The most commonly used ones include ibuprofen, paracetamol and aspirin. But just because they're inexpensive and easily obtainable doesn't mean you needn't be careful when taking them. One may ...

Paracetamol does not work as effectively on muscle inflammation (eg. a twisted ankle, period pain, etc) as aspirin and ibuprofen, both of which are classed as non-steroidal anti-inflammatory drugs ...