zithromax and Leukemia--Lymphocytic--Chronic--B-Cell

The evolving pandemic of Coronavirus Disease 2019 has posed a substantial health risk worldwide. However, there is a paucity of data regarding the clinical course and the therapeutic management of patients with chronic kidney disease and COVID-19 infection. To date, most evidence has come from renal transplantation, with about 45 patients reported thus far, and the current data from the ERA-EDTA (ERACODA) registry for transplanted patients and patients on Renal Replacement Therapy (RRT); as for those with glomerular diseases, data are lacking. Herein, we report the case of a 62-year-old patient with severe membranoproliferative glomerulonephritis who had been receiving a high burden of immunosuppression until four months before the COVID-19 infection. He developed severe disease with acute respiratory failure requiring mechanical ventilation. After treatment with hydroxychloroquine and azithromycin, despite his low chances, he gradually recovered and survived. To the best of our knowledge, this is one of the few reported patients with glomerulonephritis who had COVID-19 Besides our single case with glomerulonephritis early during the disease outbreak, the very low prevalence of COVID-19 infection in the country's transplant recipients (0.038%) and dialysis patients (0.24%) reflects the impact of the rapid implementation of social distancing rules as well as of preventive measures for disease control in the hospitals and dialysis units in our country.

Topics: Anti-Bacterial Agents; Azithromycin; Betacoronavirus; Ceftriaxone; Coronavirus Infections; COVID-19; Creatinine; Cryoglobulinemia; Cyclophosphamide; Enzyme Inhibitors; Glomerulonephritis, Membranoproliferative; Glucocorticoids; Greece; Humans; Hydroxychloroquine; Immunocompromised Host; Immunologic Factors; Kidney Failure, Chronic; Kidney Transplantation; Leukemia, Lymphocytic, Chronic, B-Cell; Lung; Male; Methylprednisolone; Middle Aged; Pandemics; Pneumonia, Viral; Renal Dialysis; Respiration, Artificial; Respiratory Insufficiency; Reverse Transcriptase Polymerase Chain Reaction; Rituximab; SARS-CoV-2; Tomography, X-Ray Computed

Venetoclax, a substrate of cytochrome P450 (CYP) 3A and P-glycoprotein (P-gp), is approved for the treatment of patients with chronic lymphocytic leukemia who have received at least one prior therapy. This study evaluated the effect of azithromycin, a commonly used antibiotic in cancer patients and a P-gp inhibitor, on the pharmacokinetics of venetoclax.. In this single-center, open-label, nonfasting, two-period study, 12 healthy female subjects received a single 100 mg dose of venetoclax on day 1 of period 1 and day 3 of period 2. Subjects received azithromycin 500 mg on day 1 and 250 mg once daily on days 2 through 5. Serial blood samples for the determination of venetoclax concentrations were collected after dosing in both periods. Safety was evaluated throughout the study.. Following coadministration of venetoclax with multiple doses of azithromycin, venetoclax maximum concentration and area under the curve to infinite time were 25% and 35% lower, respectively, compared to venetoclax administered alone. Venetoclax half-life and time to maximum concentration remained relatively unchanged when administered with azithromycin. Venetoclax was well tolerated with no serious adverse events reported.. The modest changes in venetoclax exposures when given with azithromycin indicate that no dose adjustment would be needed when venetoclax is coadministered with azithromycin or other drugs with P-gp inhibitory potential. Azithromycin represents an alternative to other antimicrobial agents with higher potential to alter venetoclax pharmacokinetics such as clarithromycin, erythromycin, and ciprofloxacin.. AbbVie in collaboration with Genentech/Roche.

Topics: Adult; Anti-Bacterial Agents; Antineoplastic Agents; Area Under Curve; ATP Binding Cassette Transporter, Subfamily B, Member 1; Azithromycin; Bridged Bicyclo Compounds, Heterocyclic; Cytochrome P-450 CYP3A; Dose-Response Relationship, Drug; Drug Interactions; Drug Monitoring; Female; Healthy Volunteers; Humans; Leukemia, Lymphocytic, Chronic, B-Cell; Sulfonamides

Babesiosis treatment failures with standard therapy have been reported, but the molecular mechanisms are not well understood. We describe the emergence of atovaquone and azithromycin resistance associated with mutations in the binding regions of the target proteins of both drugs during treatment of an immunosuppressed patient with relapsing babesiosis.

Topics: Aged, 80 and over; Amino Acid Sequence; Antiprotozoal Agents; Atovaquone; Azithromycin; Babesia microti; Babesiosis; Drug Resistance; Humans; Leukemia, Lymphocytic, Chronic, B-Cell; Male; Rituximab