 [ Symptoms ] doxycycline potential liver damage i do not drink smoke or have any vice i get annual exams and my liver always checks good about a week before my annual exam this year i had just completed a two therapy of doxycycline and my liver values alt and ast were out of range alt was 6 points out of range and ast was 9 points out of range  is this possible stress from the antibiotic cycle are these values high or demonstrating damage to be concerned about   thank you [ Disease ] any anti biotic used long term can cause liver damage