There are no percentages with the common side effects. There aren’t any percentage on the rare side effects.
Everyone who are on the same medication can explain different sides effect they are experiencing from the medication. One person may not notice anything major with side effects, when another person experienced a lot of bad side effects. Another one medication experience moderate, side effects, but still manages taking the med.
Since your are on three meds, how many of the side effects are the same on all 3. Those side effects you are more likely of you experiencing. I’m on five meds 3x a day most of them drowsy, tiredness p, unbalanced and many a couple of other side effects