PT 141 was developed for its aphrodisiac effects. This peptide has been shown to have a substantial effect on libido, generating sexual arousal in both men and women within minutes of administration. It has been shown to be effective in treating erectile dysfunction, even in men who have not responded to other ED treatments, such as Viagra. This peptide is also able to cross the blood-brain-barrier, bypassing the vascular system and acting at the level of the central nervous system. This property gives PT 141 an advantage over traditional ED drugs, which can decrease blood pressure to dangerous levels. This peptide can be administered as a nasal spray, making its use convenient and discreet.