AQUEOUS PREPARATION CONTAINING ANTIVIRAL AGENT HAVING PURINE OR PYRIMIDINE SKELETON

摘要

An aqueous preparation which is used as a liquid preparation such as an eye drop or nasal drop for infectious diseases attributable to herpesvirus, etc., contains as the active ingredient an antiviral agent having a purine or pyrimidine skeleton, and is prevented from untergoing crystal precipitation in a physiologically acceptable pH range. The aqueous preparation contains a crystal precipitation inhibitor to keep the drug dissolved in the physiologically acceptable pH range and thus prevent crystal precipitation.