Amoxypen LA 150 mg/ml Suspension for injection Presentation Amoxypen LA is an off-white, sterile, non-aqueous suspension for injection containing 150 mg amoxicillin (as Amoxicillin Trihydrate PhEur) per ml. Antioxidant preservatives per ml: Butylated hydroxytoluene 0.08 mg and Butylated hydroxyanisole 0.08 mg .