Paul NewtonAndrew SimpsonSompon WanwimolrukPius MaliakalLeopoldo VillegasDaniel KuypersNicholas J. WhiteMahidol UniversityJohn Radcliffe HospitalUniversity of OtagoShoklo Malaria Research UnitMinistry of Health2018-09-072018-09-072001-05-28European Journal of Clinical Pharmacology. Vol.57, No.2 (2001), 111-113003169702-s2.0-0035036711https://repository.li.mahidol.ac.th/handle/20.500.14594/26784Objectives: The objective was to determine whether or not dietary salt intake affects the relative bioavailability of oral quinine. Salt intake has been shown to alter quinidine bioavailability. Methods: The pharmacokinetic properties of oral quinine sulphate (600 mg salt) were investigated in seven healthy Caucasian volunteers, in a randomised, crossover study, on low- and high-salt diets. Plasma quinine concentrations were measured by high-performance liquid chromatography (HPLC) and the 24-h urinary sodium excretion was assayed. Results: Although the 24-h urine sodium excretion was significantly higher when the volunteers were on a high-salt diet, there were no significant differences in quinine AUC0-∞, tmax, and Cmaxafter the two diets. The median (range) quinine elimination half-life was significantly shorter after a high-salt diet [8.5 (4.3-10.2) h] than after a low-salt diet [10.0 (7.6-14.8) h] (P = 0.04). Conclusion: Dietary salt does not affect the relative oral bioavailability of quinine sulphate.Mahidol UniversityMedicinePharmacology, Toxicology and PharmaceuticsConference PaperSCOPUS10.1007/s002280100283