16 Advantage card points. Lemsip Max All in One Lemon Powder is for the symptomatic relief of colds & flu, including chesty coughs. Per sachet: Paracetamol 500mg, Phenylephrine Hydrochloride 12.2mg, Guaifenesin 200mg. See details below. Always read the label. FREE Delivery on orders over 45 GBP.