[Reduced mobility in the elderly due to medication, alcohol, and cannabinoids].

Many diseases are accompanied by symptoms that can impair the ability to perform complex everyday tasks, such as active participation in road traffic. If a cure is not possible, the aim of drug therapy is to alleviate the symptoms to such an extent that the patient no longer has any restrictions in everyday life. However, around 20% of the approximately 100,000 medicines licensed in Germany have traffic-relevant side effects that can also lead to driving impairment.It is assumed that the effect of a drug is at least partially responsible for one in four traffic accidents and that one in ten victims of fatal road accidents has taken psychotropic drugs before driving. In addition to alcohol and drugs, medications from the benzodiazepine, opioid, and antidepressant groups are suspected of impairing driving safety in particular. The effects of these substances on young people have been described many times, but this review deals specifically with the traffic-relevant (side) effects of various classes of drugs on elderly people (aged 65 and over).Older people in particular often have to take different medications, which are metabolized differently compared to younger people due to underlying diseases and can also interact with each other. It was found that (1) older people often react more sensitively to substances, (2) not all representatives of a drug class have the same effect on driving safety, and (3) a general assessment of a drug's safety is not possible, since the effects also depend on other factors such as underlying diseases, treatment regimen, and the time of day the medication is taken.