(polydehydrogenated, polyhydroxylated halomethetioallocholane) 50mg ^halodrol-50 (polydehydrogenated, polyhydroxylated halomethetioallocholane) 25mg ^h-drol since they are the same formula will h-rol work as effectively as halodrol if 2 tabs (equaling 1 halodrol tab) are taken? h-drol is much cheaper because i see the original halodrol for 150 and h-drol is 35