When treating acne, due to the need to treat deep down at basal skin layers, it can often take 3 months for any improvement to be seen. So I would try to see how it goes for another month. When acne is very persistant then finding the right treatment does take a lot of patience, and once it does start to work you will need to continue for some time.
have a look at this website for more info on Nicomide:
http://www.drugs.com/PDR/Nicomide_Tablets.html
Regards
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