Morning sickness my arse. I had the 4:30a-3:00p and 7:00p-2:00a sickness; nausea, queasiness, and actual projectile vomiting. I tried Sea-Bands, ginger, lemon drops, tea, the raw potato thing, and various other "remedies".
Some made a slight dent, but none made me 100% better.
thing that made a difference was B-6. It was extremely effective. I took it in a combination tablet, sold as a prescription in Canada, called Diclectin. Diclectin has a time-release mixture of doxylamine succinate (the antihistamine in Unisom SleepTabs, sold OTC in the US) and vitamin B-6.
Since Diclectin (or Bendectin) is not sold in the U.S. (even though it was proven safe by the FDA, our litigious tendencies caused the manufacturer to pull it off the market in 1983), your coworker will have to either get a script from her doctor, drive to Canada and have a Canadian physician rewrite it (not as difficult as it sounds), or she can take the script to a compounding pharmacy and have them fill it. Alternatively, she could just buy some Unisom SleepTabs, some B-6, and talk to a knowledgeable practitioner about how to take them in combination.