I am recovering from acute altitude sickness in which my blood pressure soared to 225/105 for 48 hours. I took one dose of 5mg amlodipine besylate for two days, which only brought my BP to 199/98. I think I had a side effect to the med of headache and fatigue. I am now 18 hrs back to my normal altitude, but I still feel headachy and very tired, even tho my blood pressure is now normal. I am wondering how long will the recovery be from this episode of altitude sickness? thank you.