Daydream - how often would you have used them, and does it matter? Did you get tummy cramps etc after using them? And did you need to stay at home for a while after using one, or are they pretty much instant? Sorry for all the questions! I just don't know of anyone that has had such terrible constipation in pregnancy before (or anyone that's admitted it!).
**WARNING** Could be TMI **

Enema worked within 30 mins & I was in the shower at home before we went to hospy, didnt get any tummy cramps from those. Used 2 in the last month of PG, one before I went to hospy & 2 within the month after I got home.
Suppositories didnt work at all for me. I was also give Lactulose to use for the entire last month of PG (because the constipation was really bad the entire pg I was only going once every 2-3 weeks, I have to add that for me regular was once a week). 10 Days after I left hospy I still hadnt "gone" & I rang the midwives at the hospy & they told me to take the lactulose for 3-5 days & use an enema or a suppository, and that if it happened again the next time to do that again, and I have been ok ever since & now find that I go every 1-3 days. The midwife also suggested to have a small bowl of sultana bran before bed if it seems to be slowing down & that seems to help too