| abstract |
A pharmaceutical composition comprising, as an active ingredient, a peptide derived from a PACAP peptide or a VIP peptide or a pharmaceutically acceptable salt thereof. According to the present invention, a PACAP / VIP derivative that suppresses tautomerization in a solution state and can be used clinically for a long period of time is provided. The peptides are effective in improving symptoms of diseases such as degenerative neurodegenerative diseases, erectile dysfunction and bronchial asthma. |