Pharmacology Flashcards

Which of the following antibiotics is most effective for treating Gram-positive bacterial infections?

Answer: Vancomycin

Vancomycin is a potent glycopeptide antibiotic primarily used for severe Gram-positive bacterial infections, especially those resistant to other antibiotics like Methicillin-resistant Staphylococcus aureus (MRSA). It works by inhibiting bacterial cell wall synthesis. The other options, Ciprofloxacin (broad-spectrum, but less specific for severe Gram-positive), Clindamycin (Gram-positive and anaerobes), and Metronidazole (anaerobes and protozoa), do not offer the same broad and potent coverage for severe Gram-positive infections as Vancomycin.

What is the primary mechanism of action of NSAIDs?

Answer: Inhibition of cyclooxygenase enzymes (COX)

NSAIDs (Nonsteroidal Anti-inflammatory Drugs) exert their therapeutic effects by inhibiting cyclooxygenase (COX) enzymes. These enzymes are crucial for the synthesis of prostaglandins, which are lipid compounds that mediate pain, inflammation, and fever. By blocking COX-1 and/or COX-2, NSAIDs reduce the production of these inflammatory mediators, thereby alleviating symptoms like pain and swelling.

Which drug class is commonly used for diabetic peripheral neuropathy in podiatry?

Answer: Anticonvulsants

Anticonvulsants, such as gabapentin and pregabalin, are a first-line pharmacological treatment for neuropathic pain, including diabetic peripheral neuropathy. They work by modulating neurotransmitter release and nerve excitability in the central nervous system, which helps to reduce the chronic burning, tingling, and shooting pain associated with nerve damage. This makes them effective in managing the specific type of pain experienced in diabetic peripheral neuropathy.

What is the antidote for heparin overdose?

Answer: Protamine sulfate

Protamine sulfate is the specific antidote used to reverse the anticoagulant effects of heparin. It works by forming a stable ion pair with heparin, effectively neutralizing its activity. This rapid reversal is critical in cases of heparin overdose leading to excessive bleeding or when emergency surgery is required for a patient on heparin therapy.

Which drug is a first-line treatment for acute gout attacks?

Answer: Colchicine

Colchicine is a first-line treatment for acute gout attacks due to its potent anti-inflammatory properties. It works by inhibiting neutrophil migration and activity, thereby reducing the inflammatory response to uric acid crystals in the joints. While allopurinol and febuxostat are used for long-term prevention of gout by reducing uric acid levels, colchicine specifically targets the acute inflammatory flare.