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.