A 72-year-old man presents to the emergency department with a 1 hour history of bruising and bleeding. He says that he fell and scraped his knee on the ground. Since then, he has been unable to stop the bleeding and has developed extensive bruising around the area. He has a history of gastroesophageal reflux disease, hypertension, and atrial fibrillation for which he is taking an oral medication. He says that he recently started taking omeprazole for reflux. Which of the following processes is most likely inhibited in this patient?
ASulfation
BOxidation
CFiltration
DAcetylation
EGlucuronidation
You are seeing a patient in clinic who recently started treatment for active tuberculosis. The patient is currently being treated with rifampin, isoniazid, pyrazinamide, and ethambutol. The patient is not used to taking medicines and is very concerned about side effects. Specifically regarding the carbohydrate polymerization inhibiting medication, which of the following is a known side effect?
AVision loss
BParesthesias of the hands and feet
CCutaneous flushing
DArthralgias
EElevated liver enzymes
A drug discovery team is conducting research to observe the characteristics of a novel drug under different experimental conditions. The drug is converted into the inactive metabolites by an action of an enzyme E. After multiple experiments, the team concludes that as compared to physiologic pH, the affinity of the enzyme E for the drug decreases markedly in acidic pH. Co-administration of an antioxidant A increases the value of Michaelis-Menten constant (Km) for the enzyme reaction, while co-administration of a drug B decreases the value of Km. Assume the metabolism of the novel drug follows Michaelis-Menten kinetics at the therapeutic dose, and that the effects of different factors on the metabolism of the drug are first-order linear. For which of the following conditions will the metabolism of the drug be the slowest?
AAcidic pH, co-administration of antioxidant A and of drug B
BAcidic pH, co-administration of antioxidant A, no administration of drug B
CPhysiologic pH, co-administration of antioxidant A, no administration of drug B
DAcidic pH, co-administration of drug B, no administration of antioxidant A
EAcidic pH, without administration of antioxidant A or drug B
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