Do we need more stronger Anti-Depressant drugs for 2011?

although i don't have any sort of depression, I'm certant that the reason companies do not make stronger pills for people suffering from depression is that it would be ALOT easier to overdose if you wanted to, or even accidentally for people who are easily affected by those sort of drugs, also the amount of damage the pills would do to someone's kidneys and vital organs would be rediculous considering that those perticular type of drugs affect peoples organs now at the strength they are at.