My oncologist prescribed it to me just recently; 30 mg, which I took late at night since it is a timed release capsule. When I awoke in the morning, I felt very lightheaded. It didn’t start to leave until 11:00 pm the next night. I had taken it at midnight the night before. That is one of the side effects when taking this. That was two nights ago. So I haven’t taken anymore. My pharmacy told me today that there is a smaller dosage; 20 mg that is available. I’m going to call my oncologist on Monday to have them prescribe that dosage of 20 mg. Then I will see if I can tolerate it. I just don’t want to have to go through being lightheaded all day; and for god only knows how many days of it.