P450 Drug Interaction Table Quiz

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to Lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

Which substance is known to induce the enzyme 2A6?

  • St.John's Wort
  • Dexamethasone
  • Carbamazepine (correct)
  • Phenobarbital

Which drug is NOT an inducer of the enzyme 2D6?

  • Phenobarbital
  • Dexamethasone
  • Modafinil (correct)
  • Carbamazepine

Which of the following is categorized as an inducer for the enzyme 2C19?

  • Isoniazid
  • Enzalutamide (correct)
  • Ritonavir
  • Ethanol

Which food item is recognized as an inducer for the enzyme 1A2?

<p>Char-grilled meat (A)</p> Signup and view all the answers

Which of the following drugs is known to induce the enzyme 3A4?

<p>Rifampin (B)</p> Signup and view all the answers

Which substance is considered an inducer for the enzyme 2B6?

<p>Artemisinin (A)</p> Signup and view all the answers

Which of the following drugs induces the enzyme 2C9?

<p>Carbamazepine (D)</p> Signup and view all the answers

Which drug is commonly recognized as an inducer of the enzyme 2E1?

<p>Ethanol (B)</p> Signup and view all the answers

Which of the following is known to potentially affect the metabolism of drugs?

<p>Tobacco (D)</p> Signup and view all the answers

Which medication is listed as affecting the levels of phenytoin?

<p>Rifabutin (C)</p> Signup and view all the answers

What is one of the drugs that St. John's Wort interacts with?

<p>Phenobarbital (D)</p> Signup and view all the answers

Which drug is known to potentially decrease the efficacy of omeprazole?

<p>Rifampin (B)</p> Signup and view all the answers

Which medication might be influenced by the co-administration of pioglitazone?

<p>Simvastatin (B)</p> Signup and view all the answers

Which of the following is an acceptable inhibitor for in vitro experiments targeting 2B6?

<p>pantoprazole (A)</p> Signup and view all the answers

Which of the following inhibitors is classified under the 2E1 category?

<p>disulfiram (D)</p> Signup and view all the answers

Which of the following is not an acceptable inhibitor for 2C8?

<p>thrombolytics (C)</p> Signup and view all the answers

Which medication is preferred for inhibition of 1A2?

<p>fluvoxamine (B)</p> Signup and view all the answers

Which of the following options is listed as an HIV antiviral that also acts as an inhibitor?

<p>ritonavir (B)</p> Signup and view all the answers

Which of these medications is categorized under the 2D6 inhibitors?

<p>quinidine (A)</p> Signup and view all the answers

Which drug is not indicated as a preferred inhibitor for 3A4?

<p>duloxetine (A)</p> Signup and view all the answers

Which of the following is an acceptable inhibitor for in vitro experiments under the 2C19 category?

<p>paroxetine (C)</p> Signup and view all the answers

Which of the following is a substrate for enzyme 1A2?

<p>Dextromethorphan (D)</p> Signup and view all the answers

Which drug is a substrate for enzyme 2D6?

<p>Methadone (B), Quetiapine (D)</p> Signup and view all the answers

Which of the following medications is associated with enzyme 3A4?

<p>Sorafenib (C)</p> Signup and view all the answers

What is a characteristic of Dapsone?

<p>It is involved in demethylation. (C)</p> Signup and view all the answers

Which drug is not listed as a substrate for any of the enzymes mentioned?

<p>Salmeterol (D)</p> Signup and view all the answers

Which medication is related to enzyme 2C9?

<p>Nateglinide (A)</p> Signup and view all the answers

Which of the following drugs are substrates for enzyme 2C19?

<p>Quinine (A), Risperidone (C)</p> Signup and view all the answers

Which drug is associated with enzyme 2B6?

<p>Ondansetron (A)</p> Signup and view all the answers

Which of these drugs is not a substrate for enzyme 2E1?

<p>Sunitinib (D)</p> Signup and view all the answers

Which drug is indicated as a substrate for multiple enzymes including 3A4, 5, 7?

<p>Tamoxifen (B)</p> Signup and view all the answers

What are substrates in the context of cytochrome P450 enzymes?

<p>Drugs that are metabolized by the enzyme (C)</p> Signup and view all the answers

Which of the following is an example of an inhibitor in drug interactions?

<p>Omeprazole (A)</p> Signup and view all the answers

What is the role of activators in drug metabolism?

<p>To increase substrate metabolism (C)</p> Signup and view all the answers

Which enzyme is primarily associated with the metabolism of caffeine?

<p>1A2 (C)</p> Signup and view all the answers

Which of the following drugs is considered a substrate for the 2D6 enzyme?

<p>Tamoxifen (C)</p> Signup and view all the answers

Which drug is an example of a substrate for the 3A4 enzyme?

<p>Verapamil (A)</p> Signup and view all the answers

Which of the following best describes the relationship between inhibitors and substrates?

<p>Inhibitors block the metabolism of substrates (A)</p> Signup and view all the answers

Which substance is known to inhibit the enzyme 2D6?

<p>Paroxetine (C)</p> Signup and view all the answers

Which drug is an example of an activator for enzyme metabolism?

<p>Dexfenfluramine (A)</p> Signup and view all the answers

What is the consequence of using an enzyme inhibitor along with a substrate?

<p>Increased risk of substrate toxicity (C)</p> Signup and view all the answers

Which medication may cause a significant interaction by acting as a substrate for multiple P450 enzymes?

<p>Warfarin (D)</p> Signup and view all the answers

Which enzyme is noted for metabolizing paroxetine?

<p>2D6 (B)</p> Signup and view all the answers

Which of the following classes of drugs are generally affected by cytochrome P450 interactions?

<p>A wide range of drug classes (B)</p> Signup and view all the answers

What is the primary purpose of understanding P450 enzyme interactions in clinical prescribing?

<p>To manage potential drug interactions effectively (B)</p> Signup and view all the answers

Which of the following is a substrate of the enzyme 2D6?

<p>risperidone (D)</p> Signup and view all the answers

Which drug is a substrate for CYP enzyme 3A4?

<p>nitrendipine (B)</p> Signup and view all the answers

Which of the following is not a substrate for CYP2C9?

<p>ondansetron (B)</p> Signup and view all the answers

Which of the following substances is a known inhibitor of HMG CoA reductase?

<p>lovastatin (B)</p> Signup and view all the answers

Minaprine is classified under which enzyme substrate category?

<p>1A2 (D)</p> Signup and view all the answers

Which of the following drugs is associated with the 2B6 enzyme?

<p>sparteine (A)</p> Signup and view all the answers

Which drug affects steroid 6beta-OH activity?

<p>progesterone (B)</p> Signup and view all the answers

Which of these is known to inhibit CYP2C8?

<p>phenformin (B)</p> Signup and view all the answers

Which drug is listed among the miscellaneous substrates?

<p>codeine-N-methyl (D)</p> Signup and view all the answers

Flashcards

CYP3A4, 3A5, and 3A7

CYP3 A4, 3A5, and 3A7 are all enzymes that can metabolize drugs.

Demethylation

The process of removing a methyl group from a molecule.

Drug Metabolism

The process of breaking down drugs by enzymes in the body.

Flockhart Table

A table that lists common drug interactions based on the enzymes they affect.

Signup and view all the flashcards

CYP

A type of enzyme that plays a major role in drug metabolism.

Signup and view all the flashcards

Pharmacokinetics

The study of how drugs interact with the body.

Signup and view all the flashcards

Pharmacodynamics

The study of how drugs affect the body.

Signup and view all the flashcards

CYP3A4

An enzyme that can metabolize over 50% of all marketed drugs.

Signup and view all the flashcards

Substrate List

A list of drugs that are known to be metabolized by a specific enzyme.

Signup and view all the flashcards

Drug Interaction

The ability of a drug to interact with another drug, food, or substance.

Signup and view all the flashcards

CYP450 Enzymes

A group of related enzymes that metabolize various drugs.

Signup and view all the flashcards

CYP2C9

A specific CYP450 enzyme involved in the metabolism of drugs like warfarin, theophylline, and some anti-depressants.

Signup and view all the flashcards

CYP2C19

Another specific CYP450 enzyme involved in the metabolism of various drugs, such as celecoxib, phenytoin, and others.

Signup and view all the flashcards

CYP2D6

A specific CYP450 enzyme involved in the metabolism of various drugs, such as tamoxifen, dextromethorphan, and some anti-depressants.

Signup and view all the flashcards

The Flockhart Table

This table categorizes various medications according to the CYP450 enzymes that mainly metabolize them.

Signup and view all the flashcards

Drug-Drug Interaction

Medications that are broken down by the same CYP450 enzyme can compete for the same 'processing space'.

Signup and view all the flashcards

CYP450 Induction/Inhibition

A drug can increase or decrease the activity of specific CYP450 enzymes, affecting how other drugs are metabolized.

Signup and view all the flashcards

P450 enzyme Substrates

Drugs that are broken down by a specific cytochrome P450 enzyme.

Signup and view all the flashcards

P450 enzyme Inhibitors

Drugs that block a specific cytochrome P450 enzyme from functioning.

Signup and view all the flashcards

P450 enzyme Activators

Drugs that boost a specific cytochrome P450 enzyme's activity.

Signup and view all the flashcards

Cytochrome P450 Enzymes

The enzyme family responsible for metabolizing a large variety of drugs.

Signup and view all the flashcards

Amitriptyline (CYP1A2 substrate)

A drug known to be metabolized by the CYP1A2 enzyme.

Signup and view all the flashcards

Fluoxetine (CYP2D6 inhibitor)

A drug known to inhibit (block) the CYP2D6 enzyme.

Signup and view all the flashcards

Rifampin (CYP3A4 activator)

A drug known to activate (speed up) the CYP3A4 enzyme.

Signup and view all the flashcards

Predicting Drug Interactions using P450 enzymes

Knowing the dominant cytochrome P450 enzyme for a drug helps predict potential interactions based on the known inhibitors and activators for that enzyme.

Signup and view all the flashcards

Drug Metabolism Products

Drugs may be metabolized (broken down) into different products, with altered potency or even new effects.

Signup and view all the flashcards

Drug Metabolism: Reduced Effectiveness

Some drugs might have their effects reduced if their metabolic breakdown is faster (due to an activator drug).

Signup and view all the flashcards

Drug Metabolism: Increased Effectiveness

Some drugs might have their effects increased if their metabolic breakdown is slower (due to an inhibitor drug).

Signup and view all the flashcards

Importance of Drug Metabolism Information

Knowing the main metabolic pathway for a drug is crucial for safe and effective prescribing.

Signup and view all the flashcards

Complex Drug Interactions

Interactions between drugs can be influenced by the balance of enzyme inhibitors and activators present in the body.

Signup and view all the flashcards

Clinical Significance of Drug Interactions

The clinical significance of drug interactions may vary depending on the specific drugs involved and their individual effects.

Signup and view all the flashcards

What is the definition of a substrate list in the Flockhart Table?

A group of drugs that are metabolized by the same CYP enzyme. They can interact with each other since they compete for the same enzyme.

Signup and view all the flashcards

What is CYP3A4?

A specific enzyme involved in drug metabolism (breaking down drugs in the body). Different enzymes can metabolize different drugs.

Signup and view all the flashcards

What happens when two drugs are substrates of the same CYP enzyme?

This occurs when two medications use the same enzyme to be broken down. One drug may slow down the breakdown of the other.

Signup and view all the flashcards

How does the Flockhart Table help with drug interactions?

Knowing the drugs listed in the Flockhart Table and which CYP enzymes they interact with can help doctors manage potential drug interactions.

Signup and view all the flashcards

What is the Flockhart Table?

A comprehensive list of interactions between drugs, foods, and substances, based on the enzymes that affect them.

Signup and view all the flashcards

Cytochrome P450 (CYP) Enzymes

A group of enzymes in the liver that break down medications, potentially affecting their effectiveness or leading to drug interactions. They are numbered based on their genetic structure.

Signup and view all the flashcards

Enzyme inducers

Drugs that increase the activity of certain enzymes, leading to faster metabolism of other drugs. This can reduce the effectiveness of drugs or lead to lower than expected levels in the body.

Signup and view all the flashcards

CYP1A2 Enzyme

A specific CYP enzyme that metabolizes many drugs, including antidepressants like fluvoxamine and some anti-infectives. Inhibitors of CYP1A2 can cause drug accumulation and potential side effects.

Signup and view all the flashcards

1A2

This enzyme is involved in the metabolism of many drugs, including caffeine and some anti-cancer drugs.

Signup and view all the flashcards

2D6

This enzyme is responsible for breaking down a variety of drugs, including some antidepressants and anti-anxiety medications.

Signup and view all the flashcards

CYP2B6 Enzyme

A major CYP enzyme known to metabolize various drugs like clopidogrel (blood thinner), ticlopidine (blood thinner), and thiotepa (anticancer). Inhibitors can lead to increased blood thinning effects.

Signup and view all the flashcards

CYP2C Enzymes

A group of enzymes that play a role in metabolizing drugs, including statins (cholesterol-lowering) and some anti-infectives. Inhibiting CYP2C enzymes can lead to higher drug levels and potential side effects.

Signup and view all the flashcards

3A4,5,7

This enzyme is important for the metabolism of several drugs, such as some antibiotics and anti-inflammatory drugs.

Signup and view all the flashcards

Dietary Inducers of 1A2

Broccoli, brussel sprouts, char-grilled meat, and other foods containing these compounds can induce 1A2 activity.

Signup and view all the flashcards

CYP2C19 Enzyme

A CYP enzyme that metabolizes a broad range of drugs, including proton pump inhibitors (PPIs) used to treat heartburn and some antidepressants. Inhibition can lead to drug accumulation and side effects.

Signup and view all the flashcards

Drug Inducers of 2B6, 2C8, 2C9, 2C19, or 2D6

Carbamazepine, efavirenz, nevirapine, phenobarbital, phenytoin, rifampin, and other medications can increase the activity of 2B6, 2C8, 2C9, 2C19, or 2D6.

Signup and view all the flashcards

CYP2D6 Enzyme

A key CYP enzyme responsible for metabolizing many common drugs, including antidepressants, antipsychotics, and anti-infectives. Inhibiting CYP2D6 can lead to altered drug levels and possibly adverse effects.

Signup and view all the flashcards

CYP3A4, 5, 7 Enzymes

A CYP enzyme primarily involved in metabolizing drugs that are often used to treat pain and infections, such as opioids and antibiotics. Inhibition can lead to elevated drug levels and potential side effects.

Signup and view all the flashcards

Drug Inducers of 2E1, 3A4, 5, 7

Ethanol, HIV antivirals (efavirenz, nevirapine), isoniazid, glucocorticoids, barbiturates, and other medications can induce the activity of 2E1, 3A4, 5, 7.

Signup and view all the flashcards

Drug-Enzyme Interactions: A Summary

The interaction between drugs and enzymes can be complex, and it's important to consult with a healthcare provider to manage potential drug interactions.

Signup and view all the flashcards

Study Notes

Flockhart Table

  • The Flockhart Table is a tool to help understand drug interactions by looking at how drugs are metabolized.
  • Substrates are drugs metabolized by an enzyme.
  • Inhibitors prevent the enzyme from metabolizing substrates.
  • Activators increase the enzyme's ability to metabolize substrates.

P450 Drug Interaction Table

  • The table lists drugs categorized by the cytochrome P450 enzyme isoform they are substrates of.
  • It provides information about drug interactions based on substrate, inhibitor, and activator properties.
  • Drugs are listed by enzyme isoform (e.g., 1A2, 2B6, 2C8, 2C9, 2C19, 2D6, 2E1, 3A4, 5,7).
  • The table categorizes the listed drugs as substrates, inhibitors, or activators. For example, caffeine is a substrate for CYP1A2.
  • Examples of drug classes include antidepressants, antibiotics, anesthetics, anti-epileptics, etc.
  • The table indicates whether a drug is a strong, moderate, or weak inhibitor, and whether it is a preferred or acceptable inhibitor.

Studying That Suits You

Use AI to generate personalized quizzes and flashcards to suit your learning preferences.

Quiz Team

Related Documents

More Like This

Use Quizgecko on...
Browser
Browser