Headaches, daily.Strong painkillers daily. Any suggestions.?

My wife gets h/a every day. Vary from bad to severe.Every test has been done, all a waste of time. She is a dynamic person, never complains but takes 2-4 or more tabs./day.Realises adverse effect this will have on kidneys etc. but has no choice. Fell down steps as kid,but adjustment of spine, no help.Sting in tail is son also gets very regular headaches. Very unfair, as daughter & I don't know what a h/a is. We are aware that one can get hooked on painkillers, but I get shot down in flames if I suggest such.What sort of damage can regular intake of codeine phosphate,paracetamol 450mg., codeine (adco-dol) have and over what sort of time period can one carry on so.We can not afford any further fancy med. treatment. Any suggestions? My wife will not see any of this unless........

I am a woman and mother that gets headaches everyday. I get migraines during my cycle. But when I'm not having a migraine, I get h/a which are difficult to relieve. It's a sticky situation. If I have painkillers I take them. The problem is getting them, most MD's are not very generous to prescribe heavy painkillers for h/a. Because they can't see on x-ray, mri, cat scan, etc, they question it. Most OTC pain relievers don't help any of my h/a's. Frankly it's hard to function on a daily basis with a constant h/a. It's a slippery slope. If you've not experienced it, you can't quite understand it. If you saw a broken bone or a surgical scar it would be easy to comprehend. Just have compassion, it's not her fault. She'd rather not have to deal with it at all I'm sure, pills or no pills. This prob doesn't help but you are not alone.