title: False-positive results in urine drug screening in healthy volunteers participating in phase 1 studies with efavirenz and rifampin.
authors.forename: Charles J L
authors.initials: CJ
authors.lastname: la Porte
authors.forename: Jacqueline A H
authors.initials: JA
authors.lastname: Droste
authors.forename: David M
authors.initials: DM
authors.lastname: Burger
mesh_terms: D000480:Alkynes; D019380:Anti-HIV Agents / Q000627:therapeutic use / Q000652:urine; D000904:Antibiotics, Antitubercular / Q000627:therapeutic use / Q000652:urine; D048588:Benzoxazines; D017321:Clinical Trials, Phase I as Topic; D003521:Cyclopropanes; D013759:Dronabinol / Q000652:urine; D016903:Drug Monitoring / Q000379:methods / Q000592:standards*; D005189:False Positive Reactions; D006801:Humans; D010078:Oxazines / Q000627:therapeutic use / Q000652:urine*; D012293:Rifampin / Q000627:therapeutic use / Q000652:urine*
chemical_list: D000480:Alkynes; D019380:Anti-HIV Agents; D000904:Antibiotics, Antitubercular; D048588:Benzoxazines; D003521:Cyclopropanes; D010078:Oxazines; D013759:Dronabinol; C098320:efavirenz; D012293:Rifampin