2.5 mg of la tadalafil is a small dose that can be taken as one tablet per day or as needed before sex. The recommended starting dose of tadalafil is 10 mg, which can be increased to 20 mg or 5 mg depending on the individual’s efficacy and tolerance of the dose, and a percentage of people usually take 2.5 mg for significant results as well, which can be taken as needed before sex.2.5 mg tadalafil can also be taken as one tablet per day. Tadalafil can cause side effects such as headaches, nausea, and blurred vision, and it is important to seek medical attention in the event of more serious side effects. Tadalafil is contraindicated in people who are allergic to any of the ingredients in the product, patients who are taking any form of nitrates, guanylate cyclase stimulators, women, children and other people. The drug should be applied under medical supervision.