Nurofen Express 400mg liquid capsules provide extra strength in a single liquid filled capsule. The capsules rapidly absorbed to work at the site of pain. 400mg Liquid Capsules. These extra strength capsules provide effective relief from pain, inflammation & high temperatures. Fast, effective relief from: Headaches. back-ache. Cold & flu symptoms. Period pain. Muscular pain. Feverishness. Dental pain. Rheumatic pain. Non-serious arthritis pain. Migraine. Neuralgia.