Certainly here the price you pay relates to the cost of the actual medication, rather than a fixed prescription fee. So out of patent generic stuff like aspirin costs pence, whereas newer stuff like anti-virals can be very expensive. Make sure to get the generic name of your medication from your doctor, and yes if you are paying your stamp and have a SIP card remember to show that too so you get big discounts if a medication is actually prescribed for you,
The other thing I have found surprising is how little you actually need a prescription for in the first place!
BDP x