Yeah, when you mix them together 2drops of each one is perfectly fine. It's homeopathic..the energy is contained in the drops and energy is energy! I guess if you are just taking one mother 4 drops is a fine idea - but I always mix (then there are lots of drops in the bottle - with 1 tsp of brandy and fresh water too).
Thanks for reminding me, Cielo! I brought my mothers so I could make a new potion for myself...