Management of canine atopic dermatitis using the plant extract PYM00217: a randomized, double-blind, placebo-controlled clinical study.
This study evaluated PYM00217, a proprietary blend of plant extracts, in the management of canine atopic dermatitis (AD). One hundred and twenty dogs were diagnosed with perennial AD on the basis of history, clinical signs, a positive test for perennial allergens and elimination of other dermatoses. Exclusion criteria included antimicrobials within 7 days, antihistamines within 14 days, oral/topical glucocorticoids or ciclosporin within 28 days, and parenteral glucocorticoids, essential fatty acids or immunotherapy within 56 days. Flea control, shampoos and ear cleaners were permitted. Dogs with a minimum canine atopic dermatitis extent and severity index (CADESI) of 25 were randomly allocated to receive PYM00217 (100, 200 or 400 mg kg-1 day-1) or placebo for 12 weeks. The mean reductions in CADESI (intention-to-treat population) were 3.9% (placebo; n=29), 4.4% (100 mg kg-1 day-1; n=30), 23.4% (200 mg kg-1 day-1; n=29) and 8.5% (400 mg kg-1 day-1; n=29). The reduction in the 200 mg kg-1 day-1 group was significant (P<0.01). For dogs with a baseline CADESI>or=50, the mean changes were +10.6% (placebo; n=12), +0.6% (100 mg kg-1 day-1; n=14), -29.3% (200 mg kg-1 day-1; n=14) and -3.4% (400 mg kg-1 day-1; n=15). The 200 mg kg-1 day-1 dose was significantly more effective than placebo (P=0.038). No serious adverse effects were reported. Minor adverse effects seen in 10% (placebo and 100 mg kg-1 day-1), 24% (200 mg kg-1 day-1) and 42% (400 mg kg-1 day-1) of cases were mainly minor gastrointestinal disorders and only five cases required cessation of dosing. Two dogs (one in each of the 100 mg kg-1 day-1 and 200 mg kg-1 day-1 groups) refused to eat the medicated food. In conclusion, PYM00217 at 200 mg kg-1 appears to be an effective, palatable and well-tolerated treatment for canine AD.
Ferguson
Ewan A
EA
The Royal Veterinary College, North Mymms, Hertfordshire, UK.
Littlewood
Janet D
JD
Carlotti
Didier-Noël
DN
Grover
Rob
R
Nuttall
Tim
T
D000818:Animals; D003876:Dermatitis, Atopic / Q000188:drug therapy / Q000662:veterinary*; D003879:Dermatologic Agents / Q000008:administration & dosage / Q000627:therapeutic use*; D004283:Dog Diseases / Q000188:drug therapy* / Q000473:pathology; D004285:Dogs; D004311:Double-Blind Method; D005260:Female; D008297:Male; D008517:Phytotherapy; D010936:Plant Extracts / Q000008:administration & dosage / Q000627:therapeutic use*; D010946:Plants, Medicinal; D012720:Severity of Illness Index; D016896:Treatment Outcome
D003879:Dermatologic Agents; C515330:PYM 00217; D010936:Plant Extracts