You must be getting your info from a medical doctor who knows zero about homeopathy! Lol Kali Phosphoricum pellets have been working for me within 3 minutes for cold sensitivity/tingling. No lingering side effects. Have only had to use them a couple of times. No adverse effects either. My oncologist also said no to ozone therapy which is an oxidizing treatment that works hand in hand with chemotherapy. I have read books on it, with studies included, written by Dr Frank Schallenberger, MD & HMD. My CA19-9 is drastically declining weekly and I truly believe it’s because of the ozone therapy treatments along with the chemo. My oncologist says that ozone therapy is not FDA approved (and he knows nothing about it). Well lots of harmful things doctors prescribe ARE FDA approved!!! Oxygen in your bloodstream kills cancer cells! I read & do tons of research. I do know that much. If you don’t do your own research & advocate for yourself you may end up paying the price. I am just sharing what is working for me. Everyone honestly should do what they feel is right for themselves. Best wishes & good luck to you!