For all of you who prefer to be ?safe than sorry? I have enclosed just a PARTIAL list of the complications of Chloroquin phosphate antimalarial prophylaxis. Ocular reactions: irreversible retinal damage in patients receiving long term or high dose therapy. Visual disturbances including blurring of vision and difficulty of focusing or accommodation. Convulsive seizures Nerve type deafness, tinnitus, reduced hearing. Anorexia, nausea, vomiting diarrhea, abdominal cramps Pleomorphic skin eruptions, pigment changes, eruptions and hair loss Mild headache, psychic stimulation Hypotension (rare) electrocardiographic changes Blood disorders (dyscrasias) Since it is concentrated in the liver it should be used with caution in patients with liver disease, alcoholism, or used in conjunction with other hepato-toxic drugs A number of fatalities have been reported following the accidental ingestion of Chloroquine phosphate in relatively small doses. The use of medication should not be taken lightly. ALL medication (including aspirin) has the potential for adverse reactions. ONLY take medications when there is a clear indication for same and on the advice of your physician.