Smoking and chewing tobacco
Scholarly Ruling
According to a contemporary scholar, ʿAllāmah Aḥmad Dirham Ḥuriyah (may Allah have mercy on him):
“Its ruling is that it is permissible; however, it is preferable that the believer avoid it because it does not benefit. Rather, it harms him, even in the long run.”
Conclusion
Although technically permissible, it is recommended for a believer to avoid smoking and chewing tobacco due to its harmful effects and lack of benefit.
And Allah knows best!