title: Theophylline disturbs sleep mainly in caffeine-sensitive persons.
abstract: In order to study effects of theophylline on sleep, a randomised double-blind cross-over study with slow release theophylline vs. placebo was performed on 13 healthy male volunteers (mean age 24 years), eight of whom were considered caffeine-sensitive and five caffeine-insensitive. A sleep diary was filled in during the entire period. At the end of each 2 week study period a sleep questionnaire was filled in and a sleep recording was conducted. Seven of the eight caffeine-sensitive persons reported that their sleep was disturbed during the theophylline period, while none of the five caffeine-insensitive experienced any difference between the periods. Analysis of the sleep diaries (mean +/- SD) revealed a significant increase in sleep latency (16 +/- 11 vs 4 +/- 7 min) and decrease in sleep efficiency (95 +/- 3 vs 98 +/- 3%) among the caffeine-sensitive persons during the theophylline period compared with the placebo period, while no such difference was found among the caffeine-insensitive. We conclude that theophylline seems to disturb sleep mainly in caffeine-sensitive persons.
authors.affiliation: Department of Lung Medicine, Uppsala University, Sweden.
authors.forename: C
authors.initials: C
authors.lastname: Janson
authors.forename: T
authors.initials: T
authors.lastname: Gislason
authors.forename: M
authors.initials: M
authors.lastname: Almqvist
authors.forename: G
authors.initials: G
authors.lastname: Boman
mesh_terms: D002110:Caffeine / Q000009:adverse effects*; D004311:Double-Blind Method; D006801:Humans; D008297:Male; D012893:Sleep Wake Disorders / Q000139:chemically induced*; D011795:Surveys and Questionnaires; D013806:Theophylline / Q000009:adverse effects* / Q000097:blood
chemical_list: D002110:Caffeine; D013806:Theophylline