How safe is it for 61 year old female to take Motrin 800 mg 1 or 2x daily every day for few wks for severe neck pain ? Have 2 artificial discs & plate c2-c7, arthritis in neck, severe muscle rigidity, stenosis, radicular pain,etc. what about alternative- taking 1/2 tablet of tylenol 4 w/ codeine 1-2 daily?