Has anyone heard of talwin (pentazocine) nx tablets- medication and the effects of it?

Talwin (pentazocine) -Pentazicine: Talwin or generic name pentazocine is narcotic pain medicine not used much these days, it also comes in combination with Naloxone to prevent the misuse of the narcotic ingredient.It can cause confusion, hallucinations, weak or shalow breathing, chest pain, seizures, cold clammy skin, tromors, severe axiety, headaches, constipation or diarrhea, blurred vision, ringing in ears, nausea vomiting and loss of appeti.