If you must "shoot up" with your salt, then can't help ya. Meanwhile, here's the reality when compared to NaCl:
"Orally, potassium chloride is toxic in excess; the LD[SIZE=-1]50[/SIZE] is around 2.5 g/kg (meaning that a lethal dose for 50% of people weighing 75 kg (165 lb) is about 190 g (6.7 ounces)). However, this is not far from oral toxicity of sodium chloride (table salt), of 3.75 g/kg, thus potassium chloride is harmless for alimentation (and even good for health, see previous paragraph). But intravenously, without the step of digestive absorption, this is reduced to just over 30 mg/kg.[14]" -- http://en.wikipedia.org/wiki/Potassium_chloride
Sodium chloride, when injected in similar large doses can also be used to kill: