NHS in the UK is the same as the HSE in Ireland, the public health board. Figuratively tell your GP to **** off, he doesn't need to know that you are taking finasteride the same way my GP doesn't need to know and if he some how found out I'd tell him it's none of his business, if he had a problem I'd get a copy of my medical history and find a new GP. You mention that you want to get monitored, Kirby, pal, it costs €35 for blood tests in the walk in clinic I went too (excluding STI tests) you could easily find a clinic, tell them you are on finasteride and you would like to get a full blood count, thyroid, liver etc.