Advil is a brand name for ibuprofen, which is a nonsteroidal anti-inflammatory drug (NSAID) used to relieve pain, fever, and inflammation. According to Drug Patent Watch [1], Advil is not known to interact with antidepressants such as nortriptyline. However, it is always important to consult with a healthcare professional before taking any medication, especially if you are already taking other medications.

Nortriptyline is a tricyclic antidepressant used to treat depression and certain types of pain [2]. The NHS [2] notes that nortriptyline can interact with other medications, including NSAIDs, and may increase the risk of side effects such as bleeding or stomach ulcers. However, this does not necessarily mean that Advil will interact with nortriptyline, as every medication has its own unique interactions and side effects.

One potential side effect of nortriptyline listed by GoodRx [3] is excessive sweating. While Advil is not listed as a medication that can cause excessive sweating, it is always important to be aware of potential side effects and to talk to a healthcare professional if you experience any unusual symptoms while taking any medication.

In conclusion, based on the sources provided, there is no evidence to suggest that Advil will affect the dosage of nortriptyline or other antidepressants. However, it is important to consult with a healthcare professional before taking any medication, especially if you are already taking other medications. Additionally, it is important to be aware of potential interactions and side effects and to talk to a healthcare professional if you experience any unusual symptoms while taking any medication.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/ADVIL
[2] https://www.nhs.uk/medicines/nortriptyline/
[3] https://www.goodrx.com/drugs/side-effects/medications-cause-excessive-sweating-side-effect