Basics Flashcards
(17 cards)
The effects of the drug on the body
Pharmacodynamics
The fraction of administered drug that reaches systemic circulation unchanged.
Bioavailability
The time required to change the amount of drug in the body by 1/2 during elimination.
Half life
Rate of elimination is constant.
Zero order elimination
Rate of elimination is directly proportional to the drug concentration.
First-order elimination
Drugs that undergo Zero order elimination
WHAT PET
Warfarin Heparin Aspirin Tolbutamide Phenytoin Ethanol Theophylline
The effects of the body on the drug
Pharmacokinetics
Phase 2 of Drug metabolism
Conjugation
Yields very polar, inactive metabolites
Phase 1 of drug metabolism
Convert parent drug to a more polar, or more reactive product.
HYDROLYSIS
OXIDATION
REDUCTION
DEAMINATION
“a HORDe of phase 1 reaction.”
aka Mixed Function Oxidases
Cytochrome P450 enzymes
Refers to the maximal effect a drug can produce.
EFFICACY
Drugs classes with High efficacy
Analgesics
Antibiotics
Antihistamines
Decongestants
Refers to the amount of drug needed for a given effect
POTENCY
Highly potent drug classes
Chemotherapeutics
Anti HPN
Lipid lowering drugs
Refers to measurement of drug safety
Therapeutic Index
A drug for a rare disease is called
Orphan drug
When giving Cholinomimetic agents, what are to watch out for?
Exacerbation of COPD, asthma, and peptic ulcers.