Each 100 mg BOSULIF tablet contains 103.40 mg of bosutinib monohydrate, equivalent to 100 mg of bosutinib; each 500 mg BOSULIF tablet contains 516.98 mg of bosutinib monohydrate, equivalent to 500 mg of bosutinib.
Having said that, If your dog is itching and scratching all year long, then it's most likely due to either a food allergy or an allergy to something that is present all year such as dust mites or possibly even mange. In either case, you'll probably need more help to determine the cause which you can find here.
Allergies. A classic symptom of a dog with allergies is itchy pads. The inflammation caused by the allergies itches and the dog will constantly chew and lick its paws to try and relieve the itchiness. Allergies can be caused by many different things but you can start with the dog's bed, toys and environment.