Tetracyclines can cause a yellow discoloration mainly by binding to calcium in bones and teeth . This is usually only seen in children one reason why tetracyclines are not typically prescribed to children under 9 or pregnant women unless necessary and prolonged use in adults . I was on doxycycline for years without issues . I ' m sure if you are only going to be on mino for a few months you have nothing to worry about . Source in pharmacy school <| sep |> I didnt expect any up votes , let alone a friendly comment ! No , I haven ' t tried it . What put me off from trying it was the little girl with her overly sweet smile hah . But meh , it actually looks like a really nice show and I ' ll give it a go despite it being out of my comfort zone Thanks for the tip !