The onset of effect of painkillers needs to be judged according to the individual’s physical condition, the type of painkiller, the dosage and so on, and cannot be generalized.
Painkillers can be divided into non-steroidal antipyretic painkillers, central painkillers, narcotic painkillers and so on, the efficacy of these painkillers, the onset of action time and so on are not the same.
And different people have different tolerance for painkillers, so it is impossible to generalize how long it usually takes to see the effect after taking painkillers.
Nausea, vomiting, dizziness and other uncomfortable symptoms may occur after taking painkillers, so it is recommended to inform the attending doctor promptly if there is any discomfort.