As the menopause can also make you feel very tired, this is something I have tried and found very useful.
Rhodiola is used to combat fatigue and is one of those herbal remedies where you can tell whether it's going to work within days rather than weeks. You sort of feel a lift and know whether you will benefit from it in about 4-5 days.
One precaution is that if it helps you, don't be tempted to increase the dose as this can actually cause anxiety.
I found out the hard way.
In fact since I am quite sensitive to herbs etc, I only use 100mg of Rhodiola Rosea, on an empty stomach, in the morning.