Quest Plus Gel Horse Wormer combines 2% moxidectin and 12.5% praziquantel for the treatment and control of large and small strongyles, encysted cyathostomes, ascarids, pinworms, hair worms, large mouth stomach worms, stomach bots and tapeworms. One dose also suppresses strongyle egg production through 84 days. Quest Plus Gel may be used in horses and ponies 6 months of age and older. Testing has not been done in breeding mares or stallions. Each Quest Plus Gel sure-dial syringe is calibrated in 50lb increments, and treats up to 1250 lbs body weight.