An alternative is 100mg/day of doxycycline taken with supper (NOT at bedtime, if it gets stuck in the esophagus overnight you'll have chest pain the next am). Starting 1 day before arrival in malarial area and for 4 weeks after leaving. It should be very cheap and is a very common tetracycline type antibiotic that has been around for years. It does not have the nervous system toxicity of Lariam (which accumulates with long term use because it has a half-life of 7 weeks). It is slightly photosensitizing but taking it with supper mitigates that effect.
It works on chloroquine-resistant falciparum malaria just like Lariam.
Unimog U500 w/Unicat