This may be of interest to gents of a certain age, has certainly done wonders for me...
Tamsulosin While not its primary FDA-approved indication, it is sometimes used off-label to manage sexual or urinary issues related to "delay" or dysfunction.
It's not really of interest as there's a snowball's chance in hell of a GP prescribing tamsulosin for this unlicensed use, especially as others have mentioned, there is the risk of falling over or worse because of this medication, potentially making the GP liable for malpractice, especially
as there is a medicine approved by the UK's MHRA medicine regulator for treating the condition (Dapoxetine), as well as other solutions which a GP will be expected to explore first.
The only way someone is likely to get Tamsulosin for premature ejaculation are if other interventions have been explored and failed or deemed inappropriate, the patient has been assessed by a specialist in the field and the risks of taking Tamsulosin on an unlicensed basis have been discussed with the patient.
As has been said time and time again in these forums, it's best to take medical and healthcare advice from the professionals in the field. Don't be shy to ask or visit, you're not the first, you won't be the last, and they're legally and professionally obliged to keep what you discuss confidential.