Misoprostol for cervical priming is a recognised use, but it is not licenced for this indication.
Practitioners may consider sublingual or vaginal cervical preparation based on individual patient circumstance and wishes.
Prior to administration, explain to the woman that cervical priming
- Reduces the risk of incomplete procedure
- Makes dilation easier
- May cause bleeding and pain before the procedure
Sublingual administration
Misoprostol 400 micrograms (2 x 200 micrograms tablets) in a single dose should be placed in the buccal pouch and allowed to dissolve over a 15 minute period. If not dissolved within this timeframe it may be swallowed with small sip of water.
It is suggested that this is given 2-3hours prior to the procedure to ensure sufficient cervical priming. It can however be noted that where given by sub-lingual route, it can be effective for cervical priming if given at least 1 hour before the procedure.
Sublingual misoprostol can cause more gastrointestinal side effects than vaginal misoprostol, and may be less acceptable for women.
Vaginal administration
Misoprostol 400micrograms (2 x 200 micrograms tablets) in a single dose should be placed in the posterior fornix of the cervix and allowed to dissolve. Patient should therefore be advised to lie in semi recumbent position for 30 minutes post administration.
It is suggested that vaginal misoprostol is given approximately 3 hours prior to procedure as it takes longer to achieve sufficient priming of the cervix for lower dilation force. However, this is associated with more time with preoperative pain and bleeding than the sublingual route.