Taking levonorgestrel tablets once at the age of 46 is usually not harmful. Levonorgestrel tablets are hormonal drugs that are mainly used to supplement progesterone. Women taking levonorgestrel tablets can be used to treat endocrine disorders caused by a lack of progesterone, menstrual abnormalities and for short-term contraception. After taking levonorgestrel tablets, women may experience nausea, vomiting, lack of appetite, dizziness, tiredness, acne, atopic dermatitis and other adverse reactions. It is contraindicated for patients suffering from cardiovascular disease, liver and kidney disease, diabetes, asthma, epilepsy, migraine, thrombophilia, gallbladder disease, and psychosis. Especially if you are allergic to levonorgestrel tablets or allergic to women need to pay attention to caution. If the nature of the drug has changed, it is also necessary to pay attention to the prohibition of taking it. Normal women who take levonorgestrel tablets once in a while is not harmful, because the female body itself will secrete progesterone, taking a levonorgestrel tablets will not cause women to undergo great physiological changes. If you need to take levonorgestrel tablets, it is recommended to take under the guidance of a doctor, do not blindly use their own medication. It is recommended that women should pay attention to regular health checkups, and go to the hospital as soon as possible if they have menstrual disorders or dysmenorrhea.