How do you mix and/or can you mix several homeopathic remedies together?

Water+water=water: Since, technically speaking, homeopathic solutions are water with the "molecular memory" of some substance, they are actually just water. There is nothing in them but water. So if you are mixing water and water, i would say you would get water.

Complex homeopathy: Some companies mix homeopathic remedies together and call it "complex homeopathy." sometimes the complexes help. However, for more focused (and more thorough) treatment, classical (single remedy) homeopathy works much better. The case has to be taken carefully and prescribed for by an experienced homeopath. The remedies are not "just water" as my colleague asserts.