The purpose of this study is to assess the bioequivalence between two oral nicotine sublingual tablets, 2 mg and 4 mg.

The study is a single-dose, randomized, 2 x two-way cross-over study. The investigational products will be given as single doses at separate visits. Periods without Nicotine Replacement Therapy (NRT), lasting for at least 36 hours, will separate treatment visits. Blood will be sampled at each treatment visit for pharmacokinetic analyses pre-dose, and at 5, 10, 15, 20, 30, and 45 minutes, as well as 1, 1.25, 1.5, 2, 3, 4, 6, 8, and 10 hours after start of product administration. The time until complete product dissolution will be recorded. Subjects will also be monitored to capture any adverse events that may occur. The trial is open in the sense that subjects and study personnel will be aware of what product is administered at a given visit. However, the treatment labels will not be known by the people performing bioanalysis or analyzing pharmacokinetic data.

Inclusion Criteria:

• Healthy subjects, smoking at least 10 cigarettes daily during at least one year preceding inclusion and Body Mass Index (BMI) between 17.5 and 30.0 kg/m2.
• Female participants of child-bearing potential are required to use a medically acceptable means of birth control.
• A personally signed and dated informed consent document, indicating that the subject has been informed of all pertinent aspects of the study.

Exclusion Criteria:

• Pregnancy, lactation or intended pregnancy.
• Treatment with an investigational product or donation or loss of blood within 3 months preceding the first dose of study medication.