Just to add to AB's point here, it's worth noting that the original poster mentioned that he had asked directly if he was being refused a prescription because of his criminal record. So it seems the OP disclosed this information willingly himself.

Of course, it's highly likely that there is information in medical records that shows that somebody has previously been in prison - however the NHS should definitely not be treating you differently because of this, and I have to say, since leaving prison myself I have never experienced any issues with receiving NHS care (apart from the sad delays everyone expriences) or feeling like I was being treated differently than others.

You are quite right about the NHS and the PNC, but if you received healthcare in prison, that will form part of your medical record. If offence-related matters were discussed with a prison doctor, that might find its way into a person's medical notes. Similarly, if somone had been registered with a doctor at an SO-only prison, that tells its own story without reference to the PNC.

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If you are to punish a man retributively you must injure him. If you are to reform him you must improve him. And men are not improved by injuries. (George Bernard Shaw)

It is however against the law to have access to the Police National Computer without proper authority. The NHS does not have unfettered access. It needs to be justified and it is not routine. When you are convicted it doesn't automatically get flagged against your medical record. 

A Subject Access Request will reveal all the data the NHS holds on you. 

Unfortunately, it is not against the law to discrminate against someone because that person has a criminal record. So, unless the Parliamentary and Health Service Ombudsman upholds a complaint against them, you'd probably need to sue them to get what you want. I suspect they have better lawyers than you can afford.

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If you are to punish a man retributively you must injure him. If you are to reform him you must improve him. And men are not improved by injuries. (George Bernard Shaw)

No, she was pretty clear. She wouldn't prescribe drugs with an effect in impulse control to "someone like me". This was in response to my direct question of whether they were not  prescribing them due to my criminal record.

As to your other point, they're still trying to prescribe me SSRI type drugs for my "anxiety" (it's not anxiety, it's the physical symptoms of my Parkinson's starting to affect autonomous systems like respiration).

Strange how all the ones they recommend are the worst ones for causing irreversible impotence...one wonders if they are prescribing for control entirely and don't give a damn about my actual condition.

I wonder whether this is to do with your conviction, or just general concerns about the medication. For example, opioids used to be widely prescribed, as did SSRIs, but more recently the NHS is trying to reduce the amount of pills and focus on other forms of non pharmaceutical treatment, such as social prescribing.

I've just had a specialist nurse confirm they won't give me certain medications that have a reputation for impulse control side effects.

So called "dopamine agonists" are prescribed for Parkinson's disease, but have this reputation for causing such things as problem gambling, compulsive shopping, use of pornography, etc.

However, so does the main medication at higher levels, and though they haven't admitted THAT is capped for the same reason, they ARE refusing to increase it any further, citing "addiction concerns".

Is this legal? Personally as the victim it feels like torture. Unfortunately even though I didn't commit the offence, it comes under the "unforgivable" umbrella, and I do have a previous caution from 2010 for the same "sort" of images ("same sort" in the public's mind, though the 50 or so images found on my computer were nowhere near as "bad" as those I was convicted of watching on zoom in 2017...and no images of any sort were on any of my 20 plus devices)...

...sigh...

Why do I bother. No one cares and many would be quite happy for me to be tortured to the end of my days. You can do that if you like, but don't pretend it's justice. It's your hatred, nothing more.

Oh and by the way...for my original offence in 2010, the forensic psychologist prescribed 60mg Prozac, saying it helped reduce "inappropriate fantasies". Five years later I'm diagnosed with Parkinson's...which a Google search reveals is now linked to use of Prozac.

I never used to be paranoid...but then the nurse admitted they're denying me certain drugs, so it's not a case of "what if?" any more, it's just "How far will they go?"