What defines bioavailability (F), and what is the mathematical formula for calculating it from oral versus intravenous administration?

Bioavailability F is the fraction of a dose reaching systemic circulation unchanged: F = (AUCoral / Doseoral) / (AUCIV / DoseIV). IV administration has F = 1. To report a percentage, multiply F by 100; use the fraction, not the percentage, in loading- and maintenance-dose formulas.

How is apparent volume of distribution (Vd) calculated, and what does a large value imply?

Vd = amount of drug in the body / plasma drug concentration. A large apparent Vd means relatively little drug remains in plasma compared with the amount in the body, often because of tissue binding or partitioning. It is a proportionality constant, not a measured anatomical volume, and does not by itself prove lipophilicity.

What is the molecular target of beta-lactam antibiotics, and how do beta-lactamase inhibitors overcome bacterial enzymatic resistance?

Beta-lactam antibiotics bind penicillin-binding proteins and inhibit peptidoglycan cross-linking. Beta-lactamase inhibitors protect a partner antibiotic against susceptible enzymes, but their mechanisms and spectra differ. Clavulanate, sulbactam, and tazobactam are mechanism-based inhibitors; avibactam forms a reversible covalent complex with susceptible serine beta-lactamases. They do not overcome every resistance mechanism.

What is the mechanism of action of Vancomycin, and what is the pathophysiologic mechanism of 'Vancomycin Flushing Syndrome' (Red Man Syndrome)?

Vancomycin binds D-Ala-D-Ala termini of peptidoglycan precursors, inhibiting Gram-positive cell-wall synthesis. Vancomycin infusion reaction is usually rate-related, non-IgE-mediated histamine release. For the referenced IV product, infuse at no more than 10 mg/min and for at least 60 minutes, whichever requires longer. Stop and assess a suspected reaction; further management depends on severity and whether anaphylaxis is possible.

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Guia de estudo de Farmacologia: Domine os conceitos essenciais com Flashcards

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Pharmacology Flashcard Decks (3)

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Pharmacokinetics, Pharmacodynamics & Autonomic Nervous System Drugs

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1. Por que a Recordação Ativa e a Repetição Espaçada funcionam para Farmacologia

Dominar Farmacologia exige compreensão sólida e memorização precisa de conceitos, regras e aplicações práticas. Abaixo estão os conjuntos curados de Farmacologia no flashcards.world organizados por nível.

2. Conjuntos de Flashcards de Farmacologia no flashcards.world

3. Exemplos de Flashcards de Alto Rendimento (Farmacologia)

Nível	Frente (Pergunta / Termo)	Verso (Resposta / Explicação)
`basic`	What defines bioavailability (F), and what is the mathematical formula for calculating it from oral versus intravenous administration?	Bioavailability F is the fraction of a dose reaching systemic circulation unchanged: F = (AUC_oral / Dose_oral) / (AUC_IV / Dose_IV). IV administration has F = 1. To report a percentage, multiply F by 100; use the fraction, not the percentage, in loading- and maintenance-dose formulas.
`basic`	How is apparent volume of distribution (Vd) calculated, and what does a large value imply?	Vd = amount of drug in the body / plasma drug concentration. A large apparent Vd means relatively little drug remains in plasma compared with the amount in the body, often because of tissue binding or partitioning. It is a proportionality constant, not a measured anatomical volume, and does not by itself prove lipophilicity.
`intermediate`	What is the hemodynamic mechanism of ACE inhibitors in the renal glomerulus, and what causes the characteristic dry cough and angioedema?	ACE inhibitors (e.g., Lisinopril, Enalapril) block conversion of Angiotensin I to Angiotensin II, preferentially dilating the EFFERENT glomerular arteriole, which decreases intraglomerular capillary hydrostatic pressure and reduces proteinuria (protecting diabetic kidneys). ACE is identical to Kininase II; its inhibition prevents the degradation of Bradykinin and substance P, leading to dry cough and rare, life-threatening angioedema.
`intermediate`	How do Angiotensin Receptor Blockers (ARBs) differ pharmacologically from ACE inhibitors, and what is their clinical niche?	ARBs such as losartan and valsartan block angiotensin II AT1 receptors without inhibiting ACE (kininase II). They therefore do not inhibit bradykinin breakdown and cause less cough than ACE inhibitors. Angioedema is less common but can still occur, including in people with previous ACE-inhibitor-associated angioedema; it is not a zero-risk alternative.
`advanced`	What is the molecular target of beta-lactam antibiotics, and how do beta-lactamase inhibitors overcome bacterial enzymatic resistance?	Beta-lactam antibiotics bind penicillin-binding proteins and inhibit peptidoglycan cross-linking. Beta-lactamase inhibitors protect a partner antibiotic against susceptible enzymes, but their mechanisms and spectra differ. Clavulanate, sulbactam, and tazobactam are mechanism-based inhibitors; avibactam forms a reversible covalent complex with susceptible serine beta-lactamases. They do not overcome every resistance mechanism.
`advanced`	What is the mechanism of action of Vancomycin, and what is the pathophysiologic mechanism of 'Vancomycin Flushing Syndrome' (Red Man Syndrome)?	Vancomycin binds D-Ala-D-Ala termini of peptidoglycan precursors, inhibiting Gram-positive cell-wall synthesis. Vancomycin infusion reaction is usually rate-related, non-IgE-mediated histamine release. For the referenced IV product, infuse at no more than 10 mg/min and for at least 60 minutes, whichever requires longer. Stop and assess a suspected reaction; further management depends on severity and whether anaphylaxis is possible.

4. Cronograma de Estudo de 8 Semanas

Semanas 1–2: Base (basic): Conclua os conjuntos Básicos (32 novos cartões/dia) e revise diariamente por 15–20 minutos.
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Semanas 6–7: Domínio (advanced): Avance para os conjuntos Avançados (15 novos cartões/dia) misturando tópicos para provas e concursos.
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Ignorar os exemplos: Leia o contexto completo no verso de cada cartão.

6. Perguntas Frequentes (FAQ)

Quantos flashcards de Farmacologia devo estudar por dia?

Comece com 20 a 32 novos cartões por dia (1 conjunto) mais as revisões diárias.

Por qual nível começar no flashcards.world?

Inicie pelo nível Básico e avance para o Intermediário ao atingir 85% de acerto.

Explorar todos os conjuntos de Farmacologia no flashcards.world →