My family has had issues with generic thyroid medication. We could see and feel the inconsistencies from script to script. My doctor had similar stories for her own scripts. The retailer also has some responsibility edibility for script variation by using more than one generic supplier for a drug, resulting in more variation.
After going through our experiences with V, I would say the FDA and Congress are not making generic equivalency a priority. Simply a numbers game for political purposes.
Do any of these generic companies have American production facilities?