Single remedies are best when the picture of the person’s state of health fits the remedy’s description. For example, Mike, John and Sarah have all seen me regarding their allergies however, they all take different remedies as the allergy symptoms are very different within each.
Mixed remedies use a combination of remedies known well for their ability to treat particular ailments. For example, a combination homeaopathic spray available at health food stores will contain allium cepa, Euphrasia, Kali bich and Pulsatilla, all known acute sinus remedies.
The main difference being is that Mike, John and Sarah are working on their susceptibility to their allergies, where the mixed form may just provide temporary relief, similar to other forms of medications. Again this relates to the chronic and acute treatment protocall.