What are the 4 categories of drug actions?

What are the 4 categories of drug actions?

There are four types of ligand that act by binding to a cell surface receptor, agonists, antagonists, partial agonists, and inverse agonists (Figure 1).

What are the 4 phases of pharmacokinetics?

There are four main components of pharmacokinetics: liberation, absorption, distribution, metabolism and excretion (LADME). These are used to explain the various characteristics of different drugs in the body. They are covered in more detail below.

What are the types of drug action?

There are 2 different types of drugs: Agonists – they stimulate and activate the receptors….Potency

  • Agonists as having Intrinsic Activity = 1.
  • Antagonists as having Intrinsic Activity = 0.
  • and, Partial Agonist as having Intrinsic Activity between 0 and 1.

What are the 7 classifications of drugs?

7 Drug Categories

  • (1) Central Nervous System (CNS) Depressants. CNS depressants slow down the operations of the brain and the body.
  • (2) CNS Stimulants.
  • (3) Hallucinogens.
  • (4) Dissociative Anesthetics.
  • (5) Narcotic Analgesics.
  • (6) Inhalants.
  • (7) Cannabis.

What are the five mechanisms of drug action?

The mechanisms of action include inhibition of bacterial protein synthesis, inhibition of cell wall synthesis, inhibition of enzymatic activity, alteration of cell membrane permeability, and blockade of specific biochemical pathways.

What are the 3 phases of drug action?

Drug action usually occurs in three phases: Pharmaceutical phase. Pharmacokinetic phase. Pharmacodynamic phase.

What is duration of action of a drug?

The duration of action of a drug is known as its half life. This is the period of time required for the concentration or amount of drug in the body to be reduced by one-half. We usually consider the half life of a drug in relation to the amount of the drug in plasma.

What is meant by drug action?

Drug action refers to all the pharmacokinetic and pharmacodynamic processes involved in producing a drug effect on the disease.

What are the 8 drug categories?

The drug categories are:

  • Stimulants.
  • Inhalants.
  • Cannabinoids.
  • Depressants.
  • Opioids.
  • Steroids.
  • Hallucinogens.
  • Prescription drugs.

What are the 5 drug classifications?

The five classes of drugs are narcotics, depressants, stimulants, hallucinogens, and anabolic steroids.

What are the two most common modes of action for drugs?

Main modes of drug action

  • Replacing chemicals that are deficient.
  • Interfering with cell function.
  • Acting against invading organisms or abnormal cells.

What is the first phase of drug action?

The pharmaceutic phase (dissolution) is the first phase of drug action. In the gastrointestinal (GI) tract, drugs need to be in solution so they can be absorbed. A drug in solid form (tablet or capsule) must disintegrate into small particles to dissolve into a liquid, a process known as dissolution.

What are the three stages of drug action?

A tablet or capsule taken by mouth goes through three phases-pharmaceutic, pharmacokinetic, and pharmacodynamic-as drug actions occur. In the pharmaceutic phase, the drug becomes a solution so that it can cross the biologic membrane.

What are the three phases of drug effects?

The four main ways drugs get into our bloodstream are ingestion, inhalation, absorption, and injection. The three phases of drug effects are the administration phase, the active phase, and the metabolism phase.

What is the pharmacodynamic phase of drug action?

The last in the phases of drug actions is pharmacodynamics, which can be described as what the drug does to the body. This includes interactions with nutrients, food, and other drugs, any of which can also result in nutritional depletion. In the pharmacodynamics phase, medications can affect micronutrient status adjunct to their intended function.

What is pharmacokinetics phase of drug action?

Pharmacokinetics is the process of drug movement to achieve drug action . The four processes are absorption, distribution, metabolism (or biotransformation), and excretion (or elimination). The nurse applies knowledge of pharmacokinetics when assessing the patient for possible adverse drug effects.

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