I think we have to face that the FDA is incompetent and corrupt. Getting a drug approved is more dependent on how much money you want to spend than on whether it works. Some drugs that may be effective are delayed for years and years ( http://well.blogs.nytimes.com/2015/02/05/for-a-l-s-patients-... ) while other drugs that don't work are approved as being effective.
And this article doesn't even cover 95% of the problems with the FDA, many of which are as bad or worse. But on this topic, here is a good example that the article missed: http://www.washingtonpost.com/wp-dyn/articles/A9802-2004Sep9... Basically the FDA ordered pharma companies bury the research showing that antidepressants were ineffective in children and could lead to suicide, because they were worried that parents…
As for the suicide risk, again, there is data to suggest that antidepressants can increase the risk of suicide. However, that data isn't cut and dry. Over the last few years the FDA has actually loosened it's warning since the data is in question. Note that the FDA required all of these drugs to have a black box warning stating the risk of suicide (the most strict warning any drug can have).
Producing and testing drugs does not result in a binary outcome (drug good/drug bad). What the FDA does is look at the risk/benefit and makes a decision on that. Frankly I think they do a pretty good job at it.