I would want to know, if it is permissible to use Penis enlargement pills to have big penis to satisfy ones wife.

All perfect praise be to Allaah, The Lord of the Worlds. I testify that there is none worthy of worship except Allaah, and that Muhammad is His slave and Messenger. We ask Allaah to exalt his mention as well as that of his family and all his companions.

It is permissible to take the pills which you mentioned in the question if their use does not cause any harm, as in principle, it is permissible to seek treatment because when the Prophet was asked by the Bedouins whether or not they are permitted to seek treatment, he replied: "O Slaves of Allaah! Seek treatment." [Abu Daawood and At-Tirmithi]

We have already issued Fatwa 88614 clarifying that is permissible in principle to treat the small size of the penis. What we mentioned in the above Fatwa is not contradicting the evidence which proves that it is forbidden to change Allaah's Creation. Indeed, the matters in which the prohibition is mentioned are either castration, plucking the eyebrows, tattooing, separating between the teeth, putting a wig, and the like, as there is interference in all these matters without any necessity or dire need.

Therefore, enlarging the size of the penis by taking a specific medicine, is considered among making something grow and there is no interference of the person in it, hence, it is permissible if it does not cause any harm. 

Allaah Knows best.