I change mine every time, of course I only use 1 a day. I don't worry about getting a prescription. I can buy the Relion brand at Walmart without a prescription. I pay about $10 for 50. When I buy syringes for my dog, I don't need a prescription either.
> How often do you change the needle on your pens?
Nobody, anywhere recommends this but I only change the needle occasionally. Or when it starts to feel dull; or if it gets bent; or if the pen is used in a potentially dirty environment. Sometimes not until I toss the pen. I seldom use the alcohol swab too. I've never had an infection.
Hey, I just noticed: My NovoFine 30's have an expiration date! Now why would a needle have an expiration date? One of my boxes has an expiration date of 12.10.01 and the needles work like new. Obviously I'm saving way too much money using my needles judisciously.
I change it everytime. I've tried to use it more than once and sometimes the needle gets bent.