I've been prescribed Duac 5% today by my GP for acne on my chin, went to get it from the pharmacy and turns out nowhere is stocking it anymore due to a manufacturing issue. I've rang several pharmacies now and they've told me that the only one available is the weaker Duac 3% gel. I got my hopes up as a lot of the reviews seem so positive, but I'm wondering whether people are reviewing the 3% or 5% gel - and whether the 3% gel still works or not?