SUPRECUR Nasal spray solution Ref.[28031] Active ingredients: Buserelin

Source: Medicines & Healthcare Products Regulatory Agency (GB)  Revision Year: 2020  Publisher: Neon Healthcare Limited, Mill Studio Business Centre, Crane Mead, Ware, Hertfordshire, SG12 9PY, United Kingdom

5.1. Pharmacodynamic properties

Pharmacotherapeutic Group: Hormones and Related Agents
ATC Code: L02AE01

Buserelin is a synthetic peptide. It is a superactive analogue of natural gonadotrophin releasing hormone (gonadorelin, LHRH or GNRH). After an initial stimulation of gonadotrophin release, it down-regulates the hypothalamic-pituitary-gonadal axis.

5.2. Pharmacokinetic properties

The intra-nasal absorption rate of buserelin is about 3%. Metabolic inactivation by peptides occurs in the liver and kidney. The drug is also inactivated by pituitary membrane enzymes. After intra-nasal administration to humans, buserelin is excreted for more than 8 hours in the urine. Virtually all the serum fraction, and half the urine fraction of buserelin, are present as the parent drug.

The bioavailability of buserelin after nasal administration is not adversely influenced by the presence of rhinitis.

5.3. Preclinical safety data

None of clinical relevance.

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