A Pharmaceutical Form comprising: (a) A physiologically effective substance； as the CaseOne or several adjuvants physiologically compatible； (b) a natural or Synthetic Polymer (c)； and since the case (d) natural WaxSemi Synthetic or Synthetic Pharmaceutical Form； presenting a Breaking Strength of at least 400 N and Releasing under Physiological conditions The physiologically effective substance (a) at least.By steadily.According to claim 7: a Pharmaceutical Form of the preceding Claims, wherein the polymer (c) selected from the group consisting of Poly (Oxide, Polyethylene, alquileno)Polypropylene, Poly (Vinyl Chloride), polycarbonate, Polystyrene, Polyacrylate, its copolymers and their blends.According to claim 8: a Pharmaceutical Form of the preceding Claims,(c) wherein the polymer is a Poly (Oxide alquileno) selected from the group consisting of Poly (methylene oxide), Poly (ethylene oxide), Poly (Propylene Oxide) and its copolymersThe block copolymers and their blends.According to claim 20: a Pharmaceutical Form of the preceding Claims,Wherein the substance () is a drug selected from the group consisting of agents for the treatment and Prevention of Diseases of the Digestive System agents and metabolism；For the treatment and Prevention of Diseases of the blood and hematopoietic organs； Agents for the treatment and Prevention of Diseases of the Cardiovascular System dermatol u00f3 agents；Analogue； Agents for the treatment and Prevention of Diseases of the Apparatus genitounitario and systemic hormonal preparations； sex hormone； sex hormones and insulin antiinfecc excluded；Iosos for systemic use； antineoplastic and immunomodulating agents, agents for the treatment and Prevention of Diseases of the muscular and Skeletal System； Agents for the treatment and the expectedVeness of nervous system diseases； antiparasitic agents,Insecticides and repellents； Agents for the treatment and Prevention of respiratory tract diseases； Agents for the treatment and Prevention of D
