Tests for the detection of narcotic substances, psychotropic drugs, stimulants or other similar substances

Tests for the detection of narcotic substances, 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 practice, this comes down to the following:

  • The tests will normally consist of a medical examination of the obliged person and the clinical analyses that the forensic doctor or other experienced professional, or the medical staff of the health centre or medical…
  • The authority agent in charge of traffic surveillance who notices obvious symptoms or manifestations that reasonably indicate the presence of any of the above-mentioned substances in the body of the persons referred to…
  • The competent authority must determine the programs to carry out preventive controls to detect narcotics, psychotropic drugs, stimulants or other similar substances in the body of any driver.

In short, the rule makes sure every road user knows what to expect in this situation.

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

📜 Reference legal text — Article 28 (1)

Tests for the detection of narcotic drugs, psychotropic substances, stimulants or other similar substances, as well as the persons required to carry them out, shall comply with the provisions of the following paragraphs:

  • The tests will normally consist of a medical examination of the obliged person and the clinical analyses that the forensic doctor or other experienced professional, or the medical staff of the health centre or medical institute to which the person is transferred, consider most appropriate.

At the request of the interested party or by order of the judicial authority, the tests may be repeated for contrast purposes, which may consist of blood, urine or other similar tests.

(b) Any person who is in a situation similar to any of those listed in Article 21, with respect to the investigation of alcohol levels, is obliged to submit to the tests indicated in the previous paragraph. In the event of refusal to carry out said tests, the officer may proceed to immediately immobilize the vehicle in the manner provided for in Article 25.

  • The authority agent in charge of traffic surveillance who notices obvious symptoms or manifestations that reasonably indicate the presence of any of the aforementioned substances in the body of the persons referred to in the previous article shall comply with the provisions of the Criminal Procedure Law and with whatever is ordered, where appropriate, by the judicial authority, and must adjust his actions, as far as possible, to the provisions of this regulation for alcohol detection tests.
  • The competent authority shall determine the programs to carry out preventive controls to detect narcotics, psychotropic drugs, stimulants or other similar substances in the body of any driver.
🔗 Read the official text on the BOE (Spanish General Traffic Regulations)

❓ Frequently asked questions

What is tests for the detection of narcotic substances, psychotropic drugs, stimulants or other similar substances?
Tests for the detection of narcotic substances, psychotropic drugs, stimulants or other similar substances is a DGT theory topic within the «General rules» block, governed by Artículo 28 (1) of the Spanish General Traffic Regulations. Above you will find a simple explanation and the reference legal text.
Does this topic appear in the DGT theory exam?
Yes. Every section of the General Traffic Regulations can appear in the theory exam. To practise with real questions, go to the TraficoTest platform.
Where is it regulated (Article 28 (1))?
This content comes from Article 28 (1) of the Spanish traffic regulations. You can read the official text on the BOE.

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