Libido in a vial. This stuff is incredible for improving libido and it works in both men and women! If you’ve ever struggled with low libido this is the product for you. The most common complaint is that PT-141 has a tendency to cause nausea and or headaches. PT-141 is a potential remedy for the treatment of female sexual dysfunction and male erectile dysfunction. Studies have shown that PT-141 does not act on the vascular system, but may increase sexual desire through the nervous system.