NUCYNTA® (tapentadol) Tablets are immediate-release
film-coated tablets for oral administration. The chemical name is 3-[(1R,2R)-3-(dimethylamino)-1-ethyl-2-
methylpropyl]phenol monohydrochloride. The structural formula is:
The molecular weight of tapentadol HCl is 257.80, and the
molecular formula is C14H23NO·HCl. The n-octanol:water
partition coefficient log P value is 2.87. The pKa values are 9.34 and 10.45.
In addition to the active ingredient tapentadol HCl, tablets also contain the
following inactive ingredients: microcrystalline cellulose, lactose
monohydrate, croscarmellose sodium, povidone, magnesium stearate, and Opadry®
II, a proprietary film-coating mixture containing polyvinyl alcohol, titanium dioxide,
polyethylene glycol, talc, and aluminum lake coloring.
What are the possible side effects of tapentadol (Nucynta, Nucynta ER)?
Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficult breathing; swelling of your face, lips, tongue, or throat.
Call your doctor at once if you have a serious side effect such as:
- weak or shallow breathing, weak pulse, slow heartbeat;
- seizure (convulsions);
- severe drowsiness or dizziness;
- confusion, problems with speech or balance; or
- agitation, hallucinations, fever, fast heart rate, overactive reflexes, nausea, vomiting, diarrhea, loss of coordination,...
Read All Potential Side Effects and See Pictures of Nucynta »
Last reviewed on RxList: 11/20/2012
This monograph has been modified to include the generic and brand name in many instances.