I'm constantly tired all of the time is there any medicines or vitamins that can give me energy?

Tired: Before embarking on medicine or vitamins analyze your sleeping schedule. You should be getting 8-10 hours of sleep at night. If not, have a quiet hour before going to bed.Turn off all electronic devices, listen to soft music, take a warm bath and read a relaxing novel. You should also schedule an appointment with your doctor to make sure you are not anemic or hypothyroid.

Possibly...: Ongoing fatigue can be a symptom of a number of different issues, and so the first thing you would want to do is make an appointment with your physician for some bloodwork (cbc, metabolic panels, etc) and a possible sleep study to make sure there is not a physical reason for the fatigue. If all is ok, regular exercise, nutrition, and healthy sleep habits will be more helpful than meds.