Some of the online medical sites also allow you to type in all the medications you are taking and then they provide you with a list of possible interactions. Most of my dad’s doctors initially brushed off the possibility of a drug interaction causing his symptoms. When I researched it and found several of his meds could interact to cause his motor symptoms, my brother and I had to push him to bring it up with his doctors. Luckily, he went to see a doctor he hadn’t seen in a while and that doctor agreed it was likely a med interaction, changed his meds, and his symptoms are now gone.