I am pretty sensitive and start very low and slow with most things. However, I have discovered with parasites, that actually makes things worse.
When I have had success with antifungal herbs, I took them for a month or longer before expelling masses of pathogenic stuff. For up to two weeks prior to the expulsions, I experienced increased fatigue, joint pain, muscle weakness, bouts of sudden weakness, sudden slight dizziness, even stabbing pains in my joints. When the expulsions occurred, I had headaches, nausea, diarrhea, and sometimes vomiting. Once it was over, I felt so much better.
I would now rather kill it faster and get really sick for a day or two than suffer for weeks on end before getting the mess out of me.
P.S. - Please read the rest of my posts here before drawing conclusions, as I have lots more to say