carbamazepine vs ethinyl estradiol/norethindrone
PlainMeds reviewed this comparison against our methodology in August 2026. It places FDA and CMS record fields side by side, without recommending either medication.
Side-by-side comparison of carbamazepine and ethinyl estradiol/norethindrone. Data from FDA drug databases (Orange Book, NDC Directory, recalls, shortages) covering 20,000+ approved drugs, plus CMS pricing; see our methodology.
minor Known Drug Interaction
Some drugs or herbal products that may decrease the effectiveness of hormonal contraceptives include: barbiturates bosentan carbamazepine felbamate griseofulvin oxcarbazepine phenytoin rifampin St.
Tegretol
Loestrin, Junel
Carbamazepine is a medicine used to control seizures and treat nerve pain. It works by reducing abnormal electrical activity in the brain and calming nerve signals.
Lo Loestrin Fe is a birth control pill. It helps prevent pregnancy in women.
Carbamazepine is used to treat certain types of seizures, including partial seizures and generalized tonic-clonic seizures. It can also treat mixed seizure patterns. Carbamazepine also treats the pain from trigeminal neuralgia, a nerve disorder that causes intense facial pain. It is also sometimes used for glossopharyngeal neuralgia.
Lo Loestrin Fe is used to prevent pregnancy. It contains two hormones, a progestin and an estrogen. It works by preventing the release of an egg from your ovary.
Carbamazepine is an anticonvulsant. It works by reducing the spread of seizure activity in the brain. It also stabilizes nerve impulses to reduce pain.
Lo Loestrin Fe contains two hormones: norethindrone acetate and ethinyl estradiol. These hormones prevent ovulation (the release of an egg from the ovary). They also change the lining of the uterus, making it harder for a fertilized egg to implant.
- • Dizziness
- • Drowsiness
- • Unsteadiness
- • Nausea
- • Vomiting
- • Nausea or vomiting
- • Headache
- • Irregular bleeding
- • Painful periods
- • Weight changes
- Seizure 3,609
- Drug Interaction 3,369
- Fall 3,044
- Dizziness 2,862
- Pyrexia 2,689
No adverse event reports.
Carbamazepine can cause severe skin reactions, including Stevens-Johnson syndrome (SJS) and toxic epidermal necrolysis (TEN), which can be fatal. If you are of Asian descent, you may need a blood test before starting this medicine. Carbamazepine can also cause serious blood problems like aplastic anemia and agranulocytosis. Contact your doctor right away if you develop a fever, sore throat, rash, or unusual bleeding or bruising.
Cigarette smoking increases your risk of serious heart problems from birth control pills. This risk is higher if you are over 35 and smoke. Women over 35 who smoke should not use Lo Loestrin Fe.
Carbamazepine may harm an unborn baby. Talk to your doctor if you are pregnant or plan to become pregnant. It is not known if carbamazepine passes into breast milk, so talk to your doctor about breastfeeding.
Do not use Lo Loestrin Fe if you are pregnant. It can also reduce milk production while breastfeeding, so other birth control options are recommended.
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How to Read This carbamazepine vs ethinyl estradiol/norethindrone Comparison
carbamazepine is classified in the Anticonvulsant drug class, while ethinyl estradiol/norethindrone sits within the Combined Oral Contraceptive class. Drugs from different classes work through distinct mechanisms, so a head-to-head comparison illustrates trade-offs rather than equivalence. Both drugs are prescription-only, so a licensed provider must authorize use.
Adverse event totals above are pulled from the FDA's Adverse Event Reporting System (FAERS). For these top-ranked reactions alone, carbamazepine has 15,573 submissions while ethinyl estradiol/norethindrone has 0. Those figures reflect cumulative reporting volume, not per-patient risk, so older, widely dispensed drugs typically look worse on count alone. These two drugs have a known minor interaction flagged in FDA labeling, attributed to carbamazepine makes your body process birth control hormones faster, which can make the birth control less effective at preventing pregnancy.. Serious warnings, pregnancy guidance, and contraindications can differ even when indications overlap.
A table cannot represent individual circumstances. Data here is sourced from FDA Structured Product Labels (SPL) and FAERS, both of which update as manufacturers and clinicians submit new information. This registry does not provide medical, treatment, substitution, or medication-change directions for carbamazepine or ethinyl estradiol/norethindrone.
Registry boundary: This comparison displays source-record fields and does not provide individualized medical direction.