Boiron Apis Mellifica 12C, 80 Pellets, Homeopathic Medicine for Insect Bites

I ordered 2 Apis 200ck but received one and one of something else. How do I get the other swapped for the correct one?

Is this the same as ivermectin

Should I use 200C or 30C for my son (age 8) who gets big welts with mosquito bites?

Does this work on hot spots on dogs?