A member asked:

How can we aspirate before injection for drugs which are colorful such as b12 that is pure red?

A doctor has provided 1 answer

Dr. Martin Rubenstein answered

Not to worry.: When you pull back on the syringe it is easy to distinguish B12, which is red but is translucent (you can see through it) from blood which is darker and opaque.

Answered 10/6/2014

3.7k views

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A member asked:

How can we aspirate before injection for drugs which are colorful such as b12 that is pure red?

A doctor has provided 1 answer

Dr. Martin Rubenstein answered

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