Glad to hear that you had no issues. For anyone else reading this, I have found that a steady dose of ibuprofen works for me.
I had encountered early AMS symptoms on the two shorter peaks in the 3 Saints last year, but didn't know I had. On Mt. Baldy (San Antonio), we weren't up there long enough for me to know that's what I was starting to feel (plus it was my toughest hike to date, it was raining/hailing, etc., lots of things to distract). On Mt. San Jacinto, I had mild motion sickness from the car ride up before I even started, so I didn't notice the subtle change when we got close to the summit.
Mt. San Gorgonio is where I got bit. I had hydrated plenty, slept enough, ate enough, and drove myself (so no car sickness). Between 9500' and 10K' is where I started to feel nauseous, dizzy, and faint. I would rest, do about 10-20 steps, and have to rest again. I had prepared by bringing ibuprofen, and after taking just a single 200mg dose and resting for 20 minutes, I was fine the rest of the hike.
So when it came to Whitney last year, I figured I better just dose up ahead of time. I took a single 200mg pill every 3 to 3.5 hours (so the effects didn't wear off) starting at the trailhead at 4AM. However, the last dose I took was around 10:30, and we came off the summit around 1:45. For some reason I didn't think I needed anymore ibuprofen since we were descending, but boy was I wrong. I got very dizzy and temporarily blacked out twice on the ridge trail, and both times all I thought was "fall left", so I didn't fall off the trail. (Banged up my left arm/elbow pretty bad on the rocks, as a result.) I was not hungry the entire rest of the way down (we finished at 6:45PM), but I forced myself to have a bar along the way. Even at dinner at 9 or 9:30 that evening, I barely ate a few ounces of food, and didn't get back my appetite until the next morning.
I'm between 135 and 140 lbs, 39 years old next month, and I rarely take ibuprofen for anything - your dosage requirements may vary. I am also fairly active besides hiking (playing soccer twice a week), and I tend to metabolize quickly (anesthetics wear off before they "should"). I live in Los Angeles so get no altitude benefits. I have heard aspirin also helps in case you have a tolerance to ibuprofen.
Side note about acclimatization. I read a lot about this in preparing last year, and bottom line is that it takes between 24 and 48 hours to get a meaningful benefit from it. In other words, even sleeping in Horseshoe Meadows the night before probably doesn't do you much good. In fact, if you don't sleep well, the lack of sleep will have more of a detrimental effect.
Regarding Diamox - I have heard more bad things about it than good. When the side effects are as bad as what you are trying to prevent (or worse), best to avoid. Side effects could include dizziness, blurred vision, drowsiness, and upset stomach. Plus, it's a diuretic, which you don't want when you're trying to stay hydrated.
