Generic name: Ethinyl Estradiol and Ethynodiol Diacetate [ ETH-in-il-es-tra-DYE-ole-& e-thye-noe-DYE-ole-dye-AS-e-tate ]
Brand names: Kelnor 1/35, Kelnor 1/50, Zovia 1/35E (28), Zovia 1/50E (28)
Drug class: Contraceptives
Medically reviewed by Drugs.com. Last updated on Feb 21, 2023.
- Smoking cigarettes while using Kelnor 1/50 (ethinyl estradiol and ethynodiol diacetate) raises the chance of very bad heart and blood-related side effects. This chance is raised with age (mainly in women older than 35 years of age). It is also raised with the number of cigarettes smoked. It is strongly advised not to smoke. Do not use Kelnor 1/50 (ethinyl estradiol and ethynodiol diacetate) if you smoke and are older than 35 years of age.
Uses of Kelnor 1/50:
- It is used to prevent pregnancy.
- It may be given to you for other reasons. Talk with the doctor.
What do I need to tell my doctor BEFORE I take Kelnor 1/50?
For all patients taking Kelnor 1/50 (ethinyl estradiol and ethynodiol diacetate):
- If you have an allergy to ethinyl estradiol, ethynodiol diacetate, or any other part of Kelnor 1/50 (ethinyl estradiol and ethynodiol diacetate).
- If you are allergic to Kelnor 1/50 (ethinyl estradiol and ethynodiol diacetate); any part of Kelnor 1/50 (ethinyl estradiol and ethynodiol diacetate); or any other drugs, foods, or substances. Tell your doctor about the allergy and what signs you had.
- If you have had any of these health problems: Blood clots, blood clotting problem, breast cancer or other cancer where hormones make it grow, diseased blood vessels in the brain or heart, disease of a heart valve with problems, heart disease, chest pain caused by angina, heart attack, stroke, high blood pressure, liver disease, liver tumor, very bad headache or migraine, or diabetes that affects blood flow.
- If you have had any of these health problems: Endometrial cancer, cancer of the cervix or vagina, or vaginal bleeding where the cause is not known.
- If you have surgery and need bedrest.
- If you turned yellow during pregnancy or with estrogen-based or hormone contraceptive use.
- If you are pregnant or may be pregnant. Do not take Kelnor 1/50 (ethinyl estradiol and ethynodiol diacetate) if you are pregnant.
- If you are breast-feeding or plan to breast-feed.
- If you are taking ombitasvir, paritaprevir, and ritonavir (with or without dasabuvir).
- If your child has not had her first period.
This is not a list of all drugs or health problems that interact with Kelnor 1/50 (ethinyl estradiol and ethynodiol diacetate).
Tell your doctor and pharmacist about all of your drugs (prescription or OTC, natural products, vitamins) and health problems. You must check to make sure that it is safe for you to take Kelnor 1/50 (ethinyl estradiol and ethynodiol diacetate) with all of your drugs and health problems. Do not start, stop, or change the dose of any drug without checking with your doctor.
What are some things I need to know or do while I take Kelnor 1/50?
- Tell all of your health care providers that you take Kelnor 1/50 (ethinyl estradiol and ethynodiol diacetate). This includes your doctors, nurses, pharmacists, and dentists. This medicine may need to be stopped before certain types of surgery as your doctor has told you. If Kelnor 1/50 (ethinyl estradiol and ethynodiol diacetate) is stopped, your doctor will tell you when to start taking Kelnor 1/50 (ethinyl estradiol and ethynodiol diacetate) again after your surgery or procedure.
- This medicine may raise the chance of blood clots, a stroke, or a heart attack. Talk with the doctor.
- Talk with your doctor if you will need to be still for long periods of time like long trips, bedrest after surgery, or illness. Not moving for long periods may raise your chance of blood clots.
- Call your doctor right away if you have signs of a blood clot like chest pain or pressure; coughing up blood; shortness of breath; swelling, warmth, numbness, change of color, or pain in a leg or arm; or trouble speaking or swallowing.
- High blood pressure has happened with drugs like this one. Have your blood pressure checked as you have been told by your doctor.
- Have blood work checked as you have been told by the doctor. Talk with the doctor.
- If you have high blood sugar (diabetes), you will need to watch your blood sugar closely.
- Be sure to have regular breast exams and gynecology check-ups. You will also need to do breast self-exams as you have been told.
- This medicine may affect certain lab tests. Tell all of your health care providers and lab workers that you take Kelnor 1/50 (ethinyl estradiol and ethynodiol diacetate).
- Certain drugs, herbal products, or health problems could cause Kelnor 1/50 (ethinyl estradiol and ethynodiol diacetate) to not work as well. Be sure your doctor knows about all of your drugs and health problems.
- This medicine does not stop the spread of diseases like HIV or hepatitis that are passed through blood or having sex. Do not have any kind of sex without using a latex or polyurethane condom. Do not share needles or other things like toothbrushes or razors.
- If you have any signs of pregnancy or if you have a positive pregnancy test, call your doctor right away.
How is this medicine (Kelnor 1/50) best taken?
Use Kelnor 1/50 (ethinyl estradiol and ethynodiol diacetate) as ordered by your doctor. Read all information given to you. Follow all instructions closely.
- Take Kelnor 1/50 (ethinyl estradiol and ethynodiol diacetate) at the same time of day.
- Take with or without food. Take with food if it causes an upset stomach.
- Do not skip doses, even if you do not have sex very often.
- If you throw up or have diarrhea, Kelnor 1/50 (ethinyl estradiol and ethynodiol diacetate) may not work as well to prevent pregnancy. Use an extra form of birth control, like condoms, until you check with your doctor.
- If you miss 2 periods in a row, take a pregnancy test before starting a new cycle.
What do I do if I miss a dose?
- If a dose is missed, check the package insert or call the doctor to find out what to do. If using Kelnor 1/50 (ethinyl estradiol and ethynodiol diacetate) to prevent pregnancy, another form of birth control may need to be used for some time to prevent pregnancy.
What are some side effects that I need to call my doctor about right away?
WARNING/CAUTION: Even though it may be rare, some people may have very bad and sometimes deadly side effects when taking a drug. Tell your doctor or get medical help right away if you have any of the following signs or symptoms that may be related to a very bad side effect:
- Signs of an allergic reaction, like rash; hives; itching; red, swollen, blistered, or peeling skin with or without fever; wheezing; tightness in the chest or throat; trouble breathing, swallowing, or talking; unusual hoarseness; or swelling of the mouth, face, lips, tongue, or throat.
- Signs of liver problems like dark urine, feeling tired, not hungry, upset stomach or stomach pain, light-colored stools, throwing up, or yellow skin or eyes.
- Signs of gallbladder problems like pain in the upper right belly area, right shoulder area, or between the shoulder blades; yellow skin or eyes; fever with chills; bloating; or very upset stomach or throwing up.
- Signs of high blood pressure like very bad headache or dizziness, passing out, or change in eyesight.
- Weakness on 1 side of the body, trouble speaking or thinking, change in balance, drooping on one side of the face, or blurred eyesight.
- Very bad headache.
- Low mood (depression).
- Feeling very tired or weak.
- Very bad belly pain.
- Not able to pass urine or change in how much urine is passed.
- A lump in the breast, breast pain or soreness, or nipple discharge.
- Vaginal itching or discharge.
- Spotting or vaginal bleeding that is very bad or does not go away.
- Bulging eyes.
- Change in eyesight.
- Loss of eyesight.
- Change in how contact lenses feel in the eyes.
What are some other side effects of Kelnor 1/50?
All drugs may cause side effects. However, many people have no side effects or only have minor side effects. Call your doctor or get medical help if any of these side effects or any other side effects bother you or do not go away:
- Feeling more or less hungry.
- Weight gain or loss.
- Upset stomach or throwing up.
- Period (menstrual) changes. These include spotting or bleeding between cycles.
- Enlarged breasts.
- Breast soreness.
- Hair loss.
- Change in sex interest.
- Feeling nervous and excitable.
- Pimples (acne).
- This medicine may cause dark patches of skin on your face. Avoid sun, sunlamps, and tanning beds. Use sunscreen and wear clothing and eyewear that protects you from the sun.
These are not all of the side effects that may occur. If you have questions about side effects, call your doctor. Call your doctor for medical advice about side effects.
You may report side effects to the FDA at 1-800-332-1088. You may also report side effects at https://www.fda.gov/medwatch.
If OVERDOSE is suspected:
If you think there has been an overdose, call your poison control center or get medical care right away. Be ready to tell or show what was taken, how much, and when it happened.
How do I store and/or throw out Kelnor 1/50?
- Store at room temperature.
- Store in a dry place. Do not store in a bathroom.
- Keep all drugs in a safe place. Keep all drugs out of the reach of children and pets.
- Throw away unused or expired drugs. Do not flush down a toilet or pour down a drain unless you are told to do so. Check with your pharmacist if you have questions about the best way to throw out drugs. There may be drug take-back programs in your area.
Consumer Information Use and Disclaimer
- If your symptoms or health problems do not get better or if they become worse, call your doctor.
- Do not share your drugs with others and do not take anyone else's drugs.
- Some drugs may have another patient information leaflet. Check with your pharmacist. If you have any questions about Kelnor 1/50 (ethinyl estradiol and ethynodiol diacetate), please talk with your doctor, nurse, pharmacist, or other health care provider.
- If you think there has been an overdose, call your poison control center or get medical care right away. Be ready to tell or show what was taken, how much, and when it happened.
More about Kelnor 1 / 50 (ethinyl estradiol / ethynodiol)
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- During pregnancy
- Drug class: contraceptives
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