I am a type 2 diabetic on two types of
Side effect of insulin injection
I understand your concern. Painful cramps and spasms after an insulin injection are not uncommon in people who also have diabetic neuropathy (nerve damage). The exact reason for this is not yet known, however, studies have shown a drastic drop in potassium levels in people 30 minutes after an insulin injection, which explains the painful cramps.
Taking over the counter potassium tablets prior to an insulin injection has proven very effective in alleviating the cramps, reducing and even eliminating their occurrence. I recommend you talk to your doctor before taking these supplements.
I hope this answers your query. Let me know if I can assist you further.