The most common side effects include dry mouth, sedation, constipation, and increased appetite. An occasional side effect is a rapid or irregular heartbeat. Alcohol may exacerbate some of its side effects and should be avoided.
However, the incidence of side effects with nortriptyline is lower than with the first-generation tricyclics (e.g., imipramine (Tofranil), amitriptyline (Elavil)).
A study with men has found that treatment with nortriptyline is associated with higher risk of suicidal ideation compared to escitalopram.[9]
Per Wiki. Very typical side effects for tricyclic antidepressants.