Hi Barb, a Z-Pack (Zythromax) is a great Idea, but remember that Alcohol and Antibiotics don't mix...
The rule is 1 glass of water per hour.
If your DH has a DVD player in his Laptop, you might consider bringing a few movies (along with 2 headsets and a splitter) I know your friend Nephosaurus makes us take along Willy Wonka and The Chocolate Factory whenever we pack a DVD player. Must airplanes (AA) Have a Cigarette lighter type of power adapter under the seats in Business class. The headsets are a good idea anyway because they are selling them now on some flights so you can watch the movie. Another suggestion is a CD with an audio book that you don't mind hearing a few times (Harry Potter and the order of the Phoenix is like 24 cds long)
As far a sleeping pills go, Ambien is good, My parents used to take one that they took off of the market because people hurt people and didn't remember it, I forget the name. Call your Dr. I think the one that they are all prescribing now is Sonoma (that is what my Dr. gave me to get to sleep) I would check with your Dr. about the dryness of the air and what to take.
Also, remember...Mile High...

(just kidding....)
I would also recommend packing several bottles of water in your rolling suitcase (double Zip-locked, and not enough to throw you over the weight limit) Bottled water is expensive there, and may be difficult to get to. You can leave most of what you don't drink, and the space that they took up will be filled with souvenirs.
Make sure that your carry on has a change of clothes, essential toiletries in case your bags take longer to get there than you do. I would also pack a few snacks because there is a limit to airline food, and you never know when your eyes will get glassy.
If you have a contact there, have them or a member of their family take you on any outings; in many of these countries Round-Eyes are looked down upon and they will bump the prices way up. It also helps to have your own translator and someone who knows the lay of the land...
Once you get to the hotel grab a few books of matches, or a cards from your hotel. If you get lost you can hail a Taxi and show them this and there is no doubt where you want to go if they do not speak English.
Also, when you get into your room locate the fire exits on your floor and where the stairs are. In case of an emergency it is always better to be prepared.
You will gain the day back when you return; I remember when we came back from Seoul, we left Tokyo 30 minutes after we arrived back in Dallas (International date line etc). I was a little freaked out by this.
Contact the hotel a week or so before you leave and see what kinds of tours they offer, your DH will be in meetings all day, and an organized tour can be safe and interesting. A lot of times the most popular ones fill up, so if you make the reservation before you leave it takes the worry out.
Be careful of "illegally transporting pornography" some countries consider Cosmopolitan illicit.
Make sure you have plenty of batteries for your (New) digital camera!!! (and any other electronics. Batteries there are more EXPENSIVE than at WDW!!!!!)
Above all, have a great time and post a trip report with lots of pictures!!!
