Mefloquine and its relationship to mood disturbances has been researched to the nth degree in the past.  The bottomline is that if you come into the military with mental health issues, and there are a lot, then put a soldier through a war you are only going to exacerbate those problems to the point one will see depression and suicide even without taking mefloquine.  If there is poor access to mental health resources as there was in the past then one will easily blame the pill rather than the tour of war.

Mefloquine is still used for malaria protection IF the person has no previous history of mental health issues such as depression.  The drug can worsen symptoms of depression, but if the soldiers who use the drug are screened appropriately it is a very safe drug. 

We don't need another inquiry into a drug we know inside out.  Was it prescribed in appropriately in the past,...likely but in most cases once stopped the symptoms resolved.