Hi Shrimp,
The rules on free prescriptions are made by the NHS and are as follows regarding Universal Credit....
"While you're waiting on your Universal Credit decision -
Until your first assessment period is complete, Universal Credit doesn't entitle you to help with NHS costs.
If you need to pay for any NHS charges, for example, prescriptions or dental treatment, make sure you get a receipt and ask how you can claim a refund.
If you pay for a prescription, ask for a refund receipt called an FP57 when you pay - you can't get one later."
The NHS provide an online Help with Health Costs checker ( link below )
www.nhsbsa.nhs.uk/check-if-youre-eligible-help David