For example, the BAN co-amoxiclav is assigned to preparations containing amoxicillin and clavulanic acid.
Most other pharmacopoeias simply refer to combination products by both ingredients in the preparation, in this example "amoxicillin with clavulanic acid".
The prefix of "co-" is used for many combination drugs, including opioid with paracetamol or aspirin analgesics (e.g., co-codamol, co-codaprin, co-dydramol, co-proxamol); the anti-diarrhoeal, non-analgesic mixture of diphenoxylate and atropine, co-phenotrope (trade name Lomotil); antibiotics (e.g., co-fluampicil and co-trimoxazole); antihypertensives (e.g., co-tenidone); diuretics (e.g., co-amilofruse and co-amilozide); gastrointestinal drugs (e.g., co-danthrusate); and anti-Parkinsonism agents such as co-careldopa, co-beneldopa, and co-cyprindiol.
Despite the importance of the BP, there appears to be little or no movement in the direction of changing these names.
In Australia, the Australian Approved Names are generally the same as BANs, but a few exceptions remain.