"Switzerland's laws that prohibit killing continue to apply in full. Direct, active euthanasia (deliberate killing in order to end the suffering of another person) is therefore also forbidden. By contrast, both indirect, active euthanasia (the use of means having side-effects that may shorten life) and passive euthanasia (rejecting or discontinuing life-prolonging measures) – while not governed by any specific statutory provisions – are not treated as criminal offences provided certain conditions are fulfilled."
Source: http://www.bj.admin.ch/content/bj/en/home/themen/gesellschaf...