You can take paracetamol for:
mild to moderate pain, for example backache, headache, migraine, muscle strains, period pain, toothache and aches and pains due to colds and flu
fever (high temperature)
osteoarthritis and other painful, non-inflammatory conditions.
The dose of paracetamol for adults is:
one or two 500mg tablets every four to six hours
up to a maximum of 8 tablets in 24 hours.
Alternatively:
one or two 665mg tablets every eight hours
up to a maximum of six tablets in 24 hours.
It’s dangerous to take more than eight 500mg tablets in 24 hours as you may damage your liver, which may be irreversible and fatal.