Different people need different strengths of sleep aids....what your wife takes is probably just right for her....and would be too much for someone else.....you know what I mean? Doctors think something is very strong when, depending on the person, it may not be that strong to them....it's just what they need.....doctors don't seem to understand that people have different tolerance to meds.....what might be super strong to one person and knock them out.....may be exactly the amount of sedation the other person needs...