Yes you can.
Generally, CTB with just SN is considered controversial.
You certainly make your probability of success lower than if you had, for example, AE.
But it's very hard for me to say how much you reduce the chance.
It depends on other factors.
If you take care of all the other things (fasting, clean SN, etc.) you will probably succeed.
But remember that CTB is a thin line and the situation may turn out differently.
SN is the most important (logical).
AE highly recommended.
All other products are just add-ons that can make your journey to the other side a little more enjoyable.
But these other additional products can also increase your chance of success. For example, thanks to Benzo you will panic less and reduce the chance that you will do something inappropriate. An individual matter.
You definitely need to prepare for vomiting.
Of course, even after taking AE you can vomit, but without AE the probability increases.
Mentally prepare yourself.
Two extra glasses with SN is also a good idea.
You can also fast a little longer.
Good luck