Treating anaplasmosis is inexpensive if the disease is caught in the early stages and there are no additional complications. Your vet can write you a prescription for doxycycline; the cost at an online pharmacy depends on how much your dog weighs but can be $20 or less. If joint disease is advanced, additional medications, such as pain medication or joint supplements, may be needed. If you have pet insurance that covers illnesses, this medication will probably be covered. Treating anaplasmosis is inexpensive if the disease is caught in the early stages and there are no additional complications. Your vet can write you a prescription for doxycycline; the cost at an online pharmacy depends on how much your dog weighs but can be $20 or less. If joint disease is advanced, additional medications, such as pain medication or joint supplements, may be needed. If you have pet insurance that covers illnesses, this medication will probably be covered.