Greaves J, Evans D A, Fletcher K A
Br J Clin Pharmacol. 1980 Sep;10(3):293-5. doi: 10.1111/j.1365-2125.1980.tb01758.x.
1 Red cell methaemoglobin levels were found to be significantly raised in healthy subjects given a 14-day course of primaquine with chloroquine on the first 3 days. 2 The methaemoglobin levels were not related to the quantity of primaquine excreted. 3 No primaquine could be detected in the plasma at 24 h following the last three daily doses.