Pregnancy, breastfeeding and fertility while taking isosorbide mononitrate and isosorbide dinitrate

Isosorbide mononitrate and isosorbide dinitrate can be taken in pregnancy.

However, if you're pregnant or trying for a baby then you should be seen as soon as possible by a pregnancy specialist (obstetrician) and a heart specialist (cardiologist), so your heart health and medicine can be reviewed.

Keep taking your medicine until you've had your review.

If your doctor, midwife or health visitor says your baby is healthy, you may be able to take isosorbide mononitrate or isosorbide dinitrate while you're breastfeeding. Talk to your doctor or pharmacist first, and they'll help you to decide.

It's not known how much isosorbide mononitrate or isosorbide dinitrate gets into breast milk, but it's likely to be low levels. It's unlikely to cause any side effects in your baby.

It's important that you keep taking your medicine to keep you well. Breastfeeding will also benefit both you and your baby.

Talk to your health visitor, midwife, pharmacist or doctor if you have any concerns about your baby. This includes if they're:

• not feeding as well as usual or not putting on weight as you would expect
• unusually sleepy
• being irritable