Like any medicine, the hormones used in hormone replacement therapy (HRT) can cause side effects.
Any side effects usually improve over time, so it's a good idea to persevere with treatment for at least 3 months if possible.
Speak to a GP if you have severe side effects or they continue for longer than 3 months.
The main side effects of taking oestrogen include:
These side effects will often pass after a few weeks. To ease side effects, try:
If side effects persist, your GP may recommend switching to a different way of taking oestrogen (for example, changing from a tablet to a patch), changing the medicine you're taking, or lowering your dose.
The main side effects of taking progestogen include:
As with side effects of oestrogen, these will usually pass after a few weeks.
If they persist, a GP may recommend switching to a different way of taking progestogen, changing the medicine you're taking, or lowering your dose.
Many women believe that taking HRT will make them put on weight, but there's no evidence to support this claim.
You may gain some weight during the menopause, but this often happens regardless of whether you take HRT.
Find out more about the risks of HRT
The Yellow Card Scheme allows you to report suspected side effects from any type of medicine you are taking.
It's run by a medicines safety watchdog called the Medicines and Healthcare products Regulatory Agency (MHRA).