i just searched all those pharma products in google followed by search terms
side effects acne
and all of them list acne as a possible side effect.
did the same for potassium and i'm getting the message that potassium deficiency causes acne too. so i suspect the potassium has been prescribed to counter the possible pharma side effects.
turns out fish oil is also touted as an acne treatment.
i suspect that your pharma load is too high compared to the potassium and fish oil intake.
how much potassium (mg) in the K-tab? you need 3500 per day at least from diet and supplements combined.
"Prednisone causes the body to retain sodium (salt) and lose potassium."
"Fluoxetine Inhibits Potassium Transport Pathways"
may i ask what your selection of pharma products are targeting specifically? you might be able to nail down some supplements that can help with no or at least fewer side effects.
my approach: no meds so far - just nutrient-dense anti-inflammatory whole foods, and supplements where needed
info: www.whfoods.com, www.nutritiondata.com