Intro to Pharmacology Flashcards
Grapefruit juice medication interaction that slows metabolism and causes toxicity
Sertraline
Fexofenadine
Nifedipine
Factors that influence the absorption, distribution, metabolism, and excretion of medications
1.the route of administration,
2. the presence of acute or chronic medical conditions
3. physiologic changes that occur with aging
4. medication-medication or medication-food interactions.
medication indication
a medications intended therapeutic action
adverse drug reaction
unintentional, non-therapeutic effect of a medication
contraindication for a medication
means that it should not be prescribed for a client because it has the potential to cause a serious adverse drug reaction
medication half-life
is the time it takes for a medication to decrease in amount by half after it enters the body
onset of action
the amount of time it takes for a medication to produce a therapeutic response
peak effect
is the time it takes for a medication to produce the full therapeutic effect
duration of action
the length of time the therapeutic effect lasts
peak level of a medication
is the point in time at which the medication is at the highest level in the body
trough level of a medication
is the point in time at which the medication is at the lowest level in the body
Extended-release tablets
release the medication over an extended period of time. So client can take less frequently
additive effect of medications
- When two or more medications are given at the same time and have similar actions, an additive effect will occur.
- Clients can take some medications together for their additive effects, so they can take lower doses of each medication.
- Additive effects occur when two or more medications with similar actions are taken at the same tim
Teratogenic medications can cause
Birth defects, fetal malformation
medication precaution
includes disease states, such as kidney disease, or clinical situations in which use of a medication involves particular risks or dosage modification might be necessary
chemical stability
how a medication should be stored and handled to maintain maximum effectiveness
pharmacologic action
the mechanism of action of a medication on the body to achieve the desired effect
an indication of medication hypersensitivity
itching
Tolerance to a medication
develops when it is taken over an extended period of time and the body’s response to the same dose of the medication decreases.
medication interaction
occurs when a client is taking two or more medications together, and it results in an increase or decrease in therapeutic effects or causes adverse medication interactions that could result in harm to the client.
Medication toxicity
-develops when the amount of a medication that is taken is greater than its rate of excretion, and it results in the medication accumulating in the body.
-A client who has renal insufficiency might have delayed or impaired excretion of the medication.
-The medication dosage should be reduced if toxicity occurs.
Withdrawal aka (abstinence syndrome)
If the client is dependent on the medication, withdrawal symptoms can occur when it is abruptly discontinued. Resulting in sweating, tremors, and nausea.
pharmacokinetics
section outlines how the drug is processed in the body through absorption, distribution, metabolism, and excretion
Enteric-coated tablets
1.absorbed in the small intestine
2.slows the absorption of the medication
3.Dissolving an enteric-coated tablet in the mouth destroys its protective coating
4.Medications that irritate the stomach are often covered with an enteric coating that does not dissolve until the medication enters the alkaline environment of the small intestine.
5.Clients should not crush or chew enteric-coated medications because this will damage the enteric coating.
Anaphylaxis
-an immediate and life-threatening allergic response, manifesting as bronchospasm, laryngeal edema, and a rapid drop in blood pressure.
-Immediate treatment with epinephrine and IV fluids is imperative.
Agonist medications
bind to cell receptors in the body and are targeted to a specific type of receptor. When they attach to the receptors, they perform the same action as a hormone or chemical would, increasing the effects of that hormone or chemical. For example, pharmacological insulin is administered to clients who have little to no insulin to mimic insulin’s effects in the body.
Antagonists
are medications that bind with a receptor and either block a response or precipitate a less than typical response.
Competitive antagonists
medications that bind with a receptor and prevent other medications or chemicals in the body from attaching to cell receptors, which means they prevent or minimize certain effects.