Pharmacology Fundamentals
Expert-defined terms from the Professional Certificate in Medical Terminology for Health Workers course at UK School of Management. Free to read, free to share, paired with a globally recognised certification pathway.
Adverse Drug Reaction (ADR) #
Adverse Drug Reaction (ADR)
An adverse drug reaction (ADR) is an unwanted or harmful reaction experie… #
ADRs can range from mild side effects like nausea or dizziness to severe reactions like anaphylaxis or organ damage. It is important for healthcare providers to be aware of potential ADRs when prescribing medications to patients to minimize harm and ensure patient safety.
Antibiotics #
Antibiotics
Antibiotics are a class of medications used to treat bacterial infections #
They work by either killing bacteria or stopping their growth. Antibiotics are not effective against viral infections like the common cold or flu. Overuse or misuse of antibiotics can lead to antibiotic resistance, making infections harder to treat in the future.
Anticoagulant #
Anticoagulant
An anticoagulant is a medication that helps prevent blood clots from form… #
Anticoagulants are commonly used to treat or prevent conditions like deep vein thrombosis, pulmonary embolism, and atrial fibrillation. Examples of anticoagulants include warfarin, heparin, and rivaroxaban.
Antidepressants #
Antidepressants
Antidepressants are medications used to treat depression, anxiety disorde… #
They work by affecting neurotransmitters in the brain to improve mood, sleep, and overall well-being. There are different classes of antidepressants, such as selective serotonin reuptake inhibitors (SSRIs), tricyclic antidepressants (TCAs), and serotonin-norepinephrine reuptake inhibitors (SNRIs).
Anti #
inflammatory
An anti #
inflammatory is a medication that helps reduce inflammation in the body. Inflammation is a natural response to injury or infection, but excessive inflammation can cause pain, swelling, and tissue damage. Common anti-inflammatory medications include nonsteroidal anti-inflammatory drugs (NSAIDs) like ibuprofen and corticosteroids.
Antipyretic #
Antipyretic
An antipyretic is a medication that helps reduce fever #
Fevers are a common symptom of infections and other medical conditions. Antipyretics like acetaminophen and ibuprofen work by lowering the body's temperature set point in the brain, helping to bring down fever and improve comfort.
Bioavailability #
Bioavailability
Bioavailability refers to the proportion of a medication that enters the… #
Factors like drug formulation, route of administration, and metabolism can affect a medication's bioavailability. High bioavailability ensures that a sufficient amount of the drug reaches its target site to produce the desired therapeutic effect.
Contraindication #
Contraindication
A contraindication is a specific situation or condition where a medicatio… #
Contraindications can be based on factors like allergies, medical history, or drug interactions. It is essential for healthcare providers to be aware of contraindications to avoid adverse reactions in patients.
Cytochrome P450 (CYP450) #
Cytochrome P450 (CYP450)
Cytochrome P450 (CYP450) is a group of enzymes found in the liver that pl… #
CYP450 enzymes help break down drugs into smaller molecules that can be eliminated from the body. Genetic variations in CYP450 enzymes can affect how individuals respond to certain medications, leading to differences in drug efficacy and toxicity.
Dependence #
Dependence
Dependence refers to a state where the body has adapted to a medication a… #
Dependence can occur with certain medications like opioids, benzodiazepines, and stimulants. Withdrawal symptoms may occur when a dependent individual stops or reduces their medication use, leading to physical and psychological discomfort.
Drug Interaction #
Drug Interaction
A drug interaction occurs when two or more medications interact with each… #
Drug interactions can lead to reduced effectiveness, increased side effects, or unexpected reactions. Healthcare providers should be aware of potential drug interactions when prescribing multiple medications to a patient to ensure safe and effective treatment.
Half #
life
The half #
life of a medication is the time it takes for half of the drug to be eliminated from the body. Half-life is an important pharmacokinetic parameter that influences dosing intervals and drug accumulation. Shorter half-lives require more frequent dosing, while longer half-lives allow for less frequent dosing and steady-state concentrations.
Metabolism #
Metabolism
Metabolism refers to the process by which the body breaks down and transf… #
Metabolism occurs primarily in the liver through enzymatic reactions that convert drugs into more water-soluble compounds for elimination. Genetic variations in drug metabolism enzymes can affect how individuals respond to medications.
Off #
label Use
Off #
label use refers to the practice of prescribing a medication for a purpose other than its approved indications. Off-label use may be based on clinical evidence, expert opinion, or patient need. While off-label prescribing is legal and common in healthcare, it is essential for healthcare providers to consider the risks and benefits of such use.
Over #
the-Counter (OTC)
Over #
the-counter (OTC) medications are available without a prescription and can be purchased directly by consumers. OTC medications are typically used to treat mild symptoms like headaches, colds, and allergies. It is important for individuals to read and follow the instructions on OTC medication labels to ensure safe and effective use.
Pharmacodynamics #
Pharmacodynamics
Pharmacodynamics refers to how medications interact with the body to prod… #
Pharmacodynamics includes mechanisms of action, receptor binding, and physiological responses to drugs. Understanding pharmacodynamics is essential for predicting drug effects, optimizing dosing regimens, and minimizing adverse reactions in patients.
Pharmacokinetics #
Pharmacokinetics
Pharmacokinetics is the study of how the body absorbs, distributes, metab… #
Pharmacokinetic parameters like absorption rate, bioavailability, distribution volume, metabolism, and half-life influence a drug's concentration and effect in the body. Knowledge of pharmacokinetics helps healthcare providers tailor medication regimens to individual patient needs.
Placebo #
Placebo
A placebo is an inactive substance given to a patient to test the psychol… #
Placebos are commonly used in clinical trials to evaluate the efficacy of new medications. The placebo effect refers to the phenomenon where a patient experiences improvement in symptoms despite receiving an inactive treatment.
Prescription #
Prescription
A prescription is a written or electronic order from a healthcare provide… #
Prescriptions include details like the drug name, dosage, route of administration, frequency, and duration of treatment. It is essential for patients to follow their prescription instructions carefully to ensure safe and effective use of medications.
Side Effect #
Side Effect
A side effect is an unintended or secondary effect experienced after taki… #
Side effects can be mild, moderate, or severe and may vary depending on the individual and the drug. Common side effects include nausea, dizziness, headache, and fatigue. Healthcare providers should inform patients about potential side effects when prescribing medications.
Therapeutic Index #
Therapeutic Index
The therapeutic index is a pharmacological measure that compares the dose… #
A higher therapeutic index indicates a wider margin of safety, while a lower therapeutic index suggests a higher risk of adverse effects. Therapeutic index values help guide dosing decisions and monitor drug safety.