Severe, unexpected, and potentially dangerous reactions to a medication.
An easy way to remember the difference is using the letter : Pharmacody n amics looks at what the D rug does. 1. Pharmacokinetics: The Journey of a Drug
A predictable, secondary effect of a drug that is usually mild (e.g., drowsiness after taking an antihistamine).
Drugs don't work by magic; they work by binding to receptors. Imagine the receptor is a lock on a cell door. The drug is the key. pharmacology for dummies pdf
These drugs bind to a receptor but do not activate it. Instead, they act like a broken key jammed in a lock, blocking other natural chemicals or drugs from binding. For example, beta-blockers sit on heart receptors to prevent adrenaline from spiking your heart rate. The Therapeutic Index
Antihypertensives: Medicines used to lower blood pressure, like Beta-blockers or ACE inhibitors.
Fastest route. The drug enters the bloodstream directly, achieving 100% bioavailability immediately. Severe, unexpected, and potentially dangerous reactions to a
PD also explains why different people may have different reactions to a drug, covering concepts like tolerance, dependence, and what happens when you take a drug for the first time versus the hundredth time.
Instead of "Warfarin has a half-life of 40 hours," remember: "Warfarin (rat poison) takes almost two whole days to leave the blood, which is why you can't eat broccoli (Vitamin K) one day and stop bleeding the next."
Pharmacodynamics focuses on the biochemical and physiological effects of drugs. It explains the mechanisms of action—specifically how a drug binds to cellular receptors to trigger a therapeutic response or a side effect. 2. Routes of Drug Administration Pharmacokinetics: The Journey of a Drug A predictable,
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Right patient, right drug, right dose, right route, right time.