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PURPOSE Drug resistance in brain tumors is partially mediated by the blood-brain barrier of which a key component is P-glycoprotein, which is highly expressed in cerebral capillaries. Tamoxifen is a nontoxic inhibitor of P-glycoprotein. This trial assessed, in primary and metastatic brain tumors, the differential deposition of paclitaxel and whether(More)
BACKGROUND Current literature suggests that the incidence of sexual dysfunction secondary to fluvoxamine therapy is 1% to 8%, while other selective serotonin reuptake inhibitors may have rates as high as 75%. The objective of this study was to determine the incidence of sexual dysfunction secondary to fluvoxamine in healthy volunteers. METHOD 20 healthy(More)
Gram-negative organisms have become increasingly resistant to both beta-lactam antibiotics and fluoroquinolones. Consequently, aminoglycoside antibiotics have undergone a resurgence in use. Because of the known toxicities of aminoglycoside antibiotics, clinicians have avoided their use, unless no other alternatives were extant. Over the past 2 decades, we(More)
PURPOSE This article reviews the effects of the increase in bacterial resistance on the treatment of ocular infections. DESIGN Interpretive assessment. METHODS Literature review and interpretation. RESULTS Ocular bacterial infections include conjunctivitis, keratitis, endophthalmitis, blepharitis, orbital cellulitis, and dacryocystitis. Treatment for(More)
Variable interindividual expression of cytochrome P450 3A presents a challenge in dosing drugs. The use of potent inhibitors of CYP3A such as ketoconazole has been explored to reduce the clearance of CYP3A substrates, thereby resulting in smaller dose requirements; however, the impact of CYP3A inhibition on interindividual variability has not been well(More)
Polymorphic expression of CYP2D6 contributes to the wide range of activity observed for this clinically important drug metabolizing enzyme. In this report we describe novel CYP2D7/2D6 hybrid genes encoding non-functional and functional CYP2D6 protein and a CYP2D7 variant that mimics a CYP2D7/2D6 hybrid gene. Five-kilobyte-long PCR products encompassing the(More)
The objective of this study was to evaluate the duration of oral pleconaril (a picornavirus inhibitor) effect on intestinal and hepatic cytochrome P450 (P450) 3A activity as assessed by oral midazolam. Healthy adults received oral midazolam (0.075 mg/kg) on days 1 (baseline), 7, 9, 13, 20, 27, and 34. Oral pleconaril (400 mg) three times daily for 15 doses(More)
Björkhem-Bergman et al. (2013) published a study in healthy adults evaluating endogenous 4b-hydroxycholesterol-to-cholesterol ratio to measure CYP3A induction. The authors compare CYP3A induction fold-changes and determined correlations between 4b-hydroxycholesterol-to-cholesterol ratio and midazolam clearance after rifampicin administration. Midazolam(More)
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