Yes, both. Things have changed lately for Dignitas as the mentally ill can have access to assisted suicide. The process is more complex, not as straightforward as for someone with physical illness. But possible now. See the information from Dignitas below.
Assisted voluntary death proceedings for people with mental illnesses
Some time ago the Swiss Federal Supreme Court has acknowledged that basically every mentally competent person has the right to determine the moment and the manner of his or her own end of life; a court ruling which was confirmed by the European Court on Human Rights. This signifies that mentally ill may sub- mit a formal request for the preparation of an accompanied suicide to DIGNITAS – provided that they are found competent to make a rational choice in his or her own best interest (decisional capacity) and submit an in-depth medical ap- praisal established by a doctor of psychiatry, in which this and other ques- tions are thoroughly assessed, concluding a severe, long term, therapy re- sistant psychiatric illness and confirming decisional capacity in relation to the wish to end life.