You know, I like kinda looking at things systemically-- I mean sure, you're wife MIGHT be genetically predisposed to a really extreme variant of PMS. Still: having the genetic predisposition is meaningless unless you have the environment that can exploit it.
If I were either of the two of you-- instead of being very reductive and trying to treat this PMS with a pill-- try and find ways to balance your body and all of its functions holistically. PMS symptoms are entirely dependent of your physiology-- and your physiology is dependent on the environment acting on your gene pool.
Like, try and get her into an exercising routine. Really, really try and provide her body with the nutrition she needs (Dr. pepper and candy is poison, brother). The best thing is this: even if these lifestyle changes don't improve her PMS and insomnia, they will still improve her health period, no discussion.
So, after trying this and nothing works, THEN you could have that conversation with your wife to pursue medication that addresses extreme PMS
Sent from my iPhone using Tapatalk