"Cialis Sublingual" is a formulation of tadalafil designed for the treatment of erectile dysfunction (ED). It is presented as a tablet that dissolves under the tongue, a method intended to allow for faster absorption of the active ingredient directly into the bloodstream, bypassing the digestive system. As a PDE5 inhibitor, its mechanism of action is to increase blood flow to the penis following sexual stimulation. It is important to note that this is typically an unlicensed generic product, not an official formulation from the original manufacturer. This raises significant concerns regarding quality control, dosage accuracy, and purity. Despite the alternative delivery method, it carries the same potential side effects and contraindications as standard tadalafil, including the absolute contraindication for use with nitrate medications due to the risk of a severe and dangerous drop in blood pressure. A medical consultation is essential to discuss the risks associated with such unregulated products.