Selamectin

Selamectin, sold under the brand name Revolution, among others, is a topical parasiticide and anthelminthic used on dogs and cats.^[2] It treats and prevents infections of heartworms, fleas, ear mites, sarcoptic mange (scabies), and certain types of ticks in dogs, and prevents heartworms, fleas, ear mites, hookworms, and roundworms in cats.^{[citation needed]} It is structurally related to ivermectin and milbemycin.^{[citation needed]} Selamectin is not approved for human use.^{[citation needed]}

Selamectin

Clinical data
Trade names	Revolution, Stronghold, Revolt
Other names	25-cyclohexyl-25-de(1-methylpropyl)-5-deoxy-22,23-dihydro-5-(hydroxyimino)-avermectin B1 monosaccharide[1]
AHFS/Drugs.com	International Drug Names
License data	US DailyMed: Selamectin
Routes of administration	Topical
ATCvet code	QP54AA05 (WHO) QP54AA55 (WHO)
Legal status
Legal status	US: ℞-only[2] EU: Rx-only[3][4][5][6]
Identifiers
CAS Number	220119-17-5 N
PubChem CID	9578507
ChemSpider	16738655 N
UNII	A2669OWX9N
ChEMBL	ChEMBL160777 N
CompTox Dashboard (EPA)	DTXSID6045903
ECHA InfoCard	100.250.168
Chemical and physical data
Formula	C43H63NO11
Molar mass	769.973 g·mol−1
3D model (JSmol)	Interactive image
SMILES C[C@H]1CC[C@]2(C[C@@H]3C[C@H](O2)C/C=C(/[C@H]([C@H](/C=C/C=C/4\CO[C@H]\5[C@@]4([C@@H](C=C(/C5=N/O)C)C(=O)O3)O)C)O[C@H]6C[C@@H]([C@H]([C@@H](O6)C)O)OC)\C)O[C@@H]1C7CCCCC7
InChI InChI=1S/C43H63NO11/c1-24-11-10-14-30-23-50-40-36(44-48)27(4)19-33(43(30,40)47)41(46)52-32-20-31(16-15-25(2)38(24)53-35-21-34(49-6)37(45)28(5)51-35)54-42(22-32)18-17-26(3)39(55-42)29-12-8-7-9-13-29/h10-11,14-15,19,24,26,28-29,31-35,37-40,45,47-48H,7-9,12-13,16-18,20-23H2,1-6H3/b11-10+,25-15+,30-14+,44-36-/t24-,26-,28-,31+,32-,33-,34-,35-,37-,38-,39-,40+,42+,43+/m0/s1 N Key:AFJYYKSVHJGXSN-XHKIUTQPSA-N N
NY (what is this?)  (verify)

Veterinary uses

Selamectin is applied topically.^[2] It is not miscible in water.^[2]

Mode of action

Selamectin disables parasites by activating glutamate-gated chloride channels at muscle synapses.^[7] Selamectin activates the chloride channel without desensitization, allowing chloride ions to enter the nerve cells and causing neuromuscular paralysis, impaired muscular contraction, and eventual death.^[7]

The substance fights both internal and surface parasitic infection.^{[citation needed]} Absorbed into the body through the skin and hair follicles, it travels through the bloodstream, intestines, and sebaceous glands;^{[citation needed]} parasites ingest the drug when they feed on the animal's blood or secretions.^{[citation needed]}

Side effects

Selamectin has been found to be safe and effective in a 2003 review.^[8]

Selamectin has high safety ratings, with less than 1% of pets displaying side effects^{[citation needed]}. In cases where side-effects do occur, they most often include passing irritation or hair loss at the application site. Symptoms beyond these (such as drooling, rapid breathing, lack of coordination, vomiting, or diarrhea) could be due to shock as a result of selamectin killing heartworms or other vulnerable parasites present at high levels in the bloodstreams of dogs.^{[citation needed]} This would be a reaction due to undetected or underestimated infections prior to using the medication, rather than an actual allergic reaction to the drug itself.^{[citation needed]}

Society and culture

Brand names

Selamectin is sold under various brand names including Selehold, manufactured by KRKA, Selarid manufactured by Norbrook Laboratories Limited, Revolution and Stronghold manufactured by Zoetis, Revolt manufactured by Aurora Pharmaceuticals, and Senergy manufactured by Virbac.

Similar products

Main rival products for dogs include ivermectin (trade names Stromectol, Ivermec and others) or milbemycin oxime (Interceptor) for heartworms, imidacloprid and moxidectin (Advocate), fipronil (Frontline) or lufenuron (Program) for fleas, or the combination milbemycin oxime/lufenuron (Sentinel) for both.^{[citation needed]}