I disagree that it is not a GPs job to give you guidance on medications! They are the ones licensed to prescribe medications, therefore they should be giving at least some guidance, especially on things like Dovobet which can cause long term effects. I DO read the notes that come with medications, however I never read anything about using the cream for four weeks and then having a break, and my doctor never said anything of the kind (neither did the pharmacist)! In addition, I went back to the doctor a few months after (of my own accord - NOT because they asked to see me for a review!) and asked about further treatment and they told that they had given me everything available.
Yes, you should understand the medications you are using, however some of the responsibility should belong to the healthcare professionals prescribing them.