Is it okay for my treatment to stop Ethambutol after just two months even though my chest X-ray is better and my doctor said to keep taking Isoniazid, Rifampicin, and Pyrazinamide? I mean, I didn't have positive sputum results or a Mantoux test, but my CT scan showed TB and I had a constant cough for a long time. I'm a bit worried about changing the meds too soon.

yes it is normal, there might be some side effect related to ethambutol