The laser acne medicine uses a laser beam to eliminate the infectious germs that are in charge of the problem. The laser penetrates the skin to its deeper amounts with different wavelengths and thus treat the damaged region which needs acne medicine or laser acne treatments. Whereas in case of acne scars treatment the acne medicine is offered for the area of skin that is damaged and holds marks of the damage that was done because of acne and acne. The laser acne scarring treatment is normally referred to as epidermis surfacing wherein the individual providing the treatment holds a laser pen just over the affected area and waves or techniques the beam backwards and forwards, making the unwanted tissues vaporize in heat and therefore creates a fresh surface or stand for the brand new cells or cells to grow and form a new layer of skin, therefore the name ‘laser surfacing’.Idiopathic pulmonary arterial hypertension was the most frequent diagnosis, and nearly all patients had been in WHO functional class III or II. A total of 44 percent of the sufferers were getting treatment with endothelin-receptor antagonists , and 6 percent were receiving prostanoid therapy ; 50 percent had been receiving no additional treatment for pulmonary arterial hypertension. A complete of 38 individuals withdrew from the study before week 12 . Dosing In the two 2.0 mg three times daily, 6 percent 1.5 mg 3 x daily, 3 percent 1.0 mg three times daily, and 2 percent 0.5 mg three times daily. The dosage of the study drug was decreased in 31 patients in this group in comparison with 11 patients in the placebo group.