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What if I have difficulty withdrawing sufficient liquid from the vial: Do not shake the vial before withdrawal but let the liquid settle to the bottom of the vial. Ensure the vial is in an upright, slightly inclined position. Slowly withdraw the plunger and wait for the liquid to appear in the syringe barrel. Continue to withdraw slowly to completely empty the vial and the filter needle.
What if I cannot remove all the air bubbles from the liquid: It is important that the liquid is air free. However, tiny air bubbles that are attached to the stopper usually do not detach from the stopper during the injection and therefore do not affect the dose volume.
