Abstract: Addictive drugs like cocaine, heroin or amphetamines are spreading in an epidemic manner in the western world and are an important factor in the spread of the acquired immune deficiency syndrome AIDS (multiple use of infected needles among drug addicts) the present invention describes a vaccine and immunoserum against drugs. The vaccine contains the drug bound to a carrier protein in order to produce antibodies against the drugs in the affected person. The use of the drug in the presence of the antibodies deactivates the drug. The desired drug effect is thus eliminated and the vicious circle between stimulation and application is broken.