Aqueous preparation containing oligopeptides and etherified cyclodextrin

Aqueous pharmaceutical preparation of oligopeptides, comprising an oligopeptide of the formula I

• cyclo-(n-Arg-nGly-nAsp-nD-nE) (I)
• in which
• D and E each, independently of one another, denote Gly, Ala, β-Ala, Asn, Asp, Asp(OR), Arg, Cha, Cys, Gln, Glu, His, Ile, Leu, Lys, Lys(Ac), Lys(AcNH2), Lys(AcSH), Met, Nal, Nle, Orn, Phe, 4-Hal-Phe, homoPhe, Phg, Pro, Pya, Ser, Thr, Tia, Tic, Trp, Tyr or Val, where the said amino acid radicals may also be derivatised,
• R denotes alkyl having 1-18 C atoms,
• Hal denotes F, Cl, Br, I,
• Ac denotes alkanoyl having 1-10 C atoms, aroyl having 7-11 carbon atoms or aralkanoyl having 8-12 C atoms,
• n denotes a hydrogen atom or an alkyl radical R, benzyl or an aralkyl radical having 7-18 C atoms on the alpha-amino function of the corresponding amino acid radical,
• with the proviso that at least one amino acid radical has a substituent n, where n denotes R,
• and where, if they are radicals of optically active amino acids and amino acid derivatives, both the D and L forms are included, and physiologically acceptable salts thereof,
• and an etherified β-cyclodextrin having a water solubility of greater than 1.8 mg/ml of water