Abstract: A parathyroid hormone-containing emulsion for nasal administration, comprising parathyroid hormone as the active ingredient, at least, azacycloalkane derivative of the general formula [1]: ##STR1## wherein R is alkyl, m is an integer of 2-4, and n is an integer of 1-15, provided that R is alkyl of C.sub.5-11 in case where n is 1-3, as the absorption promotor, glycyrrhizic acid or its non-toxic salt, and a suitable amount of water.

Abstract: The present invention is to provide emulsion preparations for nasal administration containing calcitonins, which are safely and effectively administrated compared with the conventional calcitonin preparations. The emulsions are prepared by using a calcitonin as the active ingredient, an azacycloalkane derivative as the absorption promotor such as 1-[2-(decylthio)ethyl] azacyclopentan-2-one, and glycyrrhizic acid or its salt.

Abstract: A nasal administration powder composition containing a physiologically active peptide as an active ingredient can be efficiently absorbed through nasal mucosa by the addition of a water-soluble organic acid as an absorption promoter. This composition may further contain a diluent. The water-soluble organic acid used as absorption promoter includes, for example, at least one of succinic acid, tartaric acid, citric acid, fumaric acid, maleic acid, malonic acid, glutaric acid, adipic acid, malic acid, L-glutamic acid, L-aspartic acid, gluconic acid and glucuronic acid.