Abstract: Tablets capable of producing a gas in a controlled manner for its preferred use in apparatuses intended for the administration of medicaments or serums, such that the gas exerts the control of the rate of release of the serum or medicament to the patient. The tablets comprise an emulsified polymer matrix (oil phase and hydrophilic phase) that allows that the reaction between an acid and a base or an enzymatic reaction take place in a controlled manner, especially with a constant gas evolution rate during the useful life of use of the tablet, thanks the protection that the emulsified polymer matrix (containing oil) offers.