Personal experience suggests tolerance development is less affected than metabolism (presumably because peak caffeine levels aren’t affected, although I don’t have studied backing that up), which means you’ll develop a tolerance to caffeine faster, as well.
That study is testing the effect of tobacco use, not pure nicotine.
EDIT—why is this downvoted? The linked study does not test your claim. Tobacco smoking is a CYP1A2 inducer so it will increase caffeine metabolism, but I am not aware of any studies demonstrating that the nicotine is responsible for this. Tobacco smoke contains PAHs and PAHs are known CYP1A2 inducers:
https://www.ncbi.nlm.nih.gov/pubmed/25911656
If you use caffeine: No. Nicotine increases your metabolism of caffeine, meaning you need higher doses of caffeine to achieve the same effect. http://www.ncbi.nlm.nih.gov/pubmed/9022872
Personal experience suggests tolerance development is less affected than metabolism (presumably because peak caffeine levels aren’t affected, although I don’t have studied backing that up), which means you’ll develop a tolerance to caffeine faster, as well.
That study is testing the effect of tobacco use, not pure nicotine.
EDIT—why is this downvoted? The linked study does not test your claim. Tobacco smoking is a CYP1A2 inducer so it will increase caffeine metabolism, but I am not aware of any studies demonstrating that the nicotine is responsible for this. Tobacco smoke contains PAHs and PAHs are known CYP1A2 inducers: https://www.ncbi.nlm.nih.gov/pubmed/25911656