Mt Whitney Zone Forums General Discussion How long does acclimation to high altitude "last"?

Thanks, all. So far, we've only been able to do a couple of 10K'ers (Baldy & San Jacinto), and both my husband & I got headaches. We're hoping to make it to Gorgonio before our Whitney attempt in July. I have an appt with my dr next week to talk about Diamox. Any tips on that?