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When a pharmaceutical company develops a medicine it incurs research, testing, and licensing costs. In return an exclusive marketing license is given, which usually lasts about 15 years. During this period no other drug companies can legally supply the same medicine and the original developer is free to set the price as it sees fit.

This is high blood pressure that occurs in the main artery that carries blood from the right side of the heart (the ventricle) to the lungs. When the smaller blood vessels in the lungs become more resistant to blood flow, the right ventricle must work harder to pump enough blood through the lungs. Tadalafil works on the PDE5 enzyme in the lungs to relax the blood vessels.

In contrast, Park et al. (2018) stated that safety and tolerability features of the ODF formulation were found to be comparable to those of the film-coated tablet formulation [18]. In the same context, Cocci et al. (2017) [19] revealed that sildenafil ODF exhibited comparable levels of safety and efficacy to the conventional film-coated tablet [19]. However, the aforementioned study revealed that the ODF formulation elicited greater overall satisfaction among the patients [19], which could be seen as similar to our findings. Although both formulations demonstrated comparable efficacy in the current study, yet, the ODF tadalafil 5&nbsp