Nalbuphine Hydrochloride 10 mg/mL Ampules 1 mL x 10/Pack (Rx)Nalbuphine Hydrochloride Injection 10 mg mL (Pfizer) Nalbuphine hydrochloride is a synthetic opioid analgesic (an agonistantagonist) and a prescription only medication. This product is supplied as a sterile, preservative free aqueous solution in 1 mL glass ampules, each containing 10 mg of nalbuphine (label strength 10 mg mL). (Pfizer distributes it via Hospira; one common brand name was Nubain.) It is intended for parenteral use only (intravenous,