According to my drug reference, the half-life of 6
mercaptopurine is very short - on the order of hours. If he has been off the medication for 45 days, it is unlikely that any adverse effect will be caused by the medication.
I am unaware of this medication causing a low sperm count, although these questions should be discussed with your personal physician. A sperm analysis can be discussed if this is a continued concern.
Followup with your personal physician is
essentialEssential balance
Essential hypertension
Essential tremor.
This answer is not intended as and does not substitute for medical advice - the information presented is for patient education only. Please see your personal physician for further evaluation of your individual case.
Thanks,
Kevin, M.D.