THE PRESENT INVENTION RELATES TO A SOLID ORAL PHARMACEUTICAL COMPOSITION COMPRISING AN EFFECTIVE AMOUNT OF RIBAVIRIN OR ITS PHARMACEUTICALLY ACCEPTABLE SALTS, ESTERS, SOLVATES, POLYMORPHS, ENANTIOMERS OR MIXTURES THEREOF THE SOLID ORAL DOSAGE FORM IS PREPARED BY NON-AQUEOUS WET GRANULATION METHOD. THE INVENTION ALSO RELATES TO A PROCESS FOR PREPARATION OF A PHARMACEUTICAL TABLET DOSAGE FORM COMPRISING AN EFFECTIVE AMOUNT OF RIBAVIRIN WHEREIN, THE DOSAGE FORM IS SUBSTANTIALLY FREE OF OTHER POLYMORPHIC FORMS.