well most methylated orals (halo, for example) are also going to hammer your cholesterol, it should bounce back after cycle and PCT, maybe a month or two post, naturally... assuming you're healthy and have no other pre-existing conditions.
That said, you need to address why your cholesterol is even higher than normal in the first place. Maybe it's your diet (greasy foods) or maybe it's your partying habits (drinking bit much?) or maybe if you're a smoker it can also be elevated. What I'm saying is there's some corrective measures you can take by examining what you ingest on the daily basis to keep a steady healthy range for cholesterol. Yes, you can most likely start the cycle and be ok, but I would still take a good look into why your values are high, specially if you're young, and fix the root cause (by changing diet or dropping smokes, or drinking less, or whatever other contributing factor you got)