Pharmacology for Technicians Flashcards
6 cards from real PTCB practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Pharmacology for Technicians flashcards as text
Which drug interaction occurs between warfarin and vitamin K?
Answer: Antagonistic — vitamin K reduces warfarin's effectiveness
Vitamin K antagonizes warfarin by providing the substrate warfarin works to deplete, reducing anticoagulant effect and lowering INR.
What is the term for the time it takes for a drug's plasma concentration to decrease by 50%?
Answer: Half-life
The half-life (t½) is the time required for the drug concentration in the plasma to decrease by half, determining dosing intervals.
Which of the following is a potential side effect of long-term corticosteroid use?
Answer: Osteoporosis
Long-term corticosteroid use can cause osteoporosis by inhibiting osteoblast activity and increasing calcium excretion.
Insulin glargine is classified as which type of insulin?
Answer: Long-acting (basal)
Insulin glargine (Lantus, Basaglar) is a long-acting basal insulin with a duration of approximately 24 hours.
Which drug class can cause photosensitivity as a side effect?
Answer: Tetracycline antibiotics
Tetracycline antibiotics (e.g., doxycycline) frequently cause photosensitivity, increasing the risk of sunburn.
What is the mechanism of action of benzodiazepines?
Answer: Enhance GABA activity in the CNS
Benzodiazepines enhance the effect of GABA (gamma-aminobutyric acid) at GABA-A receptors, producing sedation and anxiolysis.