Medicines in pregnancy: How to Check Before Taking or Stopping One

A medicine review during pregnancy considers both treatment effects and what could happen if a health condition becomes less controlled. The decision depends on the exact medicine, how it is used and the stage of pregnancy. It is worth revisiting the plan when treatment changes, not only at the first appointment.

Make one complete list

Bring the name, strength, dose and frequency of every product you use. Include occasional painkillers, inhalers, creams, vitamins and herbal preparations as well as regular prescriptions. A photograph of the packaging helps when different brands contain the same ingredient.

Tell each prescriber that you are pregnant, including your dentist. If several teams treat you, ask who will keep the medication list up to date and communicate changes. The prenatal supplement guide can help you include products that are easy to overlook.

Ask about continuing and changing treatment

Do not routinely stop a medicine prescribed to keep you well without first getting advice. Contact the prescriber promptly when you find out you are pregnant. If they are unavailable, a pharmacist, GP or midwife can help you identify the appropriate service.

Ask what the medicine is doing for you, whether an alternative would work as well and whether a change would need supervision. A warning in a leaflet should prompt a specific conversation. It does not establish that every person must make the same change.

Follow specific urgent instructions

Some medicines have explicit instructions that override general advice about continuing treatment. Isotretinoin capsules must not be taken during pregnancy. If you become pregnant while taking them, stop and contact the prescriber promptly for specialist advice.

Topiramate is another example where the reason for treatment matters. UK safety advice says to stop it straight away and contact your GP if pregnancy is suspected while using it for migraine prevention. If it is used for epilepsy, do not stop it yourself; arrange urgent specialist advice. The migraine treatment guide explains this distinction.

Leave with a plan you can use

Write down what to continue, what changes, who will prescribe it and when the next review is due. Ask what to do if vomiting prevents you from taking a dose or if you miss one. The answer can differ between medicines.

Before buying a new remedy, have its ingredients checked alongside the list. If you already took something and are worried, report the product, amount and timing rather than guessing the effect. Your clinician can seek specialist pregnancy medicine advice when the available information is unclear.