Levonorgestrel is a type of intra-uterine device which contains the hormone progesterone. These devices are used as a form of reversible birth control.

Two days.

Alesse and Nordette tablets

There are no known drug interactions between paroxetine, paracetamol (a.k.a. acetaminophen), and the levonorgestrel morning after pill.

Allergy to copper or Wilson's disease are contraindications to the copper IUD that don't apply to the levonorgestrel IUD.

In addition, severe anemia is a contraindication for the copper IUD, but may be an indication for the levonorgestrel IUD, particularly if the anemia is exacerbated by heavy periods.