I think the answer is very dependant on what state of mind comes out when taking a remedy.
For instance, supposing you are taking Star of Bethlehem to deal with trauma, and that gives way to exhaustion, then unless you have access to Olive, you will suddenly feel very tired. Then you take Olive and that gives way to feelings of guilt, then unless you have access to Pine, it can be very tormenting.
The problem for many is the lack of access to all remedies due to money, logistics or circumstances. In such as case, reducing the amount taken can help you deal with the results.
Rescue Cream can sometimes produce a rash. This is due to the body flushing out toxins.
Remember, you can't having something manifest itself unless it's already there.