The present invention relates to a monolayer tablet for use in the treatment of tuberculosis comprising a mixture of: - granules comprising isoniazid, pyrazinamide, ethambutol or a pharmaceutically acceptable salt thereof and at least one granulation binder, - rifampicine in powder form, - extragranular excipients, wherein all of the granules have a particle size that is less than 0.599 mm, preferably less than 0.5 mm, more preferably less than 0.422 mm, and to its process of preparation.
