Are There Any Non-Religious Arguments That Are Against Assisted Suicide of the Terminally Sick?

The only real argument I can think of is that the 'assistant' might not understand all the options, and might push that 'solution' when there were others which might be more satisfactory to some people. Personally, I don't feel the government has the right to interfere, and that suicide should be an individual right, and thus that people should be able to help in that as asked.