I get annoyed too as I know my health and what works for me, I have chronic conditions and I take what I need, no more, if I go in and ask for something stronger than my day to day medication, like morphine for example (had both oramorph and tablet form in the past), it's because I can't cope without it. Passing kidney stones is fecking awful, passing them on top of living with chronic pain is a nightmare, but I prefer not to go to hospital to be medicated, so if I ask for pain medication, it's because I need it, not because I want to get high or am addicted.
Same goes if I ask for something to help with sleep, as I will only go when I've tried everything else already. Being in pain and losing sleep is the worst combination ever, sleep loss is a known trigger for my mental health issues, and if I can't manage those issues, I'd rather take a sleeping tablet than have a psychotic break.
I had a great doctor when I moved away from this area for a year, she sat with me and we discussed my needs and what we could do to manage pain, and when I needed more help, she was happy to prescribe me with antibiotics to take on holiday in case I needed them, and some painkillers stronger than my usual to take for the flight and travelling, and for the bouts of renal spasms which I thought might indicate a stone coming through. I am on long term pain medication, but that only manages the day to day pain, when I get infections or a flare I get masses of breakthrough pain. I use other methods, like heat pad, TENS, warm water in bath/hot tub/pool to try and manage, and if nothing works, then I will go to see GP. I don't think I am being unreasonable, knowing what works and what doesn't is just part of day to day living with chronic conditions.
I have access to a BNF even, so I know contraindications and side effects of most medications, so I can make an informed choice.