In about 2/3 of the cases studied (152 patients), the combination of deprenyl and the substitution-therapy has a favourable effect as it tends to normalize motor activity. Although the administering of deprenyl renders neither L-Dopa nor the decarboxylase inhibitor superfluous, their side effects can be slightly reduced as their dose is reduced. Therefore it is advised to give all patients a trial with this drug.

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AimTo determine the contribution of clinical trials to the gross domestic product (GDP) in Hungary.MethodsAn anonymous survey of pharmaceutical companies and clinical research organizations (CROs) was conducted to estimate their clinical trial-related employment and revenues. Clinical trial documents at the National Institute of Pharmacy (NIP) were analyzed to estimate trial-related revenues at health care institutions and the value of investigational medical products (IMPs) based on avoided drug costs. Financial benefits were calculated as 2010 US $ purchasing power parity (PPP) values.ResultsClinical trials increased the revenue of Hungarian health care providers by US $165.6 million. The value of IMPs was US $67.0 million. Clinical trial operation and management activities generated 900 jobs and US $166.9 million in revenue among CROs and pharmaceutical companies.ConclusionsThe contribution of clinical trials to the Hungarian GDP in 2010 amounted to 0.2%. Participation in international clinical trials may result in health, financial, and intangible benefits that contribute to the sustainability of health care systems, especially in countries with severe resource constraints. Although a conservative approach was employed to estimate the economic benefits of clinical trials, further research is necessary to improve the generalizability of our findings.