good evening . thnxs for your Question .   In human reproduction science till date no medicine available for increase lenghth of penis. regarding thickness its depend upon how much vasodilatation occur at time of sexual excitement. alone with hormones testoterone and neurological impluse.  medicine that u took i think its vasodilator. but not sure abt it .  so no woory if ur penis lenghth short  u will enjoy you sex life fully. regarding your premature ejeculation you should consult sexologist . that will help u.   thnxs