Pregnancy, breastfeeding and fertility while taking alendronic acid

Alendronic acid is not recommended during pregnancy. This is because there has not been enough research into its safety.

It's usually OK to take alendronic acid while breastfeeding. Talk to your doctor or pharmacist first, and they will help you to decide.

It's not known how much alendronic acid gets into breast milk, but it's likely to be very low levels. Not a lot of it will pass through to your baby, so it's unlikely to cause them any side effects.

It's very rare for breastfed babies to have side effects from medicines you're taking. But it's important to keep monitoring your baby if you're taking any medicine while breastfeeding.

Contact your healthcare professional or call 111 as soon as possible if you notice that your baby is:

• not feeding as well as usual
• being irritable
• being sick (vomiting) or has diarrhoea
• constipated

If your baby has any symptoms that are not listed, or if you're worried about them, you can also call 111 or contact any healthcare professional.

Carry on taking the medicine, and keep breastfeeding as usual until you've got advice about your baby's symptoms.