Instruct: Classify Amazon reviews into positive or negative sentiment
Query: watch which one you buy

i bought the blue box of salonpas at walgreens for my sprained and strained shoulder. the doctor had my on pain meds but nothing was helping. saw the add on the tv and thought well it cant hurt so i tried them. worked wonders for my shoulder went to a diffrent walgreens to buy some more and got the smaller ones in a green and white box. apparently they are diffrent very diffrent i think ill go back to the blue box this green one made it hurt more. so if you try one and it doesnt work try the other you never know.