Hi, My husband, age 65, took two Zpacks back to back starting June 18 prescribed for sinus infection and other (eye, possibly ear, moving toward bronchitis) infections. He has yet to recover his stamina. Fever is gone and appetite gradually is returning, but still he is exhausted. We saw our GP yesterday, who seemed to see no cause for concern. He is eating yogurt and/or taking probiotics. Is the exhaustion related to Zpacks? Prolonged infection(s)? Thank you. Concerned Wife