Narcotics, psychotropic drugs, stimulants or other similar substances is one of the topics in the General rules block of the Spanish DGT theory. Defines who the traffic rules apply to and where, the basic definitions and the principles behind the whole theory. Understanding this section well helps you answer the theory-exam questions on this topic with confidence.

In simple terms, this point of the DGT theory establishes that drivers of vehicles or bicycles who have ingested or incorporated into their body psychotropic, stimulant or other similar substances, which must include, in any case, medicines or other substances under the effect of which the appropriate physical or mental state for driving safely is altered, may not circulate on roads subject to legislation on traffic…

The exam often asks where and to whom these rules apply; read the options carefully, as they frequently change a single word.