... pills(mallinckro) give me headaches, sweating, n have more pain. I need to take more but won't take over 6 aday. is there a difference. I guess u pay for what u get. the new pills are white. I take one as soon as i get up and I feel nothing. I was always thankful for the relief in my spine and legs with the yellow pills but nothing with the white one. My 30 days is almost over should I go back to other store and pay more?