Propranolol can be recommended for patients that have high blood pressure and need to get it under control. High blood pressure can be dangerous, as it may demonstrate no symptoms at all. Make sure you always take propranolol as recommended and avoid using more or less of it that recommended. The following side effects are possible at the beginning of the treatment: vomiting, tired feeling, stomach cramps, nausea, diarrhea, constipation, sleep problems, decreased sex drive, and some other ones. There is no need for you to worry about them, as they will go away on their own. Tell your health care provider if your mild side effects do not go away or change in intensity interfering with your everyday activities. Make sure you take propranolol without skipping does or missing them. If you happened to miss your dose of propranolol - take it as soon as you remembered about it. However, if the next dose is to be taken soon, it's best to skip the dose missed to avoid using too much. Make sure you store propranolol in some place where other people will be able to access it. This medicine is not supposed to be taken by anyone to whom it was not recommended by a qualified health care professional.