The present invention provides novel solid pharmaceutical dosage forms of valganciclovir hydrochloride for oral administration, after being constituted in water.These novel pharmaceutical dosage forms are useful in the treatment or control of viruses such as herpes simplex virus and cytomegalovirus.Cette invention concerne des formes posologiques solides dhydrochlorure de valganciclovir à prise orale après constitution dans leau. Ces nouvelles formes posologiques pharmaceutiques permettent de traiter et de combattre certains virus tels que le virus de lherpès simplex et le cytomégalovirus.