After taking ivermectin, it typically takes about 24 to 48 hours for the medication to start killing parasites in the body. However, the exact onset of action may vary depending on the type of parasite being targeted and the severity of the infestation.
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While ivermectin works relatively quickly, it may take several days to fully eliminate all parasites from the system. So, while you're waiting for those pesky parasites to meet their demise, perhaps take up a hobby or plan a fun distraction to pass the time!