Hi there- mine is just OTC from local pharmacy its Ethical Nutrients SPM - I take mine with breakfast or lunch- no side effects. What I like is I have phoned them twice with questions and they were easy to talk to and informative. I think its a useful supplement.
I am also taking every now and then low dose Serrapeptase (Good Health Naturally -lowest dose and on empty stomach once a week - I joined that forum first to learn on) nightly 2mg melatonin compounded with PEA, sometimes bromelain and from today 0.25mg LDN compounded with PEA -my third time trying it. I never take a heap of supplements on the same day and I am careful with fillers-I prefer food based where possible. I may occasionally take fucoidan or sulforaphane, black seed oil, but , I prefer wholesome food, fresh veg juicing, low stress, nature walks etc. Reading on the biology of ANs it seems they are fibroblastic and inflammation is a growth factor. My stabbing ear pain turned out to be either TMJ -doing jaw exercises for OR as my husband suggested this thing shrinking!