acne
"Developed flu like symptoms the evening after I took first and only dose. Soon after developed acute hives and ill feeling for several months then additionally turned jaundice. Went to GI and connected it to the minocycline.   Took 3-4 months to monitor and bring liver levels back to normal (they were elevated 16 x the norm).  Had similar situation 5 years back but hadn't connected it to the minocycline at that time.  Had used the minocycline for a few months then. Must have developed severe reaction now to cause so much trouble with just one dose. Red Cross won't accept my blood donations now.  Bad stuff. Don't recommend it to anyone"