Well I do consider it to be bad advice. For others and for yourself.
I'm not offering advice and have been quite particular about that. Describing (some of) what I'm doing or have done - particularly in the vague terms I've chosen to use - cannot be construed as advice to others and I think it a little disingenuous to say it does. Why do we even chat online if not to talk about and share experiences or describe the things we think or do? Given that, I think it reasonable to credit other adults with the capacity to take at least
some responsibility for their own actions, given the panoply of information on attempted treatments for long covid that already exists online. For me to censor myself entirely out of fear that others lack the capacity to think and make choices for themselves and would recklessly copy my actions would be an absurd overreaction, particularly in that context.
I've met a few doctors that were well keen on self prescribing. One of them took so many pills that they would rattle like a maraca when going downstairs
That's depressing. Different trusts and CCGs have different rules on this, and it can also vary depending on the healthcare setting (hospitals vs GP surgeries etc). Usually you can only self-prescribe for certain specific emergencies, and these would appear on your medical record and your GP would know anyway; in other circumstances it's possible to create private prescriptions, but to say it's frowned upon is an understatement, and you really just wouldn't. Plus any decent pharmacist would likely clock drug-seeking behaviour from a medic, and that's also not a situation you'd want to be caught in. Which is not to say there aren't some ways around this so technically yes, it can be possible.
But honestly, you'd make life easier to just go to your own GP and come up with a bunch of sound reasons why you might need to be prescribed x, y or z, assuming you understand the prescribing criteria well (many doctors actually know fairly little about drug pharmacology), and they'll likely agree. And even with something as speculative as treating long covid, assuming your GP or specialist is reasonable and open to logic, they might agree off-label use (depending on NICE criteria).
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None of this applies to me though, and I'm not advocating anyone do anything simply because I explained that I
may trial some treatments on myself at some point as a last resort if things don't improve. Honestly, part of the reason I even mentioned it was just venting frustration, moreso (sorry for being human), though drugs like colchicine (which has been discussed as part of a long-covid treatment regime for its specific anti-inflammatory potential) I already have and use for a different condition, so it wouldn't be difficult to access and trial.