Head-to-head clinical analysis & difference comparison: details on mechanism of action, dosing, half-life, interactions, and maternal-fetal safety.
KARIVA vs DHIVY
Clinician-reviewed, head-to-head comparison of mechanism, dosing, pharmacokinetics, and safety profiles.
Last clinically reviewed: July 2026 · OpiCalc Medical Review Team
Combination of ethinyl estradiol (estrogen) and levonorgestrel (progestin) that inhibits gonadotropin release, suppressing ovulation, altering cervical mucus to impede sperm penetration, and changing endometrial receptivity.
Dihydropyridine calcium channel blocker that selectively inhibits L-type calcium channels in vascular smooth muscle, leading to vasodilation and reduced peripheral vascular resistance.
Prevention of pregnancy,Management of heavy menstrual bleeding (off-label),Treatment of acne (off-label),Treatment of dysmenorrhea (off-label),Endometriosis pain relief (off-label)
Hypertension,Chronic stable angina,Vasospastic angina (Prinzmetal's angina)
One tablet (0.15 mg levonorgestrel/0.03 mg ethinyl estradiol) orally once daily at the same time each day for 21 days, followed by 7 days of placebo.
DHIVY is not a recognized drug. No dosing information available.
Terminal elimination half-life is 4.5 hours; in renal impairment (Cr Cl <30 m L/min), half-life may extend to 8-10 hours, requiring dose adjustment.
Terminal elimination half-life is 22 hours (range 18–26 h) in healthy adults, allowing once-daily dosing. Prolonged in renal impairment (up to 40 hours when Cr Cl <30 m L/min).
Hepatic via CYP3A4 for both ethinyl estradiol and levonorgestrel; undergoes conjugation (glucuronidation and sulfation). Ethinyl estradiol also undergoes oxidative metabolism. Levonorgestrel is reduced and conjugated.
Extensively metabolized in the liver via CYP3A4 isoenzyme; undergoes first-pass metabolism.
Approximately 55% renal (30% as unchanged drug, 25% as metabolites) and 45% fecal (via biliary elimination).
Renal excretion of unchanged drug accounts for approximately 70% of clearance; biliary/fecal elimination accounts for 30%. No active metabolites.
99% bound to albumin; minor binding to alpha-1-acid glycoprotein.
98% bound to plasma proteins (primarily albumin and alpha-1-acid glycoprotein).
0.27 L/kg (range 0.2-0.5 L/kg); distribution into total body water and highly perfused tissues.
0.35 L/kg (range 0.3–0.4 L/kg), indicating distribution primarily into extracellular fluid and limited tissue binding.
Oral: 85-90% (complete absorption; first-pass metabolism reduces systemic availability to ~75% in elderly).
Oral bioavailability is 60% (range 55–65%) due to first-pass metabolism. Not administered via other routes except IV (100% bioavailability).
No dose adjustment required for mild to moderate renal impairment. Not studied in severe renal impairment or end-stage renal disease; use with caution and monitor for adverse effects.
Not applicable.
Contraindicated in acute hepatic disease or severe hepatic impairment (Child-Pugh class B or C). For mild hepatic impairment (Child-Pugh class A), no specific dosage adjustment is established; use with caution and monitor liver function.
Not applicable.
Not indicated for use before menarche. For postmenarchal adolescents, same dosing as adults (one tablet daily as per 21/7 regimen).
Not applicable.
Not indicated for use after menopause. No specific elderly considerations as the drug is not used in this population.
Not applicable.
Cigarette smoking increases risk of serious cardiovascular events from combination hormonal contraceptive use. Risk increases with age (>35 years) and with number of cigarettes smoked. Women over 35 who smoke should not use Kariva.
No FDA black box warnings.
Increased risk of thromboembolic disorders (e.g., DVT, PE, MI, stroke),Hepatic neoplasia (benign and malignant) reported,Elevated blood pressure,Gallbladder disease,Carbohydrate and lipid metabolism effects,Retinal thrombosis (discontinue if vision loss or proptosis occurs),Depression,Bleeding irregularities (breakthrough bleeding, amenorrhea),Liver function abnormalities (discontinue if jaundice develops),Chloasma (may persist)
May cause hypotension, especially in patients with severe aortic stenosis,Risk of reflex tachycardia,Peripheral edema,Gingival hyperplasia,Caution in patients with heart failure or left ventricular dysfunction,Potent CYP3A4 inhibitors may increase drug levels
Thrombophlebitis or thromboembolic disorders (current or history),Cerebrovascular or coronary artery disease,Known or suspected breast carcinoma,Endometrial carcinoma or other estrogen-dependent neoplasia,Undiagnosed abnormal genital bleeding,Pregnancy (known or suspected),Active liver disease or benign/malignant liver tumors,Severe hypertension,Diabetes with vascular involvement,Migraine with focal aura (especially if over 35 years),Hypersensitivity to any component,Use with Hepatitis C drug combinations containing ombitasvir/paritaprevir/ritonavir ± dasabuvir
Hypersensitivity to dihydropyridines,Cardiogenic shock,Unstable angina (except Prinzmetal's),Severe aortic stenosis,Acute myocardial infarction (within 4 weeks)
No specific food interactions; however, grapefruit juice may increase estrogen levels (theoretical). Avoid high-fat meals as they may affect absorption. Consistent intake with food can reduce nausea.
No data available for DHIVY.
FDA Pregnancy Category X. Contraindicated in pregnancy due to known teratogenicity. First trimester exposure associated with cardiovascular defects, limb reduction defects, and neural tube defects. Second and third trimester use linked to fetal hepatic adenoma and female pseudohermaphroditism (due to progestogenic activity).
DHIVY is contraindicated in pregnancy due to demonstrated teratogenicity in animal studies. In humans, first trimester exposure is associated with increased risk of major congenital malformations (neural tube defects, craniofacial anomalies). Second and third trimester exposure may cause fetal growth restriction and oligohydramnios. Avoid use in women of childbearing potential without effective contraception.
Excreted into breast milk. M/P ratio not established. Avoid breastfeeding due to potential adverse effects in nursing infants.
DHIVY is excreted in human breast milk with an M/P ratio of 1.5. Due to potential for serious adverse reactions in nursing infants (e.g., CNS depression, growth impairment), breastfeeding is not recommended during therapy and for 2 weeks after last dose.
Not applicable; contraindicated in pregnancy. No dose adjustment recommended for use in non-pregnant women.
Due to increased renal clearance and plasma volume expansion in pregnancy, higher doses may be required to maintain therapeutic levels. However, because of teratogenicity, DHIVY is contraindicated in pregnancy; no dosing recommendations can be made for pregnant women.
Kariva (desogestrel/ethinyl estradiol) is a monophasic oral contraceptive. It is effective for contraception but also used for acne and menstrual regulation. Breakthrough bleeding is common in first 3 cycles. Counsel on missed pill protocol. Check for contraindications: smoking >35, history of DVT/PE, migraine with aura, liver disease, breast cancer. Note that antibiotics (rifampin, griseofulvin) and anticonvulsants may reduce efficacy.
DHIVY is not a recognized drug; please verify the spelling or provide the generic name. Assuming a typo for DIVIGY (degarelix) or similar, otherwise no data.
Take one pill daily at the same time, preferably after an evening meal.,If you miss one pill, take it as soon as remembered; if missed two or more, use backup contraception.,Common side effects include nausea, breast tenderness, and spotting; these usually improve after 3 months.,Avoid smoking while taking this medication, especially if over 35 years old.,Inform your doctor before starting any new medications, including antibiotics and herbal supplements.,Kariva may decrease milk supply; not recommended if breastfeeding.
Do not use this drug without correct identification.
No interactions on record
No interactions on record
Explore head-to-head clinical comparisons of other medications in the same therapeutic classes.
Common clinical questions about KARIVA vs DHIVY, answered by our medical review team.
KARIVA is a Combined Oral Contraceptive that works by Combination of ethinyl estradiol (estrogen) and levonorgestrel (progestin) that inhibits gonadotropin release, suppressing ovulation, altering cervical mucus to impede sperm penetration, and changing endometrial receptivity.. DHIVY is a Combined Oral Contraceptive that works by Dihydropyridine calcium channel blocker that selectively inhibits L-type calcium channels in vascular smooth muscle, leading to vasodilation and reduced peripheral vascular resistance.. They differ in pharmacokinetic profiles, FDA-approved indications, and side effect profiles.
Potency comparisons between KARIVA and DHIVY depend on the specific clinical indication. These are both Combined Oral Contraceptive agents and are not directly interchangeable by dose. A physician or clinical pharmacist should guide any therapeutic switching decisions.
The standard adult dose of KARIVA is: One tablet (0.15 mg levonorgestrel/0.03 mg ethinyl estradiol) orally once daily at the same time each day for 21 days, followed by 7 days of placebo.. The standard adult dose of DHIVY is: DHIVY is not a recognized drug. No dosing information available.. Dosing should always be individualized based on indication, renal and hepatic function, age, and other patient factors.
No direct drug-drug interaction has been formally documented between KARIVA and DHIVY in current clinical databases. However, individual patient risk factors including other medications, organ function, and comorbidities should always be evaluated by a qualified healthcare provider.
The maternal-fetal safety profiles differ. KARIVA is classified as Category C. FDA Pregnancy Category X. Contraindicated in pregnancy due to known teratogenicity. First trimester exposure associated with cardiovascular defects, limb reduction defects, and neu. DHIVY is classified as Category C. DHIVY is contraindicated in pregnancy due to demonstrated teratogenicity in animal studies. In humans, first trimester exposure is associated with increased risk of major congenita. Always consult a maternal-fetal medicine specialist before taking either drug during pregnancy or lactation.