iTAKE 1/2 TABLET OF 50 mg BY MOUTH TWICE A DAY FOR A LONG TIME NOW. I AM TIRED ALOT AND HAVE LOW ENERGY. I AM 84 YRS OD AND AM IN GOOD HEALTH. I JUDT HAD A KNEE REPLACEMENT AND AM ALMOST READY TO GET BACK ON THE GOLF COURSE BYT AM TIRED ALOT. I ALSO TAKE LISINOPRIL AND ELIQUIS. eLIQUIST 1 TABLET 5mg TWICE DAILY AND LISINOPRIL 1 10 mg TAB ONCE A DAY. mY EERGY LEVEL IS LOW. KNEE RREPLACEMR\ENT WAS 0CT 31ST. I AM TAKINFG THERPY TWICE A WEEK. aNY COMMENTS APPRECIATED.