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.
A dog itching and scratching will automatically make you think of fleas. However, there are several other factors that can cause skin itchiness, ranging from allergies to hormonal problems or stress. Allergies are the second most common cause of itchiness in dogs. Inhalant allergens such as chemicals, dust or pollen can all cause itchiness.