Most vacation makers can simply use their own passports to enter Macau if they intend to stay between 30 and 90 days. You can also get your visa in Macau as soon as you arrive here. Remember that a duty free quota of 100 cigarettes and 1 liter of spirits applies to visitors here.
The MOP or Macau Pataca is the official currency although Hong Kong Dollars or HKD is widely accepted here as well. The exchange rate indicates that the HKD is slightly more valuable than the MOP.
Macau does have two reasonably big hospitals that are equipped to handle emergencies at any time of the day or night. Special medical precautions may not be necessary but carrying your stash of medicines for emergencies is still a good idea because you may not be able to find a pharmacy quickly when you need to.
If you are planning a vacation in Macau, keep in mind that May is definitely avoidable because of the heavy rains that lash the islands during this month. October to December when autumn holds sway here is the best time to visit. The daytime weather may be quite pleasant but it may be a good idea to cover yourself up if you intend to head out after night. January to February months can get really cold as the Siberian winds sweep over the islands at this time...