Tadalafil can be recommended for patients that are unable to achieve and maintain an erection for long enough to have sex. Tadalafil works in the absolute majority of all cases providing for up to 36 hours of efficiency depending on the patient's age, severity of erectile dysfunction and some other factors. Make sure you take Tadalafil as directed and avoid using it more often than every 24 hours. Tadalafil can be taken as needed or regularly (Tadalafil Soft Tabs). If you are taking this medication regularly try to avoid missing doses. A good way to avoid forgetting is to take Tadalafil at the same time every day. If you missed a dose and it's almost time for the next one - do not take a double dose, just skip the one you missed and carry on taking Tadalafil as before. Taking Tadalafil regularly means that you can attempt having sex any time between the doses. Store this drug in some place where it will not be accessed by other people and make sure other people in your household do not have access to this drug. Although Tadalafil is not expected to cause an addiction, it is associated with a number of serious side effects that are rare but should be nevertheless taken into consideration by anyone taking this medication. The following serious side effects are sometimes possible: sudden vision loss, chest pain, swelling in your hands, ankles, or feet, seizure, shortness of breath, fainting, vision changes, and irregular heartbeat. In many cases you can avoid them by following the instructions provided on the label or those of your doctor. However, in some cases developing some serious side effects has to do with the fact you were not completely honest or forgot to mention some other drug you are taking or health conditions that may potentially affect the success of your treatment.