Is your prescription for Promethazine?
Both promethazine And cyclizine are 1st line treatment for hyperemesis.
None of the medicines can be tested in formal trials on pregnant women as it would be unethical, however from studies of women and babies after birth, there are no identified significant risks to baby and outcomes for mum and baby are good.
I was on Promethazine for the entire pregnancy last time and have a very healthy 4 year old asleep next to me right now
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I was more anxious about it first time and refused to try meds until 11 weeks. By which time I had been off work for 5 weeks, had intermittent total food aversion and was being sick 8 -15 times a day. I found it helped me pretty quickly, though I did need it throughout, some don't
This time the nausea started around 4..5-5 weeks.
By 7 weeks (36 hrs on 150mls lemonade only) and feeling dreadful all the time, I gave in and started Promethazine.
I definitely think Taking it earlier has stopped it getting as bad