Homeopathic hcg drops are banned by the FDA and are unavailable over-the-counter. You can purchase it online though. There are many homeopathic hcg brands available online at cheap price. One such effective brand is Official hcg diet drops.
I am not a fan of homeopathic hcg drops. And yes, over the counter sale of homeopathic hcg is banned by the FDA as said above. If you want to make an hcg purchase, I recommend Nuimage medical hcg drops.