Rules about prescription charges are set by the Department of Health. Here are some of the key points.
The current cost of a prescription is £8.80
Certain groups of people are entitled to free prescriptions. This includes:
Some other groups are eligible too.
For more information please see NHS Choices: information about prescription charges.
If you need regular medication but can't get free prescriptions, then it may be cheaper to buy a prepayment certificate. See NHS Choices: information about prepayment certificate