title: Influence of Tiopronin on the Metabolism of Alcohol in Healthy Subjects.
abstract: Drug safety- and drug-alcohol interaction studies have mainly been conducted for frequently prescribed drugs with high financial interests. Orphan drugs such as tiopronin (ORPHA25073) are often neglected in terms of clinical research. Tiopronin is a drug that is mainly used for the treatment of cystinuria. In this study, the interaction of tiopronin regarding the metabolism of alcohol (primary objective), and the safety of tiopronin in combination with alcohol was tested in healthy volunteers.In this randomised, double-blind, cross-over study, 13 healthy subjects received 500 mg tiopronin or an identical looking placebo 1 h before the intake of 0.8 g of alcohol per kg of bodyweight. Blood alcohol concentrations were measured over the course of 12 h after consumption. The experiment was repeated 7 days later with the previous placebo group receiving the active drug and vice-versa. Changes in blood alcohol AUC and elimination rate k were analysed using a 2-tailed t-test. Further acetaldehyde concentrations were measured. Additionally, the concentration ability of the subjects was tested and any adverse effects were recorded.There was no significant change in blood alcohol or acetaldehyde concentration. Significant differences in concentration tests refer presumably to learning effects. No serious adverse event occurred. All adverse events were reversible and there was no significant difference in occurrence between drug and placebo group.It was demonstrated that tiopronin does not affect the metabolism of alcohol. Intake of tiopronin in combination with alcohol has no safety implications on healthy subjects.
authors.affiliation: Institute of General Practice, Gemeinschaftspraxis Dr. Pelzer, Dr. Dr. Kroll, University Hospital Düsseldorf, Kleve, Germany.
authors.forename: Friederike
authors.initials: F
authors.lastname: Nass
authors.affiliation: Institute of Biometry, Hannover Medical School, Hannover, Germany.
authors.forename: Berthold
authors.initials: B
authors.lastname: Schneider
authors.affiliation: Institute of General Practice, University Hospital Düsseldorf, Düsseldorf, Germany.
authors.forename: Stefan
authors.initials: S
authors.lastname: Wilm
authors.affiliation: Institute of Forensic Medicine, University Hospital Düsseldorf, Düsseldorf, Germany.
authors.forename: Bernd
authors.initials: B
authors.lastname: Kardel
authors.affiliation: Pharmakovigilanz, MIT Gesundheit GmbH, Kleve, Germany.
authors.forename: Elisabeth
authors.initials: E
authors.lastname: Gabor
authors.affiliation: Pharmakovigilanz, MIT Gesundheit GmbH, Kleve, Germany.
authors.forename: Fabian
authors.initials: F
authors.lastname: Merges
authors.affiliation: Institute of General Practice, Gemeinschaftspraxis Dr. Pelzer, Dr. Dr. Kroll, Kleve, Germany.
authors.forename: Michael
authors.initials: M
authors.lastname: Kroll
mesh_terms: D000079:Acetaldehyde / Q000097:blood; D000328:Adult; D001288:Attention; D018592:Cross-Over Studies; D004311:Double-Blind Method; D000431:Ethanol / Q000008:administration & dosage / Q000097:blood / Q000378:metabolism* / Q000494:pharmacology; D005260:Female; D018565:Food-Drug Interactions; D064368:Healthy Volunteers; D006801:Humans; D008297:Male; D009965:Orphan Drug Production; D008625:Tiopronin / Q000008:administration & dosage / Q000009:adverse effects / Q000494:pharmacology*; D055815:Young Adult
chemical_list: D000431:Ethanol; D008625:Tiopronin; D000079:Acetaldehyde