Can Salt-Substitutes be dangerous?

I've been using Mortons Low-Salt, which is a combination of sodium and potassium chloride. I dont have high-blood pressure, I decided to use it because I like my food really salty and felt I was consuming too much sodium.

However, I've done a little research on potassium chloride and it appears its not exactly harmless. I've been experiencing some strange sensations in the heart area, plus a feeling sometimes of irregular heartbeat/heart beating too fast or hard.

It could all be a coincidence, or just my imagination. But I do eat
ALOT of the sodium/potassium chloride combo. ALOT.

Can dietary potassium chloride cause bad symptoms?

Does it make a difference whether something is eaten or directly injected? we breathe air but injecting air into a vein can kill you.

i believe injesting too much potassium chloride is something that a person with kidney problems shouldn't do

Of course it is also plentiful in plant foods.
The dose is the poison, and of course the route of administration.
Breathe air, fine. Inject air, perhaps death.

With kidney disease, patients should obey the intake instructions of their medical advisors strictly.

Yes, it makes a difference. Lethal dose (injection) .1 grams/ kilogram - ingestion .5 grams to 3 grams/kilogram. 7 grams (21 of solution (31%) injected will kill a 70 kg person. People with kidney problems will have a smaller lethal dose.

KCL is what they use for lethal injection. You'd have to check this, but I think 25 grams could be a lethal dose. That's a little less than an ounce.