How long should we wait after chloroquine treatment

Patient: Hi dear doctor, my husband used a drug “chloroquine 150 mg”,1 tablet every day for 40 days.he is 33 years old.I want to know how long after not taking this drug i can to be pregnant??

Doctor: Chloroquine and its metabolites get widely distributed in the body and may take approximately about 60 days to completel y clear from the tissues. You may be safe to conceive following this period.