What is Kelnor 1/35: Uses, Warnings & Interactions

Updated May 14, 2025  •  Published Dec 30, 2020

Kelnor 1/35 overview

BRAND NAMES:

  • Kelnor 1/35, Kelnor 1/50, Zovia 1/35e, Zovia 1/50e, Zovia 1/50e

Generic Names:

  • Ethynodiol Diac-Eth Estradiol

Uses:

  • Prevents pregnancy.

Therapeutic Classes:

  • Contraceptive

Forms:

  • Tablet

How it’s taken:

  • By mouth

What is Kelnor 1/35 used for?

What form(s) does Kelnor 1/35 come in

  • Tablet

What are common Kelnor 1/35 doses?

  • Disp Pack 28 Tablets

Common Kelnor 1/35 prescriptions

  • Kelnor 1/35
    1 package (28 tablets), 1-35mg-mcg disp pack

How to take Kelnor 1/35

  • Your doctor will tell you how much medicine to use. Do not use more than directed.

  • Read and follow the patient instructions that come with this medicine. Talk to your doctor or pharmacist if you have any questions.

  • You may begin taking the pills on the first day of your menstrual period, or on the first Sunday after your period begins. If your period starts on a Sunday, start taking this medicine on that day. Then continue taking one pill each day in the order that they appear in the package.

  • You should also use a second form of birth control (including condoms, diaphragms, or contraceptive foams and jellies) when you first start using this medicine.

  • Take your pill at the same time every day. Birth control pills work best when there is no more than 24 hours between doses.

  • Store the medicine in a closed container at room temperature, away from heat, moisture, and direct light.

  • Missed dose: If you miss one light yellow pill, take it as soon as you can, then take your next pill at your regular schedule.If you miss two light yellow pills in week 1 or 2, take two pills as soon as you can and two more pills the next day. Then go back to your regular schedule of taking one pill every day. Use another kind of birth control until you have been taking light yellow pills for seven days in a row.If you miss two light yellow pills in week 3 or three or more light yellow pills in a row in weeks 1, 2, or 3:Day 1 start€”Throw out the rest of your pills and start a new pack on the same day.Sunday start€”Continue taking one pill a day until Sunday, then throw out the rest of the pack and start a new pack that same day.Use a second form of birth control (including condom, spermicide) for 7 days after you miss a dose, to prevent pregnancy.If you miss any white pills, throw away the missed pills and go back to your regular schedule.You could have light bleeding or spotting any time you do not take a pill on schedule. The more pills you miss, the more likely you are to have bleeding.If you miss two periods in a row, call your doctor for a pregnancy test before you take any more pills.

  • Your doctor will tell you how much medicine to use. Do not use more than directed.

  • Read and follow the patient instructions that come with this medicine. Talk to your doctor or pharmacist if you have any questions.

  • You should also use a second form of birth control (including condoms, diaphragms, or contraceptive foams and jellies) when you first start using this medicine.

  • Take your pill at the same time every day. Birth control pills work best when there is no more than 24 hours between doses.

  • You may begin taking the pills on the first day of your menstrual period, or on the first Sunday after your period begins. If your period starts on a Sunday, start taking this medicine on that day. Then continue taking one pill each day in the order that they appear in the package.

  • Store the medicine in a closed container at room temperature, away from heat, moisture, and direct light.

  • Missed dose: If you miss one light yellow pill, take it as soon as you can, then take your next pill at your regular schedule.If you miss two light yellow pills in week 1 or 2, take two pills as soon as you can and two more pills the next day. Then go back to your regular schedule of taking one pill every day. Use another kind of birth control until you have been taking light yellow pills for seven days in a row.If you miss two light yellow pills in week 3 or three or more light yellow pills in a row in weeks 1, 2, or 3:Day 1 start€”Throw out the rest of your pills and start a new pack on the same day.Sunday start€”Continue taking one pill a day until Sunday, then throw out the rest of the pack and start a new pack that same day.Use a second form of birth control (including condom, spermicide) for 7 days after you miss a dose, to prevent pregnancy.If you miss any white pills, throw away the missed pills and go back to your regular schedule.You could have light bleeding or spotting any time you do not take a pill on schedule. The more pills you miss, the more likely you are to have bleeding.If you miss two periods in a row, call your doctor for a pregnancy test before you take any more pills.

What to do if you miss a dose of Kelnor 1/35

  • If you miss any inactive pills, throw away the missed pills and go back to your regular schedule.

  • You could have light bleeding or spotting any time you do not take a pill on schedule. The more pills you miss, the more likely you are to have bleeding.

  • If you miss one active pill, take it as soon as you can. Then take your next pill at the regular time. This means you may take two pills in one day.

  • If you miss two active pills in a row, take two pills as soon as you can. Then take two pills on the next day. Then go back to your regular schedule of taking one pill every day. Use another kind of birth control until you have been taking active pills for seven days in a row.

  • If you miss three or more active pills, do not take the pills you missed. Go back to taking one pill every day, starting with the pill for the day you remember. For example, you may forget or miss taking your pills on Monday, Tuesday, and Wednesday. If this happens, take your Thursday pill (do not take the three you missed) and continue with your regular schedule.

Kelnor 1/35 contraindications

  • This medicine is not right for everyone. Do not use it if you had an allergic reaction to ethinyl estradiol or ethynodiol diacetate, or if you are pregnant. Tell your doctor if you have liver disease or liver cancer, breast cancer, ovarian cancer, cancer of the uterus, heart disease, a blood vessel disorder, or a history of blood clots, heart attacks, or strokes. Do not use this medicine if you have unusual vaginal bleeding, or if you have ever had jaundice (yellow eyes or skin) caused by pregnancy or birth control pills.

Kelnor 1/35 warnings

  • It is not safe to take this medicine during pregnancy. It could harm an unborn baby. Tell your doctor right away if you become pregnant.

  • Tell your doctor if you are breastfeeding or if you have recently been pregnant. Tell your doctor if you have high blood pressure, high cholesterol in the blood, diabetes, breast lumps, migraine headaches, tuberculosis, or a history of depression, seizures, gallbladder disease, heart disease, kidney disease, or irregular monthly periods, or a family history of breast cancer.

  • This medicine may cause the following problems:Increased risk of heart attack, stroke, or blood clotsIncreased risk of cancer (including cancer of the breast, endometrium, ovaries, and cervix)Liver problemsEye or vision problemsGallbladder diseaseHigh cholesterol in the bloodHigh blood pressure

  • This medicine will not protect you from getting HIV/AIDS or other sexually transmitted diseases.

  • You might have some light bleeding or spotting when you first start using this medicine. However, if you have heavy bleeding or the bleeding lasts more than seven days in a row, call your doctor.

  • Tell any doctor or dentist who treats you that you are using this medicine. You may need to stop using this medicine several days before you have surgery or medical tests.

  • Tell any doctor or dentist who treats you that you are using this medicine. This medicine may affect certain medical test results.

  • Your doctor will check your progress and the effects of this medicine at regular visits. Keep all appointments.

  • Keep all medicine out of the reach of children. Never share your medicine with anyone.

  • This medicine will not protect you from getting HIV/AIDS or other sexually transmitted diseases. If this is a concern for you, talk with your doctor.

  • Your doctor will check your progress and the effects of this medicine at regular visits. Keep all appointments.

  • Call your doctor for a pregnancy test if your menstrual period does not start while taking this pills.

Kelnor 1/35 interactions

  • Make sure your doctor knows if you have diabetes, depression, kidney disease, liver disease, a history of migraine headaches, seizures, or tuberculosis (TB).

  • Make sure your doctor knows about all the other medical problems you have before taking this pills.

  • This medicine can cause serious side effects such as heart attack or stroke. You are much more likely to have these side effects if you smoke cigarettes, are overweight, are over 35 years of age, or have certain health problems.

  • You might have some light bleeding or spotting when you first start using this medicine. This is usually normal and should not last long. However, if you have heavy bleeding or the bleeding lasts more than seven days in a row, call your doctor.

  • Make sure your doctor knows if you have vomiting or diarrhea while using this pills, you may need to use another kind of birth control for a few days.

  • Tell any doctor or dentist who treats you that you are using this medicine. You may need to stop using this medicine several days before you have surgery or medical tests.

  • Tell any doctor or dentist who treats you that you are using this medicine. This medicine may affect certain medical test results.

  • This medicine will not protect you from getting HIV/AIDS or other sexually transmitted diseases. If this is a concern for you, talk with your doctor.

  • Your doctor will check your progress and the effects of this medicine at regular visits. Keep all appointments.

  • Call your doctor for a pregnancy test if your menstrual period does not start while taking this pills.

  • Do not use this medicine together with medicine to treat hepatitis C virus infection, including ombitasvir/paritaprevir/ritonavir, with or without dasabuvir.

  • Some medicines can affect how ethinyl estradiol/ethynodiol diacetate works. Tell your doctor if you are using any of the following:Phenylbutazone, troglitazoneMedicine to treat infection (including ampicillin, griseofulvin, tetracyclines)Medicine to teat seizures (including phenobarbital, phenytoin

Kelnor 1/35 side effects

Serious Side Effects

  • Unusual or unexpected vaginal bleeding or heavy bleeding

  • Sudden severe headache, problems with vision, speech, or walking

  • Allergic reaction: Itching or hives, swelling in your face or hands, swelling or tingling in your mouth or throat, chest tightness, trouble breathing

  • Breast lumps, tenderness, pain, swelling, or discharge

  • Chest pain or tightness, trouble breathing, or coughing up blood

  • Dark urine, pale stools, loss of appetite, yellow skin or eyes

  • Irregular, late, or missed menstrual periods

  • Numbness or weakness on one side of your body

  • Pain in your lower leg (calf)

  • Rapid weight gain, swelling in your hands, ankles, or feet

  • Sudden and severe stomach pain, nausea, vomiting, lightheadedness

  • Yellowing of your skin or the whites of your eyes.

Less Serious Side Effects

  • Problems with wearing contact lenses.

  • Loss of hair

  • Rapid weight gain or loss

  • Trouble sleeping.

  • Problems with wearing contact lenses

  • Mood changes, depression, nervousness, trouble sleeping

  • Acne, mild skin rash, or darkened skin on your face

  • Vaginal spotting or light bleeding, itching, discharge

  • Mild nausea, vomiting, diarrhea, stomach cramps, bloated feeling