The distributor of Nurofen is accused of misleading the public about its specific pain products.
The Commerce Commission has laid 10 charges under the Fair Trading Act against the Reckitt Benckiser New Zealand (RBNZ), which distributes and markets products such as Nurofen, Dettol and Mortein.
The commission said RBNZ has co-operated with the investigation and noted it intends to plead guilty to the charges.
The regulator alleges that the packaging and promotion of four different types of pain-specific products - Nurofen Migrane Pain, Nurofen Tension Headache, Nurofen Period Pain and Nurofen Back Pain - were misleading.
The commission also alleges that the advertisment of these products on RBNZ's website www.nurofen.co.nz was likely to mislead or deceive consumers.