A medical component comprising a human parathyroid hormone peptide or its
derivative, and acetic acid contained at a concentration less than its
chemical equivalent with respect to the human parathyroid hormone peptide
or to its derivative. Since in the medical component acetic acid, which
is present as a salt of or attached to the peptide or its derivative, has
been reduced to an amount less than chemical equivalent with respect to
the human parathyroid hormone peptide or its derivative, a medical
component, which is highly stable and will ensure an excellent use
feeling when introduced into a pharmaceutical composition, is obtained.