Can Phentermine Affect Your Period?

Can Phentermine Affect your Period?

Phentermine is a stimulant that can affect the menstrual cycle and cause irregular periods, weight loss, breast tenderness, headaches and insomnia.

The drug causes dry mouth in some people who take it.

If you have a regular period, your cycle may become shorter or longer.

If you have a regular period, your cycle may become shorter or longer. If it's shorter, that could mean that you ovulate earlier than usual and therefore are more fertile. If it's longer, this could be due to lack of ovulation or anovulation (no egg production).

If you normally have irregular periods, you may notice more consistency, particularly if you have PCOS.  

If you have PCOS and are looking for ways to manage your symptoms or improve your fertility, phentermine is a good option. Phentermine works by increasing the amount of the hormone norepinephrine in the brain. Norepinephrine signals hunger, which can then lead to weight loss after taking phentermine. The effective dose for women with PCOS is between 5 and 15 mg per day; however, if you have been diagnosed with high blood pressure or heart disease and are taking phentermine, consult your doctor before beginning treatment.