Drugs and their effects (cont) The setting where the user is who they are with changes in the setting during use The route of administration There are five main ways a drug can be taken (orally, by injection, by inhalation, absorption via mucous membranes and skin patches) and this has a significant impact on the effects of the drug in terms of: onset (how soon the effects of the drug are felt) intensity (how strong the effects of the drug are) duration (how long the effects of the drug last) Quiz This is a short quiz designed to test your knowledge on classifying drugs. Click on the link to begin. Classifying Drugs