From what I've read on here most people don't bother with 2% at all and just go straight for the 5%.
There are statisitcs somewhere on how much more effective 5% is over 2% that you can Google if you really need to see them before making a choice.
HTH
Has anyone increased from 2 to 5 and felt it made things worse? I was on minoxidil 2% for about 4 years with success and switched to 5% about a year ago. Just at the time I switched I feel things got worse. Has my minoxidil window just closed in general or has my hairloss just picked up? Could the increased dose cause this?