Lemsip max day & night cold & flu relief is a combination pack containing two types of capsules. Each day capsule (red/yellow) contains three active ingredients, paracetamol (500mg), phenylephrine (6.1mg) and caffeine (25mg). Each night capsule (red/blue) contains two active ingredients, paracetamol (500mg) and phenylephrine (6.1mg).

Paracetamol is a simple painkilling medicine used to relieve mild to moderate pain and fever. Despite its widespread use for over 100 years, we still don't fully understand how paracetamol works to relieve pain and reduce fever. However, it is now thought that it works by reducing the production of prostaglandins in the brain and spinal cord.