Shimizu T, Maeda S, Mochizuki H, et al. Theophylline attenuates circulating vitamin B
levels in children with asthma.
49: 392–397, 1994.
Martinez de Haas MG, Poels PJ, de Weert CJ, et al. Subnormal vitamin B
levels in theophylline users.
Ned Tijdschr Geneeskd
141: 2176–2179, 1997.
Ubbink JB, Delport R, Bissbort S, et al. Relationship between vitamin B
status and elevated pyridoxal kinase levels induced by theophylline therapy in humans.
120: 1352–1359, 1990.
Delport R, Ubbink JB, Vermaak WJ, and Becker PJ. Theophylline increases pyridoxal kinase activity independently from vitamin B
Res CommunChem Pathol Pharmacol
79: 325–333, 1993.
Bartel PR, Ubbink JB, Delport R, et al. Vitamin B
supplementation and theophylline-related effects in humans.
Am J Clin Nutr
60: 93–99, 1994.
Nebel A, Baker RK, and Kroll DJ. Potential metabolic interaction between theophylline and St. John's wort.
33(4): 502, 1999.
Jobst KA, McIntyre M, St. George D, et al. Safety of St. John's wort
355(9203): 575, 2000.
Bouraoui A, Toumi A, Mustapha HB, et al. Effects of capsicum fruit on theophylline absorption and bioavailability in rabbits.
Drug Nutr Interact
5: 345–350, 1998.
Monostory K and Vereczkey L. The effect of ipriflavone and its main metabolites on theophylline biotransformation.
Eur J Drug Metab Pharmacokinet
21(1): 61–66, 1996.
Please be aware that this information is provided to supplement the care provided by your physician. It is neither intended nor implied to be a substitute for professional medical advice. CALL YOUR HEALTHCARE PROVIDER IMMEDIATELY IF YOU THINK YOU MAY HAVE A MEDICAL EMERGENCY. Always seek the advice of your physician or other qualified health provider prior to starting any new treatment or with any questions you may have regarding a medical condition.