Since the Primaquine needs a prescript
ion, I assume you are working with a doctor???
The only thing I could find on the three sites I'll list below is that you need to take the Ivermectin on an empty stomach and the Primaquine needs to be kept away from Grapefruit (both fruit and the juice).
umm.edu/health/medical/drug-interaction-toolwww.rxlist.com/drug-interaction-checker.htm/www.drugs.com/drug_interactions.html