There are people who can help with this planning. Suppose ibogaine or iboga root falls into your hands. This is not a good situation for carelessness. Things feel a lot less casual when one is looking down at one's cold body. Get excellent advice.
Some people report difficulty breathing when well into the trip.
People's reactions to ibogaine vary. Some experience only mild psychological effects, and some have severe, prolonged reactions. Again, good can come out of a difficult experience with the right support available, and an awkward situation can be avoided by, for example, not expecting to return to work three days later. A lot of your experience depends on what you believe about yourself, sometimes without realizing it, and it can be a good opportunity to learn what you did not previously realize. Many people read other people's trips and think they are wonderful, and expect to have a similar trip themselves.