If your doctor, who is familiar with your treatment progress, has advised stopping Combutol (Ethambutol), it is generally safe to follow their guidance. Ethambutol is often used during the initial phase of TB treatment and may be stopped once your doctor is confident that the remaining medications can complete the treatment effectively. Do not stop or restart any medicine on your own, and make sure to continue all other prescribed TB drugs exactly as directed to fully cure the infection and prevent resistance. If you have any concerns about your treatment plan, discuss them with your doctor.