Drug Interaction between Rifampicin and Cotrimoxazole in Patients with Tuberculosis

1991 ◽  
Vol 10 (6) ◽  
pp. 419-421 ◽  
Author(s):  
R.S. Bhatia ◽  
R. Uppal ◽  
R. Malhi ◽  
D. Behera ◽  
S.K. Jindal
Keyword(s):  
Drug Interaction ◽  
Half Life ◽  
Serum Levels ◽  
Antitubercular Therapy ◽  
The Mean ◽  
Plasma Half Life

1 Patients ( n = 15) who were admitted with complications of tuberculosis, were given antitubercular therapy (ATT) with rifampicin (RIF), for a minumum period of 15 d, and cotrimoxazole (CTZ), concurrently, for 5-10 d. 2 The serum RIF levels were measured before the start of CTZ treatment and at the end of its administration. 3 The plasma half-life ( t½) of RIF increased significantly from 1.92 ± 0.57 h to 2.31 ± 0.134 h after CTZ treatment. 4 The mean serum levels of RIF increased significantly at 4 and 6 h after CTZ administration.

Cephazolin Treatment of Pneumococcal Pneumonia and Urinary Tract Infections

1975 ◽  
Vol 20 (5) ◽  
pp. 248-254 ◽  
Author(s):  
M. Kilpatrick ◽  
T. C. Cesario ◽  
L. Thrupp ◽  
J. G. Tilles
Keyword(s):  
Renal Function ◽  
Half Life ◽  
Pneumococcal Pneumonia ◽  
Peak Level ◽  
Serum Levels ◽  
Peak Serum Level ◽  
E Coli ◽  
Serial Serum ◽  
The Mean ◽  
Tract Infections

Ten cases of pneumococcal pneumonia were treated with cephazolin 500 mg. q8h for at least 5 days. In every case therapy was accompanied by clinical improvement and eradication of the organism. Ten patients with E. coli bacteriuria (5 symptomatic) were treated with cephazolin 500 mg. q12h for 7 to 10 days. In every case the pathogen was eliminated during therapy but in one case bacteriologic relapse occurred following cessation of therapy. In 10 cases of bacteriuria caused by P. mirabilis, Klebsiella sp, Enterobacter, and Enterococcus, the urine became sterile during treatment, but relapse was common. Initial and final creatinine clearances obtained in 29 patients who received an average of 12.9 g. of cephazolin showed no tendency toward loss of renal function. Serial serum levels of cephazolin were determined following the first 500 mg. dose in 18 patients. The peak serum level occurred at one hour with a serum half life of approximately 2.2 hours. For 13 of these 18 patients serial serum levels were also obtained following the last dose of cephazolin. At this time the mean peak level occurred at 2 hours but again the serum half life was approximately 1.9 hours.

The Serum Half-Life and Urine Concentrations of Cephazolin Sodium in Patients with Terminal Renal Failure: Effect of Haemodialysis

1975 ◽  
Vol 20 (5) ◽  
pp. 240-243 ◽  
Author(s):  
J. B. Eastwood ◽  
P. E. Gower ◽  
J. R. Curtis
Keyword(s):  
Renal Failure ◽  
Half Life ◽  
Dosage Schedule ◽  
Dialysis Patients ◽  
Maintenance Haemodialysis ◽  
Terminal Renal Failure ◽  
Percentage Recovery ◽  
Urine Concentrations ◽  
The Mean ◽  
Plasma Half Life

The serum and plasma half-life of cephazolin has been determined in 5 maintenance haemodialysis patients during a non-dialysis period and then again in the same patients during haemodialysis with a Meltec Maxi-Multipoint dialyser using cuprophane membranes. The mean half-life during the non-dialysis period was 28.3 hours and fell to a mean of 4.97 hours during haemodialysis. Percentage recovery of cephazolin in the urine was markedly reduced in 4 maintenance dialysis patients although adequate urine concentrations of cephazolin were achieved for many sensitive organisms. A dosage schedule for patients with creatinine clearances of less than 5 ml. per minute and for maintenance haemodialysis patients is suggested.

The Effect of Brassica Vegetable Consumption on Caffeine Metabolism in Humans

1992 ◽  
Vol 11 (3) ◽  
pp. 167-172 ◽  
Author(s):  
R.E. McDanell ◽  
L.A. Henderson ◽  
K. Russell ◽  
A.E.M. McLean
Keyword(s):  
Healthy Volunteers ◽  
Half Life ◽  
Vegetable Consumption ◽  
Interindividual Variation ◽  
Short Term ◽  
Brassica Vegetables ◽  
The Mean ◽  
Caffeine Metabolism ◽  
Brassica Vegetable ◽  
Plasma Half Life

Ten healthy volunteers were used in two studies investigating the effect of short-term Brassica consumption on caffeine metabolism. In the first study volunteers were given three Brassica-containing meals, the last one 3 h prior to caffeine administration. In the second study volunteers were given two Brassica-containing meals and then fasted overnight before caffeine administration. In both studies the mean plasma half-life of caffeine was reduced by approximately 20% following a Brassica diet, suggesting that Brassica vegetables stimulate caffeine metabolism. When caffeine was given 3 h after the last meal, plasma caffeine concentrations over 6 h, were increased by up to 27% on the Brassica diet compared to controls. This may be due to a transient increased permeability of the intestine to caffeine, immediately following Brassica consumption. This effect was not seen in the second study where there was a 12-h period between the last meal and caffeine administration. There was large interindividual variation in the effect of the Brassica diet on caffeine metabolism.

ROLE OF THE KIDNEY IN THE METABOLISM OF LUTEINIZING HORMONE

1973 ◽  
Vol 58 (3) ◽  
pp. 425-434 ◽  
Author(s):  
D. M. de KRETSER ◽  
R. C. ATKINS ◽  
C. A. PAULSEN
Keyword(s):  
Luteinizing Hormone ◽  
Half Life ◽  
Renal Excretion ◽  
Gel Filtration ◽  
Deae Cellulose ◽  
Proximal Convoluted Tubule ◽  
Bilateral Oophorectomy ◽  
The Mean ◽  
Plasma Half Life

SUMMARY Autoradiographic localization of 125I-labelled luteinizing hormone (LH) in the renal proximal convoluted tubule of rats initiated a study of the role of the kidney in the metabolism of LH. Incubation of 131I-labelled LH with rat renal homogenates for 90 min failed to destroy its immunological reactivity. The plasma half-life of 131I-labelled LH injected i.v. was investigated in normal ewes and rams. Preliminary studies indicated that the use of a preparation containing a high proportion of 'damaged' iodinated hormone could erroneously prolong the plasma half-life. Before use, 131I-labelled LH was purified by gel filtration and column chromatography using DEAE-cellulose. The mean plasma half-life of 131I-labelled LH in normal ewes was 26·7 min and was not significantly altered after oophorectomy (31·1 min). After bilateral oophorectomy and nephrectomy, marked prolongation of the plasma half-life was observed (mean 70·7 min). In normal rams, mean plasma half-life of 131I-labelled LH was 32·0 min, after orchidectomy 44·0 min and after orchidectomy and nephrectomy 82·0 min. The plasma half-life of 131I-labelled LH in a nephrectomized ewe maintained on haemodialysis was also prolonged (67·5 min), the determination being performed 24 h after the last haemodialysis. Although the kidney does not degrade LH, the plasma half-life was significantly increased after nephrectomy. This suggests that the localization of 125I-labelled LH in the proximal convoluted tubule may represent a secretory mechanism allowing renal excretion of LH.

scholarly journals Influence of maturation and growth on cefetamet pivoxil pharmacokinetics: rational dosing for infants.

1996 ◽  
Vol 40 (3) ◽  
pp. 567-574 ◽  
Author(s):  
W L Hayton ◽  
J Kneer ◽  
R de Groot ◽  
K Stoeckel
Keyword(s):  
Body Weight ◽  
Half Life ◽  
Pediatric Patients ◽  
Volume Of Distribution ◽  
Systemic Clearance ◽  
Older Children ◽  
Dosing Regimen ◽  
Urinary Recovery ◽  
The Mean ◽  
Plasma Half Life

The pharmacokinetics of intravenous (i.v.) cefetamet and the bioavailability of oral cefetamet pivoxil in infants aged 3.5 to 17.3 months who were hospitalized for urological surgery were characterized. The absorption of cefetamet pivoxil administered in a syrup formulation was 38 +/- 19% (n = 5) for infants, which was comparable to values observed for children and adults. The plasma half-life of i.v. cefetamet was 3.03 +/- 0.96 h (mean +/- standard deviation; n = 20) in the infants. This was not different from the value observed for normal adult subjects but was longer than that reported for children aged 3 to 12 years. Urinary recovery of cefetamet after i.v. administration to infants was 63.4 +/- 17.7% (n = 16), which was less than the 80% recovery found in older children and adults. The steady-state volume of distribution was 399 +/- 116 ml/kg of body weight. It was comparable in size and showed the same dependence on body weight as it did in children and adults. The mean systemic clearance per kilogram of body weight in the infants was lower than that in children and adults, apparently because of immaturity of clearance processes. A model that accounted for maturation and growth with increasing age was developed for the clearance. On the basis of this model, the clearance capacity increased from birth to 5 years by a factor of 4.5 because of maturation. Maturation progressed exponentially, with a half-life of 14 months. This model was used to develop dosing regimen guidelines for pediatric patients aged 3.5 months and older.

Increased Antipyrine Half-Life in Women Taking Oral Contraceptives

1970 ◽  
Vol 15 (12) ◽  
pp. 454-456 ◽  
Author(s):  
K. O'Malley ◽  
I. H. Stevenson ◽  
Wilma Alexander
Keyword(s):  
Oral Contraceptive ◽  
Oral Contraceptives ◽  
Half Life ◽  
Control Value ◽  
Control Subjects ◽  
The Mean ◽  
Plasma Half Life

The plasma half-life of antipyrine has been measured in 18 women taking oral contraceptives and in 19 control subjects. The mean half-life in the oral contraceptive group of 13.2±2.0 hr. was significantly prolonged compared to the control value of 10.5±2.5 hours

Plasma Thrombospondin as an Indicator of Intravascular Platelet Activation in Patients with Vasculitis

1987 ◽  
Vol 58 (03) ◽  
pp. 850-852 ◽  
Author(s):  
M B McCrohan ◽  
S W Huang ◽  
J W Sleasman ◽  
P A Klein ◽  
K J Kao
Keyword(s):  
Platelet Activation ◽  
Plasma Levels ◽  
Half Life ◽  
Degradation Products ◽  
Plasma Concentrations ◽  
Primary Source ◽  
Positive Correlation ◽  
Activation Marker ◽  
Fibrin Degradation Products ◽  
The Mean

SummaryThe use of plasma thrombospondin (TSP) concentration was investigated as an indicator of intravascular platelet activation. Patients (n = 20) with diseases that have known vasculitis were included in the study. The range and the mean of plasma TSP concentrations of patients with vasculitis were 117 ng/ml to 6500 ng/ml and 791±1412 ng/ml (mean ± SD); the range and the mean of plasma TSP concentrations of control individuals (n = 33) were 13 ng/ml to 137 ng/ml and 59±29 ng/ml. When plasma TSP concentrations were correlated with plasma concentrations of another platelet activation marker, β-thromboglobulin (P-TG), it was found that the TSP concentration inei eased exponentially as the plasma β-TG level rose. A positive correlation between plasma levels of plasma TSP and serum fibrin degradation products was also observed. The results suggest that platelets are the primary source of plasma TSP in patients with various vasculitis and that plasma TSP can be a better indicator than β-TG to assess intravascular platelet activation due to its longer circulation half life.

Covalent Complexes Between Low Molecular Weight Heparin Fragments and Antithrombin III – Inhibition Kinetics and Turnover Parameters

1983 ◽  
Vol 49 (02) ◽  
pp. 109-115 ◽  
Author(s):  
M Hoylaerts ◽  
E Holmer ◽  
M de Mol ◽  
D Collen
Keyword(s):  
Molecular Weight ◽  
Half Life ◽  
Low Molecular Weight Heparin ◽  
Antithrombin Iii ◽  
Factor Xa ◽  
Life Time ◽  
Low Molecular Weight ◽  
High Affinity ◽  
Plasma Half Life ◽  
Covalent Complex

SummaryTwo high affinity heparin fragments (A/r 4,300 and M, 3,200) were covalently coupled to antithrombin III (J. Biol. Chem. 1982; 257: 3401-3408) with an apparent 1:1 stoichiometry and a 30-35% yield.The purified covalent complexes inhibited factor Xa with second order rate constants very similar to those obtained for antithrombin III saturated with these heparin fragments and to that obtained for the covalent complex between antithrombin III and native high affinity heparin.The disappearance rates from plasma in rabbits of both low molecular weight heparin fragments and their complexes could adequately be represented by two-compartment mammillary models. The plasma half-life (t'/j) of both low Afr-heparin fragments was approximately 2.4 hr. Covalent coupling of the fragments to antithrombin III increased this half-life about 3.5 fold (t1/2 ≃ 7.7 hr), approaching that of free antithrombin III (t1/2 ≃ 11 ± 0.4 hr) and resulting in a 30fold longer life time of factor Xa inhibitory activity in plasma as compared to that of free intact heparin (t1/2 ≃ 0.25 ± 0.04 hr).

Does HbA1cc Play a Role in the Development of Cardiovascular Diseases?

2018 ◽  
Vol 24 (24) ◽  
pp. 2876-2882 ◽  
Author(s):  
Kailash Prasad
Keyword(s):  
Risk Factors ◽  
Cardiovascular Diseases ◽  
Cardiovascular System ◽  
Half Life ◽  
Serum Levels ◽  
Serum Glucose ◽  
Cvd Risk ◽  
Factors Affecting ◽  
Diagnosis And Management ◽  
Coronary Artery Atherosclerosis

Cardiovascular diseases (CVD) may be mediated through increases in the cardiovascular risk factors. Hemoglobin A1c (HbA1c) also called glycated hemoglobin is presently used for the diagnosis and management of diabetes. It has adverse effects on cardiovascular system. This review deals with its synthesis and effects on the cardiovascular system. The serum levels of HbA1c have been reported to be affected by various factors including, the lifespan of erythrocytes, factors affecting erythropoiesis, agents interfering glycation of Hb, destruction of erythrocytes, drugs that shift the formation of Hb, statins, and drugs interfering the HbA1c assay. Levels of HbA1c are positively correlated with serum glucose and advanced glycation end products ( AGE), but no correlation between AGE and serum glucose. AGE cannot replace HbA1c for the diagnosis and management of diabetes because there is no correlation of AGE with serum glucose, and because the half-life of protein with which glucose combines is only 14-20 days as compared to erythrocytes which have a half-life of 90-120 days. HbA1c is positively associated with CVD such as the carotid and coronary artery atherosclerosis, ischemic heart disease, ischemic stroke and hypertension.HbA1c induces dyslipidemia, hyperhomocysteinemia, and hypertension, and increases C-reactive protein, oxidative stress and blood viscosity that would contribute to the development of cardiovascular diseases. In conclusion, HbA1c serves as a useful marker for the diagnosis and management of diabetes. AGE cannot replace HbA1c in the diagnosis and management of diabetes. There is an association of HbA1c with CVD which be mediated through modulation of CVD risk factors.

scholarly journals Evaluation of Serum Immunoglobulins (IgG, IgA, IgM) and Circulating Immune Complexes in Oral Precancer and Cancer Patients

2021 ◽  
Author(s):  
Pooja Madki ◽  
Mandya Lakshman Avinash Tejasvi ◽  
Geetha Paramkusam ◽  
Ruheena Khan ◽  
Shilpa J.
Keyword(s):  
Oral Cancer ◽  
Immune Complexes ◽  
Serum Levels ◽  
Circulating Immune Complexes ◽  
Oral Cancers ◽  
Cancer Group ◽  
Oral Precancer ◽  
Serum Iga ◽  
The Mean

Abstract Objectives The aim of the present study is to evaluate the role of immunoglobulins (IgA, IgG, and IgM) and circulating immune complexes (CIC) as tumor marker in oral cancer and precancer patients. Materials and Methods The present study was performed on 45 individuals subdivided into three groups, that is, oral precancer, oral cancer and healthy individuals, and levels of immunoglobulins, and CIC was estimated by turbidometry and ELISA method. Results In the present study, the mean serum IgA levels in oral precancer were 161.00 ( ±  118.02) mg/dL, oral cancers were 270.67 ( ±  171.44) mg/dL, and controls were 133.73 ( ±  101.31) mg/dL. Mean serum levels of IgG in oral precancer were 1,430.87 ( ±  316) mg/dL, oral cancers were 1,234.27 ( ±  365.42) mg/dL, and controls were 593.87 ( ±  323.06) mg/dL. Conclusion We found that the levels of serum IgG and IgA were elevated consistently in precancer and cancer group, and Serum IgM levels were increased only in precancer. Also, significant increase in serum CIC levels were seen in oral precancer and cancer group on comparison with control.

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