The invention aims at minimizing the risks of release of the dose associated with the concurrent consumption of alcohol and certain pharmaceutical or dietary forms with modified release. The invention concerns an oral form comprising reservoir-type microparticles, with modified release of at least one active principle. The invention is characterized in that it is resistant to the immediate release of the dose of active principle in the presence of alcohol. In particular, the inventive oral form is characterized in that the releasing time of 50% of the active principle, in an alcohol-containing solution is not reduced by more than 3 times compared to the releasing time of 50% of the active principle in an alcohol-free aqueous medium. The form comprises an agent D which is a pharmaceutically acceptable compound of which the hydrating or solvating speed and capacity is higher in an alcohol-free aqueous medium than in an alcohol-containing solution.
