I was on it for a while and it didn't do much for me... Cleared me up a little bit. I had better results with Clindamycin but that also wasn't very effective as I built up a resistance to it after about a year. Same with doxycycline but that didn't work for me at all. It made me dizzy and my face got worse! That's the problem with antibiotics, most people build up an immunity to them. But they still do keep me controlled a bit and it's the best thing I've found without using accutane. Also, everyone reacts differently. I would continue your tetracycline for at least a month and at least give it a chance. Best of luck.