When to 5 pharmacy's in my town(it's a small town) and they don't have any 21 guage needles. They only got 25guage. And I was spose to take the shot today and they won't have the needles till monday so I might have to delay the shot for 2 days. Would I be able to use a 25 guage??? And if so where would be the best place to inject??

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