What are the side effects of Potassium?

Users most often report hyperkalemia, stomach issues, heart palpitations, dizziness, seizures. Side effects came up 15 times across 152 reports.

User reports can't establish safety. PubMed lists 1,135 meta-analyses and 4,061 randomized trials. Talk to a doctor or pharmacist, especially if you take other medication.

Potassium side effects

Across 152 first-hand reports, people mentioned a side effect 15 times (about 10 per 100 reports). The most common: hyperkalemia, stomach issues, heart palpitations. User reports show what people notice — they can't tell you whether Potassium is safe for you.

Reported side effects

hyperkalemia4

stomach issues3

heart palpitations2

dizziness2

seizures1

heart problems1

fatal overdose1

cramps1

In their own words

“I tried magnesium , potassium , theanine. It does nothing for it.”

Didn't helpRead the discussion ↗

“but now I feel extra shitty but with some added dizziness and light headedness”

MixedRead the discussion ↗

Is Potassium safe? What the research covers

AResearch: Strong1,135 meta-analyses · 4,061 randomized trials on PubMed

Lancet · 2025

The effects of antidepressants on cardiometabolic and other physiological parameters: a systematic review and network meta-analysis

Conclusion: We found strong evidence that antidepressants differ markedly in their physiological effects, particularly for cardiometabolic parameters. Treatment guidelines should be updated to reflect differences in physiological risk, but choice of antidepressant should be made on an individual basis, considering clinical presentation and preferences of patients, carers, and clinicians.