u say he’s been taking it for 6 weeks? it’s time to check his cholesterol, liver panel, and his CPK (cpk important to check, this is to check for his muscle enzymes). the pins and needle feeling possibly could be from zocor but i don’t know abt. the itching. usually when someone is allergic to any meds..the rash, redness usually shows up rather quickly..like a day or 2 of taking the meds. if it’s bothersome, stop the zocor….or he can cut it in half and see what happens. he shouldn’t postpone the blood test thou.