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Acetaminophen and pentazocine is a prescription medication that is taken to treat mild-to-moderate pain. It works by binding to certain pain receptors in the body. Potential side effects of the drug may include nausea, drowsiness, and constipation. As an opioid narcotic and controlled substance, this medication does have abuse potential.

What Is Acetaminophen and Pentazocine?

Acetaminophen and pentazocine (Talacen®) is a prescription medication approved for the relief of mild-to-moderate pain. It contains a combination of pentazocine, an opioid narcotic pain medication, with acetaminophen (Tylenol®), a non-narcotic pain medication.
Because it contains pentazocine, acetaminophen and pentazocine has the potential for abuse and is considered a controlled substance. This means there are strict laws and regulations controlling its possession and use. Acetaminophen and pentazocine is classified as a Schedule IV controlled substance, which has less abuse potential than Schedule II (i.e., morphine) and III (i.e., hydrocodone/APAP) controlled substances.  
Pentazocine is also available in combination with naloxone (Narcan®) as the brand-name product Talwin® Nx. Talwin Nx comes as a tablet, and is taken by mouth. Pentazocine is also available alone as an injectable medication, Talwin® (pentazocine lactate). 
(Click What Is Acetaminophen and Pentazocine Used For? for more information, including possible off-label uses.)
Written by/reviewed by:
Last reviewed by: Kristi Monson, PharmD;
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