Uny, were you applying the garlic tincture topically, or taking it internally, or both? I'm pretty that in your case (internal parasites) you meant you were taking garic tincture internally. I'm also pretty sure that for topical applications, one is advised to apply garlic oil topically, not tincture.
The main reason I ask has to do with the connection in this thread to the use of garlic against MRSA, which is an infection that at least in part manifests topically, so it seems that garlic oil applied topically, while also taking it internally (either by raw clove or tincture or perhaps by pill) will provide a well-rounded approach to remedy.