Will painkillers affect fertility, pregnancy or breastfeeding?
Paracetamol and opioid analgesics may be used during pregnancy.
However, regular or prolonged use is probably best avoided during pregnancy because of a possible increased risk for the baby of wheezing or childhood asthma, or of an undescended testicle in boys.
Paracetamol is considered a good choice if you’re breastfeeding. Caution is advised with drugs containing codeine as its metabolism is unpredictable and there’s a possibility that the baby’s central nervous system (which controls breathing and heart rate) could be affected.
It’s not thought that painkillers are likely to be harmful if taken by men wishing to father a child.