I suffered terrible vomiting in my first trimester.
I was started on cyclizine which did nothing and eventually was moved onto Promethazine that really started to help.
I've been taking 2 x 25g daily of promethazine for 3 weeks now and over the last couple of days I'm reverting back to the bad days.
Is it possible I've built up a tolerance that quick, or is it more likely I'm just have a bad wave?