Ivertac Tablet 6mg Online – Uses, Side Effects & Order in USA & UK One of the most reliable antiparasitic drugs on the market today is Ivertac Tablet 6mg, which is prescribed extensively in the US, UK, and Canada. This tablet contains Ivermectin, an active ingredient that is well-known for its efficacy against both internal and external parasites, and is intended to treat a variety of parasitic infections.