Nadezhda, Thank you for contacting Becton Dickinson and Company regarding our syringes and needles.  Am not sure what your source of information is to suggest the pouring of boiling water over our syringes came from.  I would suggest that you not do so as I cannot guarantee the outcome.  Our syringes and needles are designed and use materials that allow you to autoclave (steam sterilize) them.  However, this in a controlled situation and process over time and specific pressure. It is designed to kill bacteria and contaminants.  This is not the case here. Progesterone is a viscous solution that will require a certain amount of force to administer.  I would speak with my healthcare provider/professional for some technique suggestions to make the injections easier. Should you have additional questions please feel free to contact me directly.  Thank you again for your interest in BD> Sincerely, Brad Noe