Drugs can often alter the effects of another drug and vice verca. The interaction between the drugs can often cause adverse reactions or beneficial reactions.
There are different ways as how the body can react to these medications.
Normal Reactions: Nothing unusual occurs, and the body is reacting positively to the medication administered.
Idiosyncratic reaction: a unique, strange, or unpredicted reaction to a drug
Allergic reaction: hypersensitivity to drug that occurs after previous exposure to similar or same drug, and develops rapidly after re-exposure
Anaphylactic shock: idiosyncratic, sudden, and life-threatening allergic reaction
Other Effects
Cumulative effect: occurs when body cannot completely metabolize and excrete one drug dose before next dose is given
Synergism: occurs when combined action of two or more agents produces a greater effect than expected from agents acting separately
Potentiation: a greater effect than expected caused from additive properties of two or more drugs
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