BANs are unique in that names are assigned for combination preparations as well as single-drug preparations. 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 other commonly encountered opioid combination is the anti-diarrhoeal, non-analgesic mixture of diphenoxylate and atropine, Co-phenotrope (a.k.a. Lomotil). Also antibiotics (e.g., Co-fluampicil and Co-trimoxazole), drugs to lower blood pressure (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 others (e.g., Co-cyprindiol).