I would like to know if we can use nicotine patches for smoking cessation during the month of Ramadan.

Concise answer

These are the responses we acquired from the offices of the maraje’:

The office of the Grand Ayatullah Khamenei:

It isn't problematic.

The office of the Grand Ayatullah Sistani:

It isn't problematic.

The office of the Grand Ayatullah Safi Golpaygani:

Using patches of any sort is permissible, but all things that prevent water from reaching the skin must be removed when performing wudu or ghusl.