Food–Drug Interaction between the Adlay Bran Oil and Drugs in Rats

Adlay (Coix lachryma-jobi L. var. ma-yuen Stapf) contains various phytonutrients for treating many diseases in Asia. To investigate whether orally administered adlay bran oil (ABO) can cause drug interactions, the effects of ABO on the pharmacokinetics of five cytochrome P450 (CYP) probe drugs were evaluated. Rats were given a single oral dose (2.5 mL/kg BW) of ABO 1 h before administration of a drug cocktail either orally or intravenously, and blood was collected at various time points. A single oral dose of ABO administration did not affect the pharmacokinetics of five probe drugs when given as a drug cocktail intravenously. However, ABO increased plasma theophylline (+28.4%), dextromethorphan (+48.7%), and diltiazem (+46.7%) when co-administered an oral drug cocktail. After 7 days of feeding with an ABO-containing diet, plasma concentrations of theophylline (+45.4%) and chlorzoxazone (+53.6%) were increased after the oral administration of the drug cocktail. The major CYP enzyme activities in the liver and intestinal tract were not affected by ABO treatment. Results from this study indicate that a single oral dose or short-term administration of ABO may increase plasma drug concentrations when ABO is given concomitantly with drugs. ABO is likely to enhance intestinal drug absorption. Therefore, caution is needed to avoid food–drug interactions between ABO and co-administered drugs.

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Prophylaxis of Plasmodium falciparumInfection in a Human Challenge Model with WR 238605, a New 8-Aminoquinoline Antimalarial

Antimicrobial Agents and Chemotherapy ◽

10.1128/aac.42.5.1293 ◽

1998 ◽

Vol 42 (5) ◽

pp. 1293-1294 ◽

Cited By ~ 60

Author(s):

Ralf P. Brueckner ◽

Trinka Coster ◽

David L. Wesche ◽

Moshe Shmuklarsky ◽

Brian G. Schuster

Keyword(s):

Plasmodium Falciparum ◽

Oral Dose ◽

Single Oral Dose ◽

Prophylactic Efficacy ◽

Drug Concentrations ◽

Prophylactic Drug

ABSTRACT The prophylactic efficacy of WR 238605, a primaquine analog, was studied with a human Plasmodium falciparum challenge model. A single oral dose of 600 mg, administered 1 day prior to challenge, successfully protected three of four subjects. The fourth subject developed mild, oligosymptomatic malaria on day 31, with drug concentrations one-half of those in the protected individuals. WR 238605 appears to be a promising prophylactic drug for P. falciparum malaria.

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Parenteral corticosteroids in emergency

Drug and Therapeutics Bulletin ◽

10.1136/dtb.5.2.6 ◽

1967 ◽

Vol 5 (2) ◽

pp. 6-7

Keyword(s):

Oral Dose ◽

Single Oral Dose ◽

Corticosteroid Therapy ◽

Plasma Concentrations ◽

Addison’S Disease ◽

Sudden Increase ◽

Adrenal Failure ◽

Intravenous Therapy ◽

Intramuscular Dose ◽

Acute Adrenal Failure

Corticosteroids are well absorbed from the gut: plasma concentrations of prednisolone or hydrocortisone are at a maximum about 2 hours after a single oral dose.1 An intramuscular dose acts no more quickly. Intravenous corticosteroid acts at once and is required for severe acute adrenal failure, for example in the crises of Addison’s disease, after adrenalectomy, after sudden cessation of corticosteroid therapy and sometimes in severe hypopituitarism. A sudden increase in the requirement of patients who are taking or have taken corticosteroids may also demand intravenous therapy.

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Effect of Short-Course Oral Ciprofloxacin on Isoflavone Pharmacokinetics following Soy Milk Ingestion in Healthy Postmenopausal Women

Evidence-based Complementary and Alternative Medicine ◽

10.1155/2019/7192326 ◽

2019 ◽

Vol 2019 ◽

pp. 1-10

Author(s):

Nathathai Temyingyong ◽

Nut Koonrungsesomboon ◽

Nutthiya Hanprasertpong ◽

Mingkwan Na Takuathung ◽

Supanimit Teekachunhatean

Keyword(s):

Oral Dose ◽

Gut Microbiota ◽

Single Oral Dose ◽

Postmenopausal Women ◽

Plasma Concentrations ◽

Soy Milk ◽

Blood Samples ◽

Short Course ◽

Oral Ciprofloxacin ◽

Milk Ingestion

Soy isoflavones have several potential benefits related to postmenopausal health. Isoflavone glycosides, found predominantly in nonfermented soy products, e.g., soy milk, require conversion by gut microbiota to their respective bioavailable aglycones prior to absorption into portal circulation. Use of short-course oral ciprofloxacin for the treatment of acute uncomplicated cystitis, the incidence of which is increasing among postmenopausal women, might adversely affect gut microbiota. The objective of this one-group pre-post treatment study was to determine the effect of short-course oral ciprofloxacin on isoflavone pharmacokinetics in healthy postmenopausal women. Eleven postmenopausal subjects were assigned to consume a single oral dose of 375 mL UHT soy milk (SOY phase). Blood samples were collected immediately before soy milk ingestion and at specific times for 32 hours after soy milk ingestion. Following a washout period of at least seven days, subjects were assigned to take 250 mg oral ciprofloxacin after breakfast and dinner for three days, followed by a single oral dose of 375 mL UHT soy milk the next day (CIPRO/SOY phase). Blood samples were collected at the same time points as in the SOY phase. Plasma samples were treated withβ-glucuronidase/sulfatase and plasma concentrations of aglycones (genistein and daidzein) were determined using high-performance liquid chromatography.Cmax,AUC0-t, andAUC0-∞of both aglycones andTmaxof genistein obtained from the CIPRO/SOY phase were significantly lower than those obtained from the SOY phase, whileTmaxof daidzein and t1/2of both aglycones in the two phases were not significantly different.

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PLASMA CONCENTRATIONS, URINARY EXCRETION AND BACTERICIDAL ACTIVITY OF CIPROFLOXACIN XR (1000 MG) VERSUS LEVOFLOXACIN (500 MG) IN HEALTHY VOLUNTEERS RECEIVING A SINGLE ORAL DOSE

European Urology Supplements ◽

10.1016/s1569-9056(06)60495-8 ◽

2006 ◽

Vol 5 (2) ◽

pp. 145

Author(s):

F. Wagenlehner ◽

M. Kinzig-schippers ◽

U. Tischmeyer ◽

C. Wagenlehner ◽

F. Sörgel ◽

...

Keyword(s):

Oral Dose ◽

Urinary Excretion ◽

Healthy Volunteers ◽

Single Oral Dose ◽

Bactericidal Activity ◽

Plasma Concentrations

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Effects of Ginkgo biloba Extract Ingestion on the Pharmacokinetics of Talinolol in Healthy Chinese Volunteers

Annals of Pharmacotherapy ◽

10.1345/aph.1l656 ◽

2009 ◽

Vol 43 (5) ◽

pp. 944-949 ◽

Cited By ~ 41

Author(s):

Lan Fan ◽

Gong-You Tao ◽

Guo Wang ◽

Yao Chen ◽

Wei Zhang ◽

...

Keyword(s):

Oral Dose ◽

Single Oral Dose ◽

Ginkgo Biloba ◽

High Performance ◽

Plasma Concentrations ◽

Ginkgo Biloba Extract ◽

Maximum Plasma ◽

Time Curve ◽

P Glycoprotein

Background Ginkgo biloba extract (GBE), the best selling herbal medicine in the world, has been reported to inhibit P-glycoprotein in vitro. However, the effects of GBE on P-glycoprotein activity in humans have not been clarified. Objective To investigate the effects of single and repeated GBE ingestion on the oral pharmacokinetics of talinolol, a substrate drug for P-glycoprotein in humans. Methods Ten unrelated healthy male volunteers were selected to participate in a 3-stage sequential study. Plasma concentrations of talinolol from 0 to 24 hours were measured by high-performance liquid chromatography after talinolol 100 mg was administrated alone, with a single oral dose of GBE (120 mg), and after 14 days of repeated GBE ingestion (360 mg/day). Results A single oral dose of GBE did not affect the pharmacokinetics of talinolol. Repeated ingestion of GBE increased the talinolol maximum plasma concentration (Cmax) by 36% (90% CI 10 to 68; p = 0.025), the area under the concentration-time curve (AUC)0-24 by 26% (90% CI 11 to 43; p = 0.008) and AUC0-∞ by 22% (90% CI 8 to 37; p = 0.014), respectively, without significant changes in elimination half-life and the time to Cmax. Conclusions Our results suggest that long-term use of GBE significantly influenced talinolol disposition in humans, likely by affecting the activity of P-glycoprotein and/or other drug transporters.

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Chemical ionisation mass fragmentographic measurement of dothiepin plasma concentrations following a single oral dose in man

Journal of Chromatography B Biomedical Sciences and Applications ◽

10.1016/s0378-4347(00)81687-4 ◽

1980 ◽

Vol 183 (2) ◽

pp. 141-148 ◽

Cited By ~ 13

Author(s):

E.L. Crampton ◽

R.C. Glass ◽

B. Marchant ◽

J.A. Rees

Keyword(s):

Oral Dose ◽

Single Oral Dose ◽

Plasma Concentrations ◽

Chemical Ionisation ◽

Ionisation Mass

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Probenecid inhibits SARS-CoV-2 replication in vivo and in vitro

Scientific Reports ◽

10.1038/s41598-021-97658-w ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Jackelyn Murray ◽

Robert J. Hogan ◽

David E. Martin ◽

Kathy Blahunka ◽

Fred D. Sancilio ◽

...

Keyword(s):

Oral Dose ◽

Single Oral Dose ◽

Virus Replication ◽

Mammalian Cells ◽

Clinical Utility ◽

Plasma Concentrations ◽

Hamster Model ◽

Potential Clinical Utility

AbstractEffective vaccines are slowing the COVID-19 pandemic, but SARS-CoV-2 will likely remain an issue in the future making it important to have therapeutics to treat patients. There are few options for treating patients with COVID-19. We show probenecid potently blocks SARS-CoV-2 replication in mammalian cells and virus replication in a hamster model. Furthermore, we demonstrate that plasma concentrations up to 50-fold higher than the protein binding adjusted IC90 value are achievable for 24 h following a single oral dose. These data support the potential clinical utility of probenecid to control SARS-CoV-2 infection in humans.

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