Im coming off a Pmag run.. its good stuff! I ran it at 75 all the way through (6 weeks). Most of my research showed nothing added came from dosing 100, but like the above poster said, its possible that larger individuals could get a boost from a higher dose.
50mg is a waste of money on H-drol. Seriously, its the most heavily hit subject on this board. 50 for the first week maybe, then 75 for the rest of the 6 weeks is the only way to go. Anything less, you might as well be giving your money to the bum on Fifth and High.
PCT for both Phs is basically the same.
Cycle Assist 4 caps x2 day
Either Cels PCT Assist or (my new favorite) AIs Post Cycle Support
Inhibit - E (cheapest AND works the best) 2/2/1/1
Lots of folks will tell you to get a SERM. You can if you'd like. But H-drols sides are sooo mild (P-Mag too for that matter) I know of people who have ran it with no PCT at all or just ran Formex for four weeks to recover. Im not sure thats wise, but its been done.
I ran 2 H-drol cycles and now the P-mag. If its your first, Id go with H-drol. Just be patient.. it dosent kick in till week 4 on most folks. I ran the above PCT or some variation of it for all three PCTs.