Restriction of access to means used for suicide.

One of the most effective public health measures to prevent suicide is the restriction of access to means used in suicidal acts. This approach can be especially effective if a method is common and readily accessible. Suicide methods vary widely, and there have been several examples where means restriction has been applied, often with considerable success. Factors contributing to availability of suicide methods can include access to physical means as well as cognitive awareness of methods. In this paper, which is the second in a Series on a public health approach to suicide prevention, we focus primarily on examples of restricting access to physical means of suicide, such as pesticides, firearms, and medication. We also discuss restricting the cognitive availability of means through attention to media and other representations of suicide methods. There are challenges associated with restricting access to means, including resistance to measures required to change the availability of some methods (which might, in part, be commercially determined) and method substitution, whereby one suicide method is replaced by another. Nevertheless, means restriction must be an integral part of all national and local suicide prevention strategies.