Common side effects (up to 1 in 10 of every 100 patients): mood swings, headaches, nausea, breast pain, problems with periods such as them being irregular or absent.
Uncommon side effects (up to 1 in 10 of every 1000 patients): depression, decreased interest in sex, nervousness, sleepiness, dizziness, “pins and needles,” migraines, varicose veins, a rise in blood pressure, stomach aches, vomiting, indigestion, intestinal gas, inflammation of the stomach, upset stomach and diarrhea, acne, itching, rash, aches and pains, vaginal infection such as thrush, pelvic pain, breast enlargement, benign breast lumps, vaginal bleeding (this normally goes away if treatment is continued), vaginal discharge, hot flashes, inflammation of the vagina, period problems such as painful, reduced or very heavy periods, vaginal dryness, lack of energy, increased sweating, fluid retention and weight increase.
Rare side effects (up to 1 in 10 of every 10,000 patients): fungal infection, allergic reaction, endocrine, increased appetite, loss of appetite, abnormally high concentration of potassium in the blood, low concentration of sodium in the blood.
This is not an exhaustive list of side effects. Please refer to the package insert for further information.