Hi and welcome to HCM Navidoxine contains pyrdoxine and meclozine, Pyrdoxine 25mg is safe in pregnancy can be given three times a day maximum. Meclozine is category B in pregnancy i e it has caused anomalies in animal fetus but no documented evidence of anomalies in humans. It is generally safe in pregnancy in recent studies. You can take these tablets for symptomatic relief during the pregnancy as long as these are needed. These are considered safe in pregnancy by many obstetricians. Try these methods to control nausea and vomiting 1.Eat little and often to prevent heartburn and nausea. An empty stomach can increase nausea. Keep blood sugars steady. Try eating small amounts of bland, dry food throughout the day. 2.avoid rich, spicy, acidic or fried foods, and eat less fat in general as they tend to irritate your stomach lining resulting in the production of more gastric acid 3.Do not lie down after a meal. If you move about a bit, you re less likely to throw up the food 4.Try drinking between meals if you re finding it hard to keep fluids down, and limit drinks during meals. Be sure to drink regularly 5.Have a spoon of diluted ginger juice mixed with honey every morning. Ginger is known to settle stomachs and help nausea. However, ginger should be used in moderation and with care – it doesn t help everyone. 6.If iron tablets are aggravating your nausea, discuss the alternatives with your doctor. For most of pregnant women nausea and vomiting will come down by 12 to 14 weeks, that is during second trimester. Regards Dr Santosh