The invention is directed to a sublingual tablet comprising sildenafil citrate in an amount comprised between 10 mg and 150 mg, and a non-ionic surfactant in an amount comprised between 20 and 100 % by weight of the amount of sildenafil citrate, wherein the nonionic surfactant is a polyethoxylated compound comprising a polar and a non-polar part, wherein the polar part of the molecule comprises from 3 to 8 ethoxy groups and the non-polar part is a C4- C20 alkyl group or a C7-C20 aryl group. The sublingual tablet is prepared by a process that comprises the following steps: introducing sildenafil citrate into a mixer； adding to the mixer containing sildenafil citrate the nonionic surfactant in at least three aliquots and mixing for 5 minutes after the addition of each aliquot. The tablet according to the invention is characterized by a high concentration of sildenafil, is easy to take, and with a good taste in the mouth.
