Lariago is the brand name of a medicine called chloroquine. Even though it can be used both for prevention and treatment of sensitive malaria, for prophylaxis it is mostly recommended for people who are - 'non-immune' i.e. generally people coming from non-malarial regions (of Europe, North America etc) to malaria-prone countries for short duration. Long-term prophylaxis for residents of malarial regions is not practical. You have not given the dose and duration of use of chloroquine but I doubt the symptoms are due to the use of this drug.