Differin and Erythromycin use-how long?

I was prescribed topical erythromycin and differin cream .1% in June 2008, for the treatment of adult acne. It worked perfectly and now my skin looks perfect. I have been using these 2 products for over a year now...when do I stop? Do I use them for the rest of my life? I don't have health insurance anymore, so I cannot ask my dermatologist. When I got the products, I thought I'd be back in 12 weeks to see him, and I never thought to ask about use limitations. However, I then lost my job and my insurance. So, I have just been using these items consistently because I am afraid if I do quit then the terrible, embarrassing acne will return.

Does anyone know what to do? Anyone else using these 2 products?

[dee12345633]

Hi my dermatologist prescribed the same products to me which, is what you are using the Differin gel and The Erythromycin topical solution, but that was 12years ago and my acne has came back and I don't have medical insurance, but I need those products so bad I'am gone to order them online. My acne has return and that was when I was twenty when I had insurance and my dermatologist prescribed those products to me and I need them again. So yes continue to use them as long as you can because the acne will return I'am a witness.