Dear user, welcome to healthcare magic.
There are no enough data about this drug, but it seems to be harmless regarding the fertilization capacity of your husband and any effect of course is not permanent.
I am interested to know what causes you not getting pregnant as I can give you some advice according to your case. The only advice I will give you now is " don't waste time", because age is a major determinant of fertility
I wish you good luck and getting pregnant soon.
Dr. Ahmed Bahaa.