Meats, in limited quantities and USDA approved, should be frozen and packed in ice. Use of dry ice is severely restricted by the airlines. We would not recommend using it. Packaged items such as canned and dry goods that are carried in for your own consumption are normally allowed. Items may be subject to inspection.
Restrictions can vary from time to time and from official to official.
Having your receipt for the items may be helpful for duty purposes. Medications should be carried in a bottle with the written prescription and in quantities relative to your length of stay. No fresh fruits or vegetables. Meats, in limited quantities and USDA approved, should be frozen and packed in ice. Use of dry ice is severely restricted by the airlines.