HELLO,   THYROID MEDICINES CAUSES LOSS OF CALCIUM.IN TERN OSTEOARTHRITIS THAN OSTEOPOROSIS. SO WE HAVE TO ADD CALCIUM FROM OUTSIDE, THIS IS ALSO ONE OF THE CAUSE FOR CRAMPS. VITAMIN C, E DEFICIENCY ALSO CAUSE CRAMPS. TABLET CAVIT PM ONE AT NIGHT FOR LONG-TERM BASIS. TABLET VITAMINS D3 60, 000 I.UONE PER WEEK FOR EIGHT WEEKS THAN ONE PER MONTH FOR SIX TO EIGHT MONTHS. CAPLET EVION600 ONE AT NIGHT FOR LONG TERM BASIS. TABLET LIMCEE ONE TABLET TO BE SUCK THREE TIMES A DAY FOR ONE MONTH. I HOPE THIS HELPS YOU. O.K BYE.