I have had bad knee's for the last 20 years or so ,sometime's the pain is excruciating ,I got recommended some tablets called "DIFELENE" from a friend of mind who has the same problems ,I can inform you they have worked miracles for me ,and after taking 10 or so over 48 hours the pain just disappears ,they appear to be easily obtainable from nearly all local pharmacy's and at 30/35 baht a packet are for me a god send ,so if any of you out there as joint problems I strongly suggest you give them a try