How Long Does It Take for a Reaction to Show Up? Understanding Onset Timelines
•
5 min read
Over 75% of adverse drug reactions are due to predictable, non-immunologic effects, while the remaining reactions can be unpredictable and immune-mediated. The timeline for **how long does it take for a reaction to show up?** varies drastically depending on the type of reaction, from minutes for a severe allergy to weeks for delayed hypersensitivity.
