Could Problem In Thyroid Gland Be Due To The Use Of Ecstasy?

Can the use of ecstasy contribute to problems with the thyroid? I have a friend who has been feeling physically fatigued and ill for months now. He has been to the doctors and they have told him nothing is wrong with him. But I am absolutely certain he has not told them he has dabbled in ecstasy numerous times over the past 12 months.