go to www.cdc.gov
according to the CDC, cusco and lima are not in the malaria zone, so you do not need to take malaria prophylaxis.
another piece of advice, take malarone instead of lariam. lariam makes you psycho.
The CDC link and the side effects of Larium have been posted above. Chi is also back home now. Hopefully, she will visit TP again to update us on her experience with the medications.