The difference between white and red Merlin is the difference in concentration, size and feeding device, the active ingredients inside are the same. White Merlin is ibuprofen suspension drops, 15ml bottle, each 15mL contains 0.6g of ibuprofen, using a dropper to feed. The red Merlin is ibuprofen suspension in two sizes, a 30mL bottle and a 100mL bottle, both containing 2g of ibuprofen per 100mL. The concentration of the red suspension is the same for both sizes, and the red Merlin is fed with a small measuring cup. For example, a 3-year-old child weighing 15kg uses white ibuprofen suspension drops with a recommended dose of two droppers (2.5mL) and red ibuprofen suspension with a dose of 5mL, both of which actually contain 100mg of ibuprofen. ibuprofen is not recommended for babies under 6 months of age, and the white Merlin suspension drops package only has recommended doses for ages 6 months to 3 years; red Merlin The package of mixed suspension has only the recommended dose for ages 1-12 years. Because of the different feeding devices, the white Merlin drops use a dropper, which makes it easier to give medication to infants and children over 6 months of age. The red Merlin suspension is also available for feeding to small children, and the dosage requires consultation with a doctor. Whether the medicine is fed by dropper or measuring cup, the residual medication on the wall is recommended that parents can add some warm boiled water and feed it to the baby together.