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.
The most common skin problem in dogs is caused by allergies. Fortunately, there are several ways to manage itching and allergies in dogs. Sometimes, you can do certain things at home to prevent or ease mild itching before a secondary infection occurs. In other cases, you will need to consult with your veterinarian.