clarithromycin Hi, I rarely get outbreaks of spots however the past month I have been getting painful, large, under the skin spots on my chin. I have been to the doctors the past few weeks and have tried different antibiotics, however the acne is still there and new spots are appearing. I have been prescribed Clarithromycin. My self-confidence is really low at the moment. Will Clarithromycin work? How long will it take to notice improvement? So far I have taken 3 tablets, each 500mg (I have 28 tablets altogether). When should I go back to the doctors if I don t see any improvement? What are the next steps likely to be - is there anything stronger?