required?:

Sure

Life Stage:

None specified

Obtainable Dosages:

All obtainable dosing kinds within the US have been discontinued however could also be obtainable outdoors the US. Dolasetron is available in each 50mg and 100mg pill sizes, making it unsuitable for sensible dosing for cats. It may be compounded into extra applicable dosing sizes. The injectable kind comes as a 20mg/ml focus.

About Dolasetron for Cats

Dolasetron has traditionally been used to assist deal with nausea and vomiting. Melina Grin / Cats.com

Dolasetron is a 5-HT3 receptor antagonist. 5-HT3 is a particular type of serotonin. 5-HT3 receptors are discovered largely within the gastrointestinal tract and the vomiting heart of the mind. By stopping serotonin from binding to the receptor, dolasetron might help scale back vomiting and nausea each centrally within the mind and through receptors within the GI tract.

Dolasetron is similar to ondansetron (Zofran). One major distinction is the dosing interval. Dolasetron could possibly be used as soon as each 24 hours whereas ondansetron is dosed each 12 hours.

Traditionally dolasetron was most popular over ondansetron in some circumstances the place the necessity for much less frequent dosing was useful for veterinary sufferers.

Each medicines have been used efficiently to cut back nausea related to chemotherapy medicines. That is believed to be partly as a result of launch of serotonin from cells within the small gut that contributes to vomiting attributable to chemotherapy medicines.

Dosing Info for Cats

Dolasetron’s massive pill measurement makes dosing with the industrial kind impractical for cats. Getting medicines compounded into smaller pill sizes or different kinds might help with correct dosing. Doctorj_CM / Shutterstock.com

If dolasetron is accessible the place you reside, you’ll need to debate together with your veterinarian essentially the most applicable dose and type of the remedy to make use of. Traditionally, it has been dosed at about 0.5-1mg/kg. For a median 10lb cat, that is about 2.5-5mg. With the smallest industrial pill measurement being 50 mg, even breaking the pill into quarters wouldn’t present a sufficiently small dose.

Compounding this remedy right into a liquid or smaller pill kind would be the solely approach to appropriately dose it, which your vet would wish that will help you with.

The way to Administer Dolasetron to Cats

As talked about, the pill kind may be very impractical, even when break up into smaller items, as a result of massive measurement of the commercially obtainable tablets.

Many medicines might be compounded into flavored chewable tablets, treats, or liquid formulations. When discussing compounding choices together with your vet, you may talk about which dosing choice would work greatest to your cat.

Facet Results of Dolasetron for Cats

Dolasetron has seemed to be a well-tolerated remedy in pets.

In people, sure coronary heart rhythm abnormalities have been related to widening of the QRS advanced and prolongation of the PR and QT intervals. The injectable kind particularly was discovered to contribute to those adjustments and a doubtlessly deadly arrhythmia referred to as torsades de pointes. These cardiac dangers have been a serious motive the FDA phased out dolasetron by 2016.

Different unwanted side effects seen in people included complications, dizziness, and elevated urge for food.

The unwanted side effects noticed in people weren’t particularly famous to be a priority in pets, although there are far fewer research and far much less medical expertise with dolasetron in pets in contrast with its shut relative, ondansetron.

Overdose and Emergencies

Whereas dolasetron has no important adversarial reported results in cats, adversarial results in people seem like dose-dependent. There may be additionally very restricted examine knowledge for pets.

When you suspect your cat obtained an overdose of dolasetron, it’s greatest to instantly contact a number of of the next for recommendation:

• Your veterinarian
• ASPCA Animal Poison Management Heart (1-888-426-4435)
• Pet Poison Helpline (1-855-764-7661)

Potential Drug Interactions With Dolasetron

The next record represents potential drug interactions with dolasetron. Except particularly famous, utilizing these medicines collectively will not be essentially contraindicated, however concurrent use must be thought-about rigorously with veterinary steering.

The place serotonin syndrome is talked about, this can be a situation the place excessive ranges of serotonin accumulate within the physique and trigger a wide range of medical indicators. These could embrace digestive upset, muscle tremors, agitation, altered mentation, and seizures. Serotonin syndrome most frequently happens as a result of cumulative results of medicines that may alter serotonin ranges within the physique. This is a vital motive to all the time inform your veterinarian of medicines your pet is taking and to not dose your cat with human medicines from dwelling with out consulting with a vet first.

• Amiodarone: use collectively could improve danger for additional prolonging the QT interval.
• Apomorphine: use collectively could result in low blood strain and lack of consciousness and is contraindicated in folks. Apomorphine is utilized in canine to induce vomiting however will not be usually utilized in cats, as it’s ineffective.
• Atenolol: could scale back the clearance and improve blood ranges of hydrodolasetron (dolasetron’s energetic metabolite kind).
• Azole antifungals (intraconazole): could inhibit ondansetron metabolism and lengthen the QT interval
• Buprenorphine: use collectively could improve danger of serotonin syndrome.
• Cisapride: use collectively could improve danger for prolonging the QT interval.
• Fluoroquinolone antibiotics (marbofloxacin, pradofloxacin): use collectively could improve danger for prolonging the QT interval.
• Macrolide antibiotics (erythromycin): use collectively could improve the danger for cardiotoxicity.
• Metronidazole: use collectively could improve danger for prolonging the QT interval.
• Phenobarbital: can scale back hydrodolasetron (energetic metabolite type of dolasetron) blood ranges.
• Phenothiazines (acepromazine): use collectively could improve the danger for cardiotoxicity.
• Quinidine: use collectively could improve the danger for prolonging the QT interval.
• Sotalol: use collectively could improve the danger for prolonging the QT interval.

The way to Retailer Dolasetron

The commercially obtainable tablets must be saved at room temperature (68-77 levels F) and protected against gentle.

If dolasetron is compounded into a unique oral formulation, the compounding pharmacy must be contacted for any questions on storage or shelf life.