Which statement best describes Type B ADRs?

Which statement best describes Type B ADRs?

• A. Bleeding risk with the use of anticoagulants
• B. Bizarre, not due to a known pharmacology of the drug, but seem to be a function of patient susceptibility
• C. Anaphylaxis to penicillin
• D. Delayed, time related (becomes apparent sometime after use)

Answer: (B)

Type B adverse drug reactions are unpredictable and idiosyncratic, arising from the individual patient rather than the drug’s known pharmacology. They’re not dose-related and can’t be anticipated from how the drug works in general; instead, they reflect patient-specific susceptibility, sometimes immune- or genetically mediated. The statement that best describes this perfectly says the reaction is bizarre and not due to the drug’s known pharmacology, depending on the person rather than the drug action. The bleeding risk from anticoagulants is a predictable, dose-related effect tied to the drug’s pharmacology. Delayed, time-related reactions describe a different timing pattern, not the idiosyncratic nature of Type B. Anaphylaxis to penicillin is an immune-mediated event, which can be unpredictable, but the emphasis on non-pharmacologic origin and patient susceptibility is the hallmark of Type B as captured by the chosen description.

Type B adverse drug reactions are unpredictable and idiosyncratic, arising from the individual patient rather than the drug’s known pharmacology. They’re not dose-related and can’t be anticipated from how the drug works in general; instead, they reflect patient-specific susceptibility, sometimes immune- or genetically mediated. The statement that best describes this perfectly says the reaction is bizarre and not due to the drug’s known pharmacology, depending on the person rather than the drug action. The bleeding risk from anticoagulants is a predictable, dose-related effect tied to the drug’s pharmacology. Delayed, time-related reactions describe a different timing pattern, not the idiosyncratic nature of Type B. Anaphylaxis to penicillin is an immune-mediated event, which can be unpredictable, but the emphasis on non-pharmacologic origin and patient susceptibility is the hallmark of Type B as captured by the chosen description.