Ampicillin Principen (discontinued) Azlocillin Dicloxacillin Dynapen (discontinued) Flucloxacillin Floxapen (Sold to European generics Actavis Group) Mezlocillin Mezlin (discontinued) Methicillin Staphcillin (discontinued) Nafcillin Unipen (discontinued) Oxacillin Prostaphlin (discontinued) Penicillin G Pentids (discontinued) Penicillin V Veetids (Pen-Vee-K) (discontinued) Piperacillin Pipracil (discontinued) Penicillin G Pfizerpen Temocillin Negaban (UK) (discontinued) Ticarcillin Ticar (discontinued) Penicillin combinations Amoxicillin/clavulanate Augmentin Both Amoxicillin/clavulanate and Ampicillin/sulbactam are effective against non-recurrent acute otitis media.[11] Amoxicillin/clavulanate is one of the few oral antibiotics effective against skin and soft tissue infections.