Hi, thanks for the query to H.C.M.
Frankly I would like to say that " TOSTRAN " 2% gel contains testosterone
hormone as its active ingredient and it is meant only for MALE ( men).
In any condition it is not recommended for females.
When this drug prescribes in men , however few men may develops gynaecomastia
(enlargement of chest seems like breast in man) .
So you better judge what is good for your sister.
Regards Dr. HET