I think you’re talking about the new medication approved to treat postpartum depression.
Increased risk of suicidal thoughts and actions is a very commonly listed side effect of a great deal of antidepressant medications. That’s why you’re supposed to be closely supervised when you start them and report any oddities to your doctor asap.
So it doesn’t increase suicidal tendencies across the board, only in those who are susceptible to that side effect.