no, 200mg 2x/day isn't ever effective for suppressive therapy , even when not pregnant.
Not in canada so I go by the ACOG recommendations as well as the extensive research by Dr Zane Brown who has done the majority of the research on herpes and pregnancy. The herpes handbook by Terri Warren, our herpes expert here in medhelp, also supports the dose I recommended.
you never, ever, EVER have to take acyclovir if you don't want to, even during pregnancy.