So let's see what these ingredients really are:
Calms Forte:
Avena Sativa - Oat straw
Calcarea Phosphorica - Calcium phosphate
Chamomilla - Chamomile extract
Ferrum Phosphoricum - Iron phosphate
Humulus Lupulus - Extract of hops
Kali Phosphoricum - Potassium phosphate
Magnesia Phosphorica - Magnesium phosphate
Natrum Phosphoricum - Sodium phosphate
Passiflora - Passion flower extract
So a bunch of phosphate salts more commonly used for toothpaste and cement. Some weak extracts of flowers, aka tea. And extract of oats, aka weak porridge. And somehow it is supposed to help you sleep.
Fortunately at 3X and 4X dilutions, one drop is likely to contain so little of each that they are completely ineffective. Probably no more concentrated than dissolved salts and vegetable tannin in typical tap water. In fact, this compound could indeed BE tap water!