A pharmaceutical form for the parenteral administration comprising dissolved or dispersed form of peptides prone to aggregation selected from cetrorelix, antarelix, antide, A-75998, ganirelix and Nal-Glu antagonist. In this form, the peptides are presented in the form of their acetate, gluconate, glucuronate, lactate, citrate, ascorbate, benzoate or phosphate salts, it is also present one of the just-mentioned acids as free acids, and, if appropriate, further additives and excipients from the class consisting of the acids, surface-active substances, polymers, lipids or sugars. It is described the form for use in the treatment of benign and malignant disease or for the treatment of sex hormone-dependent conditions.A pharmaceutical form for the parenteral administration comprising dissolved or dispersed form of peptides prone to aggregation selected from cetrorelix, antarelix, antide, A-75998, ganirelix and Nal-Glu antagonist. In this form, the peptides are presented in the form of their acetate, gluconate, glucuronate, lactate, citrate, ascorbate, benzoate or phosphate salts, it is also present one of the just-mentioned acids as free acids, and, if appropriate, further additives and excipients from the class consisting of the acids, surface-active substances, polymers, lipids or sugars. It is described the form for use in the treatment of benign and malignant disease or for the treatment of sex hormone-dependent conditions.