Hi Georgette
Ranitidne is usually used for gastric / duodenal ulcers and for reflux. It is safe to use when pregnant

Mebeverine is a category B2 (Drugs which have been taken by only a limited number of pregnant women and women of childbearing age without an increase in the frequency of malformation or other direct or indirect harmful effects on the foetus having being observed. Studies in animals are inadequate or lacking but available data shows no evidence of any increased occurrence of foetal damage.) So should be safe to use after discussing it with your doctor.