Felodipine 10 mg Tablet, Film Coated, Extended Release
🆔 Identity & classification
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🏷️ RxNorm drug class
This medicine belongs to the Dihydropyridine Calcium Channel Blocker class.
Where does this data come from?
🏭 Manufacturer & labeler
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🩺 Clinical
- Felodipine is prescribed to lower high blood pressure (hypertension). Keeping your blood pressure under control with this medicine helps reduce your risk of serious events like str...
- Mostly yes, but two things matter. First, avoid grapefruit juice entirely — it can more than double the amount of felodipine in your blood, which raises your risk of side effects....
- Can I eat or drink normally when I take this tablet?
- Swallow it whole, every time. Felodipine is an extended-release tablet, which means it's designed to release the medicine slowly over the day. Crushing or chewing it would release...
Patient education
Supplement & herbal interactions
Some supplements/herbs that may interact with Felodipine — tap one for details:
Felodipine may be associated with lower levels of 2 nutrients — worth a chat with your pharmacist, not a cause for alarm.
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Ask a licensed pharmacist directly — free, answered by our team.
💊 What it looks like
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🧪 Inactive Ingredients / Excipients
Inactive ingredients, also called excipients, are components of the drug product other than the active ingredient. They may include fillers, dyes, coatings, preservatives, flavors, or other formulation ingredients.
💡 Tap an ingredient (hover on desktop) to see what it is and why it’s used.
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UNII 1K09F3G675
Ferric oxide red is an inorganic iron compound used as a colorant in medicines. It gives tablets, capsules, or other dosage forms a red or reddish tint for identification and appearance.
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UNII EX438O2MRT
Ferric oxide yellow is a naturally occurring iron compound used as a colorant in medications. It gives tablets, capsules, and other forms a yellow or golden hue for identification and appearance.
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UNII 9XZ8H6N6OH
A plant-based cellulose derivative used as a binder to hold tablet ingredients together, a thickener in liquids, and a coating agent to control how fast the medicine dissolves.
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UNII 3NXW29V3WO
Hypromellose is a plant-based thickener made from cellulose. It's used in medicines as a binder to hold ingredients together, a coating for tablets, and a thickener for liquids.
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UNII 24H4NWX5CO
Kaolin is a naturally occurring clay mineral. It's used in tablets and capsules as a filler and absorbent to add bulk, improve texture, and help bind ingredients together.
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UNII EWQ57Q8I5X
Lactose monohydrate is a natural sugar derived from milk. It serves as a filler and binder in tablets and capsules, helping create the proper size, texture, and consistency of the medicine.
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UNII OP1R32D61U
Microcrystalline cellulose is a purified form of cellulose, a natural fiber from plant sources. It acts as a binder and filler in tablets and capsules, helping hold ingredients together and give the medicine its shape and size.
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UNII 3WJQ0SDW1A
Polyethylene glycol is a synthetic liquid or solid polymer used in medicines as a solvent, lubricant, and humectant. It helps dissolve active ingredients, reduces friction during manufacturing, and retains moisture in the final product.
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UNII 7YC686GQ8F
A synthetic oily substance made from castor oil. It works as a solubilizer and emulsifier to help mix oily and water-based ingredients together in the medicine.
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UNII 7CV7WJK4UI
Sodium stearyl fumarate is a synthetic compound made from stearyl alcohol and fumaric acid. It acts as a lubricant and glidant in tablets and capsules, helping ingredients flow smoothly during manufacturing and preventing sticking.
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UNII 15FIX9V2JP
Titanium dioxide is a bright white mineral powder commonly used as a colorant and opacifying agent. It makes pills and tablets white or lighter in color and helps make coatings non-transparent.
11 inactive ingredients listed in the exact product block matched to this NDC.
Where does this data come from?
ingredient classCode="IACT" elements from the exact product block matched by this NDC. Label-section narrative from DailyMed / the openFDA label index is shown separately when available.Inactive ingredient FAQ
Are inactive ingredients the same for every manufacturer?
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💲 Pricing
A drug doesn't have one price. Each row is a different public payment system, and none is what you'd pay at the counter — that depends on your insurance. The ⓘ on each row explains what it measures.
| Price system | Per each | Per package |
|---|---|---|
| Retail pharmacies payNADAC · weekly | Not in the retail survey — common for institutional, discontinued, or low-volume packs. | |
| Medicaid paysCMS SDUD · 12 mo | No recent Medicaid claims on file for this NDC — rare and low-volume NDCs are suppressed in the public data. | |
| Medicare drug plans payPart D · Q2 2026 | $0.3632 | $36.32 / 100 tablets |
Where does this data come from?
🔁 Therapeutic equivalents
| Product | Labeler | Pack | NADAC/unit | TE | Status | Price vs. this |
|---|---|---|---|---|---|---|
| Felodipine 10 mg 00603-3583-21 | Endo | 100 tablets | $0.125 | AB | Availability likely | — |
| Felodipine 10 mg 13668-0134-01 | Torrent | 100 tablets | $0.125 | AB | Availability likely | — |
| Felodipine 10 mg 23155-0050-01 | Heritage | 100 tablets | $0.125 | AB | Availability likely | — |
| Felodipine 10 mg 57237-0110-01 | Rising | 100 tablets | $0.125 | AB | Availability likely | — |
| Felodipine 10 mg 62135-0648-90 | Chartwell | 90 tablets | $0.125 | AB | Availability likely | — |
| Felopdipine 10 mg 69367-0266-01 | Westminster | 100 tablets | $0.125 | AB | Availability likely | — |
| Felodipine 10 mg 50090-1124-00 | A-S | 30 tablets | — | AB | FDA listed | — |
| Felodipine 10 mg 50090-5870-00 | A-S | 30 tablets | — | AB | FDA listed | — |
| Felopdipine 10 mg 50090-7206-00 | A-S | 30 tablets | — | AB | FDA listed | — |
| Felodipine 10 mg 51407-0089-01 | Golden | 100 tablets | — | AB | FDA listed | — |
| Felodipine 10 mg 61442-0433-01 | Carlsbad | 100 tablets | — | AB | FDA listed | — |
| Felodipine 10 mg 63629-2016-01 | Bryant | 500 tablets | — | AB | FDA listed | — |
| Felodipine 10 mg 63629-2191-01 | Bryant | 100 tablets | — | AB | FDA listed | — |
| Felodipine 10 mg 63629-2192-01 | Bryant | 500 tablets | — | AB | Discontinued | — |
| Felodipine 10 mg 65862-0675-01 | Aurobindo | 100 tablets | — | — | FDA listed | — |
| Felodipine 10 mgthis 68462-0235-11 | Glenmark | 10 tablets | — | AB | FDA listed | — |
| Felodipine 10 mg 69117-0030-01 | Yiling | 100 tablets | — | AB | FDA listed | — |
| Felodipine 10 mg 71205-0922-00 | Proficient | 100 tablets | — | AB | FDA listed | — |
| Felodipine 10 mg 72162-1160-01 | Bryant | 100 tablets | — | AB | FDA listed | — |
| Felodipine 10 mg 72162-1744-05 | Bryant | 500 tablets | — | AB | FDA listed | — |
Where does this data come from?
⏳ Availability & generic status
This product is an FDA-approved generic. Other versions of the same drug are listed under Therapeutic equivalents, least expensive first.
Where does this data come from?
💊 Medicaid utilization by pack size
📊 Medicare Part D spend CMS · PART D · 2026 (Q1)
🔬 Reported adverse events (FAERS)
Top reported reactions
Age at onset
Reporter sex
Serious outcomes
Where does this data come from?
📦 Packaging — all sizes for this product
| Package NDC | Description | Per unit | Per pack | Marketing start | Status |
|---|---|---|---|---|---|
| 68462-0235-01 | 100 TABLET, FILM COATED, EXTENDED RELEASE in 1 BOTTLE (68462-235-01) | $0.1247 / ea | $12.47 | 2010-12-20 | Active |
| 68462-0235-10 | 1000 TABLET, FILM COATED, EXTENDED RELEASE in 1 BOTTLE (68462-235-10) | — | — | 2010-12-20 | Active |
| 68462-0235-11 You're viewing this | 10 BLISTER PACK in 1 CARTON (68462-235-11) / 10 TABLET, FILM COATED, EXTENDED RELEASE in 1 BLISTER PACK | — | — | 2010-12-20 | Active |
| 68462-0235-90 | 90 TABLET, FILM COATED, EXTENDED RELEASE in 1 BOTTLE (68462-235-90) | — | — | 2010-12-20 | Active |
This pack shows little to no recent Medicaid volume — the 100 tablets pack carries most fills. See all packs ↓
Pack size FAQ
What quantity is in NDC 68462-0235-11?
What NDC number is used to bill for this package of Felodipine 10 mg Tablet, Film Coated, Extended Release?
Prices are the latest CMS NADAC pharmacy acquisition cost per NDC; per-pack figures are per-unit × pack quantity, shown only when the pack is denominated in the same measure NADAC prices.
🧭 About this NDC listing & data coverage
What data is (and isn’t) available for this NDC — tap to expand
| NDC identity (package / product / labeler codes) | ✓ Available |
| Labeler | ✓ Available |
| Product & package description | ✓ Available |
| Marketing category & status | ✓ Available |
| Active ingredient / dosage form / route | ✓ Available |
| FDA label (SPL via DailyMed) | ✓ Available |
| Package photos | ✓ Available |
| Inactive ingredients (structured) | ✓ Available |
| NADAC pharmacy acquisition price (CMS) | — Not published for this NDC CMS publishes NADAC only for NDCs reported in its retail-pharmacy survey. |
| Orange Book / therapeutic-equivalence data | ✓ Available |
| HCPCS J-code billing crosswalk | — Not published for this NDC Most self-administered / retail products have no J-code — that is normal. |
| Medicaid utilization (CMS SDUD) | — Not published for this NDC CMS reports utilization only for NDCs with Medicaid claims above its privacy threshold. |
Questions about this listing
Why is there no price listed?
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What do the three segments of this NDC mean?
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Who lists this product with the FDA?
Do I need a prescription for this product?
Where does this data come from?
📄 Full prescribing information FDA SPL
🎯 Indications and Usage ▾
INDICATIONS AND USAGE Felodipine tablets are indicated for the treatment of hypertension, to lower blood pressure. Lowering blood pressure lowers the risk of fatal and non-fatal cardiovascular events, primarily strokes and myocardial infarctions. These benefits have been seen in controlled trials of antihypertensive drugs from a wide variety of pharmacologic classes including felodipine.
Control of high blood pressure should be part of comprehensive cardiovascular risk management, including, as appropriate, lipid control, diabetes management, antithrombotic therapy, smoking cessation, exercise, and limited sodium intake. Many patients will require more than 1 drug to achieve blood pressure goals. For specific advice on goals and management, see published guidelines, such as those of the National High Blood Pressure Education Program’s Joint National Committee on Prevention, Detection, Evaluation, and Treatment of High Blood Pressure (JNC).
Numerous antihypertensive drugs, from a variety of pharmacologic classes and with different mechanisms of action, have been shown in randomized controlled trials to reduce cardiovascular morbidity and mortality, and it can be concluded that it is blood pressure reduction, and not some other pharmacologic property of the drugs, that is largely responsible for those benefits. The largest and most consistent cardiovascular outcome benefit has been a reduction in the risk of stroke, but reductions in myocardial infarction and cardiovascular mortality also have been seen regularly.
Elevated systolic or diastolic pressure causes increased cardiovascular risk, and the absolute risk increase per mmHg is greater at higher blood pressures, so that even modest reductions of severe hypertension can provide substantial benefit. Relative risk reduction from blood pressure reduction is similar across populations with varying absolute risk, so the absolute benefit is greater in patients who are at higher risk independent of their hypertension (for example, patients with diabetes or hyperlipidemia), and such patients would be expected to benefit from more aggressive treatment to a lower blood pressure goal.
Some antihypertensive drugs have smaller blood pressure effects (as monotherapy) in black patients, and many antihypertensive drugs have additional approved indications and effects (eg, on angina, heart failure, or diabetic kidney disease). These considerations may guide selection of therapy. Felodipine tablets may be administered with other antihypertensive agents.
⏱️ Dosage and Administration ▾
DOSAGE AND ADMINISTRATION The recommended starting dose is 5 mg once a day. Depending on the patient's response, the dosage can be decreased to 2.5 mg or increased to 10 mg once a day. These adjustments should occur generally at intervals of not less than 2 weeks.
The recommended dosage range is 2.5-10 mg once daily. In clinical trials, doses above 10 mg daily showed an increased blood pressure response but a large increase in the rate of peripheral edema and other vasodilatory adverse events (see ADVERSE REACTIONS ). Modification of the recommended dosage is usually not required in patients with renal impairment.
Felodipine should regularly be taken either without food or with a light meal (see CLINICAL PHARMACOLOGY, Pharmacokinetics and Metabolism ). Felodipine should be swallowed whole and not crushed or chewed. Geriatric Use - Patients over 65 years of age are likely to develop higher plasma concentrations of felodipine (see CLINICAL PHARMACOLOGY ).
In general, dose selection for an elderly patient should be cautious, usually starting at the low end of the dosing range (2.5 mg daily). Elderly patients should have their blood pressure closely monitored during any dosage adjustment. Patients with Impaired Liver Function - Patients with impaired liver function may have elevated plasma concentrations of felodipine and may respond to lower doses of felodipine; therefore, patients should have their blood pressure monitored closely during dosage adjustment of felodipine (see CLINICAL PHARMACOLOGY ).
⛔ Contraindications ▾
CONTRAINDICATIONS Felodipine is contraindicated in patients who are hypersensitive to this product.
🤒 Adverse Reactions ▾
ADVERSE REACTIONS In controlled studies in the United States and overseas, approximately 3000 patients were treated with felodipine as either the extended-release or the immediate-release formulation. The most common clinical adverse events reported with felodipine administered as monotherapy at the recommended dosage range of 2.5 mg to 10 mg once a day were peripheral edema and headache. Peripheral edema was generally mild, but it was age and dose related and resulted in discontinuation of therapy in about 3% of the enrolled patients.
Discontinuation of therapy due to any clinical adverse event occurred in about 6% of the patients receiving felodipine, principally for peripheral edema, headache, or flushing. Adverse events that occurred with an incidence of 1.5% or greater at any of the recommended doses of 2.5 mg to 10 mg once a day (Felodipine, N = 861; Placebo, N = 334), without regard to causality, are compared to placebo and are listed by dose in the table below. These events are reported from controlled clinical trials with patients who were randomized to a fixed dose of felodipine or titrated from an initial dose of 2.5 mg or 5 mg once a day.
A dose of 20 mg once a day has been evaluated in some clinical studies. Although the antihypertensive effect of felodipine is increased at 20 mg once a day, there is a disproportionate increase in adverse events, especially those associated with vasodilatory effects (see DOSAGE AND ADMINISTRATION ). Percent of Patients with Adverse Events in Controlled Trials* of Felodipine (N=861) as Monotherapy without Regard to Causality (Incidence of discontinuations shown in parentheses) Body System Adverse Events Placebo N = 334 2.5 mg N = 255 5 mg N = 581 10 mg N = 408 Body as a Whole Peripheral Edema 3.3 (0.0) 2.0 (0.0) 8.8 (2.2) 17.4 (2.5) Asthenia 3.3 (0.0) 3.9 (0.0) 3.3 (0.0) 2.2 (0.0) Warm Sensation 0.0 (0.0) 0.0 (0.0) 0.9 (0.2) 1.5 (0.0) Cardiovascular Palpitation 2.4 (0.0) 0.4 (0.0) 1.4 (0.3) 2.5 (0.5) Digestive Nausea 1.5 (0.9) 1.2 (0.0) 1.7 (0.3) 1.0 (0.7) Dyspepsia 1.2 (0.0) 3.9 (0.0) 0.7 (0.0) 0.5 (0.0) Constipation 0.9 (0.0) 1.2 (0.0) 0.3 (0.0) 1.5 (0.2) Nervous Headache 10.2 (0.9) 10.6 (0.4) 11.0 (1.7) 14.7 (2.0) Dizziness 2.7 (0.3) 2.7 (0.0) 3.6 (0.5) 3.7 (0.5) Paresthesia 1.5 (0.3) 1.6 (0.0) 1.2 (0.0) 1.2 (0.2) Respiratory Upper Respiratory Infection 1.8 (0.0) 3.9 (0.0) 1.9 (0.0) 0.7 (0.0) Cough 0.3 (0.0) 0.8 (0.0) 1.2 (0.0) 1.7 (0.0) Rhinorrhea 0.0 (0.0) 1.6 (0.0) 0.2 (0.0) 0.2 (0.0) Sneezing 0.0 (0.0) 1.6 (0.0) 0.0 (0.0) 0.0 (0.0) Skin Rash 0.9 (0.0) 2.0 (0.0) 0.2 (0.0) 0.2 (0.0) Flushing 0.9 (0.3) 3.9 (0.0) 5.3 (0.7) 6.9 (1.2) *Patients in titration studies may have been exposed to more than one dose level of felodipine.
Adverse events that occurred in 0.5 up to 1.5% of patients who received felodipine in all controlled clinical trials at the recommended dosage range of 2.5 mg to 10 mg once a day, and serious adverse events that occurred at a lower rate, or events reported during marketing experience (those lower rate events are in italics) are listed below. These events are listed in order of decreasing severity within each category, and the relationship of these events to administration of felodipine is uncertain: Body as a Whole: Chest pain, facial edema, flu-like illness; Cardiovascular: Myocardial infarction, hypotension, syncope, angina pectoris, arrhythmia , tachycardia, premature beats; Digestive: Abdominal pain, diarrhea, vomiting, dry mouth, flatulence, acid regurgitation; Endocrine: Gynecomastia; Hematologic: Anemia; Metabolic: ALT (SGPT) increased; Musculoskeletal: Arthralgia, back pain, leg pain, foot pain, muscle cramps, myalgia, arm pain, knee pain, hip pain; Nervous/Psychiatric: Insomnia, depression, anxiety disorders, irritability, nervousness, somnolence, decreased libido; Respiratory: Dyspnea, pharyngitis, bronchitis, influenza, sinusitis, epistaxis, respiratory infection; Skin: Angioedema , contusion, erythema, urticaria, leukocytoclastic vasculitis; Sp…
🔄 Drug Interactions ▾
Drug Interactions CYP3A4 Inhibitors - Felodipine is metabolized by CYP3A4. Coadministration of CYP3A4 inhibitors (e.g., ketoconazole, itraconazole, erythromycin, grapefruit juice, cimetidine) with felodipine may lead to several-fold increases in the plasma levels of felodipine, either due to an increase in bioavailability or due to a decrease in metabolism. These increases in concentration may lead to increased effects, (lower blood pressure and increased heart rate).
These effects have been observed with coadministration of itraconazole (a potent CYP3A4 inhibitor). Caution should be used when CYP3A4 inhibitors are coadministered with felodipine. A conservative approach to dosing felodipine should be taken.
The following specific interactions have been reported: Itraconazole - Coadministration of another extended-release formulation of felodipine with itraconazole resulted in approximately 8-fold increase in the AUC, more than 6-fold increase in the C max , and 2-fold prolongation in the half-life of felodipine. Erythromycin - Coadministration of felodipine with erythromycin resulted in approximately 2.5-fold increase in the AUC and C max , and about 2-fold prolongation in the half-life of felodipine. Grapefruit juice - Coadministration of felodipine with grapefruit juice resulted in more than 2-fold increase in the AUC and C max , but no prolongation in the half-life of felodipine.
Cimetidine - Coadministration of felodipine with cimetidine (a non-specific CYP-450 inhibitor) resulted in an increase of approximately 50% in the AUC and the C max , of felodipine. Beta-Blocking Agents - A pharmacokinetic study of felodipine in conjunction with metoprolol demonstrated no significant effects on the pharmacokinetics of felodipine. The AUC and C max of metoprolol, however, were increased approximately 31 and 38%, respectively.
In controlled clinical trials, however, beta-blockers including metoprolol were concurrently administered with felodipine and were well tolerated. Digoxin - When given concomitantly with felodipine the pharmacokinetics of digoxin in patients with heart failure were not significantly altered. Anticonvulsants - In a pharmacokinetic study, maximum plasma concentrations of felodipine were considerably lower in epileptic patients on long-term anticonvulsant therapy (e.g., phenytoin, carbamazepine, or phenobarbital) than in healthy volunteers.
In such patients, the mean area under the felodipine plasma concentration-time curve was also reduced to approximately 6% of that observed in healthy volunteers. Since a clinically significant interaction may be anticipated, alternative antihypertensive therapy should be considered in these patients. Tacrolimus - Felodipine may increase the blood concentration of tacrolimus.
When given concomitantly with felodipine, the tacrolimus blood concentration should be followed and the tacrolimus dose may need to be adjusted. Other Concomitant Therapy - In healthy subjects there were no clinically significant interactions when felodipine was given concomitantly with indomethacin or spironolactone. Interaction with Food - See CLINICAL PHARMACOLOGY , Pharmacokinetics and Metabolism.
🤰 Pregnancy ▾
Pregnancy: Pregnancy Category C. Teratogenic Effects- Studies in pregnant rabbits administered doses of 0.46, 1.2, 2.3, and 4.6 mg/kg/day (from 0.8 to 8 times** the maximum recommended human dose on a mg/m 2 basis) showed digital anomalies consisting of reduction in size and degree of ossification of the terminal phalanges in the fetuses. The frequency and severity of the changes appeared dose related and were noted even at the lowest dose.
These changes have been shown to occur with other members of the dihydropyridine class and are possibly a result of compromised uterine blood flow. Similar fetal anomalies were not observed in rats given felodipine. In a teratology study in cynomolgus monkeys, no reduction in the size of the terminal phalanges was observed, but an abnormal position of the distal phalanges was noted in about 40% of the fetuses.
Nonteratogenic Effects- A prolongation of parturition with difficult labor and an increased frequency of fetal and early postnatal deaths were observed in rats administered doses of 9.6 mg/kg/day (8 times** the maximum human dose on a mg/m 2 basis) and above. Significant enlargement of the mammary glands, in excess of the normal enlargement for pregnant rabbits, was found with doses greater than or equal to 1.2 mg/kg/day (2.1 times the maximum human dose on a mg/m 2 basis). This effect occurred only in pregnant rabbits and regressed during lactation.
Similar changes in the mammary glands were not observed in rats or monkeys. There are no adequate and well-controlled studies in pregnant women. If felodipine is used during pregnancy, or if the patient becomes pregnant while taking this drug, she should be apprised of the potential hazard to the fetus, possible digital anomalies of the infant, and the potential effects of felodipine on labor and delivery and on the mammary glands of pregnant females.
(**Based on patient weight of 50 kg)
🧒 Pediatric Use ▾
Pediatric Use Safety and effectiveness in pediatric patients have not been established.
🧓 Geriatric Use ▾
Geriatric Use Clinical studies of felodipine did not include sufficient numbers of subjects aged 65 and over to determine whether they respond differently from younger subjects. Other reported clinical experience has not identified differences in responses between the elderly and younger patients. Pharmacokinetics, however, indicate that the availability of felodipine is increased in older patients (see CLINICAL PHARMACOLOGY, Geriatric Use ).
In general, dose selection for an elderly patient should be cautious, usually starting at the low end of the dosing range, reflecting the greater frequency of decreased hepatic, renal, or cardiac function, and of concomitant disease or other drug therapy.
🆘 Overdosage ▾
OVERDOSAGE Oral doses of 240 mg/kg and 264 mg/kg in male and female mice, respectively, and 2390 mg/kg and 2250 mg/kg in male and female rats, respectively, caused significant lethality. In a suicide attempt, one patient took 150 mg felodipine together with 15 tablets each of atenolol and spironolactone and 20 tablets of nitrazepam. The patient's blood pressure and heart rate were normal on admission to hospital; he subsequently recovered without significant sequelae.
Overdosage might be expected to cause excessive peripheral vasodilation with marked hypotension and possibly bradycardia. If severe hypotension occurs, symptomatic treatment should be instituted. The patient should be placed supine with the legs elevated.
The administration of intravenous fluids may be useful to treat hypotension due to overdosage with calcium antagonists. In case of accompanying bradycardia, atropine (0.5-1 mg) should be administered intravenously. Sympathomimetic drugs may also be given if the physician feels they are warranted.
It has not been established whether felodipine can be removed from the circulation by hemodialysis. To obtain up-to-date information about the treatment of overdose, consult your Regional Poison-Control Center. Telephone numbers of certified poison-control centers are listed in the Physicians' Desk Reference (PDR).
In managing overdose, consider the possibilities of multiple-drug overdoses, drug-drug interactions, and unusual drug kinetics in your patient.
🧬 Clinical Pharmacology ▾
CLINICAL PHARMACOLOGY Mechanism of Action Felodipine is a member of the dihydropyridine class of calcium channel antagonists (calcium channel blockers). It reversibly competes with nitrendipine and/or other calcium channel blockers for dihydropyridine binding sites, blocks voltage-dependent Ca ++ currents in vascular smooth muscle and cultured rabbit atrial cells, and blocks potassium-induced contracture of the rat portal vein. In vitro studies show that the effects of felodipine on contractile processes are selective, with greater effects on vascular smooth muscle than cardiac muscle.
Negative inotropic effects can be detected in vitro , but such effects have not been seen in intact animals. The effect of felodipine on blood pressure is principally a consequence of a dose-related decrease of peripheral vascular resistance in man, with a modest reflex increase in heart rate (see Cardiovascular Effects). With the exception of a mild diuretic effect seen in several animal species and man, the effects of felodipine are accounted for by its effects on peripheral vascular resistance.
Pharmacokinetics and Metabolism Following oral administration, felodipine is almost completely absorbed and undergoes extensive first-pass metabolism. The systemic bioavailability of felodipine is approximately 20%. Mean peak concentrations following the administration of felodipine are reached in 2.5 to 5 hours.
Both peak plasma concentration and the area under the plasma concentration time curve (AUC) increase linearly with doses up to 20 mg. Felodipine is greater than 99% bound to plasma proteins. Following intravenous administration, the plasma concentration of felodipine declined triexponentially with mean disposition half-lives of 4.8 minutes, 1.5 hours, and 9.1 hours.
The mean contributions of the three individual phases to the overall AUC were 15, 40, and 45%, respectively, in the order of increasing t 1/2 . Following oral administration of the immediate-release formulation, the plasma level of felodipine also declined polyexponentially with a mean terminal t 1/2 of 11 to 16 hours. The mean peak and trough steady-state plasma concentrations achieved after 10 mg of the immediate-release formulation given once a day to normal volunteers, were 20 and 0.5 nmol/L, respectively.
The trough plasma concentration of felodipine in most individuals was substantially below the concentration needed to effect a half-maximal decline in blood pressure (EC 50 ) [4-6 nmol/L for felodipine], thus precluding once-a-day dosing with the immediate-release formulation. Following administration of a 10 mg dose of felodipine, the extended-release formulation, to young, healthy volunteers, mean peak and trough steady-state plasma concentrations of felodipine were 7 and 2 nmol/L, respectively. Corresponding values in hypertensive patients (mean age 64) after a 20 mg dose of felodipine were 23 and 7 nmol/L.
Since the EC 50 for felodipine is 4 to 6 nmol/L, a 5 to 10 mg dose of felodipine in some patients, and a 20 mg dose in others, would be expected to provide an antihypertensive effect that persists for 24 hours (see Cardiovascular Effects below and DOSAGE AND ADMINISTRATION ). The systemic plasma clearance of felodipine in young healthy subjects is about
0.8L/min, and the apparent volume of distribution is about 10 L/kg. Following an oral or intravenous dose of 14 C-labeled felodipine in man, about 70% of the dose of radioactivity was recovered in urine and 10% in the feces. A negligible amount of intact felodipine is recovered in the urine and feces (< 0.5%).
Six metabolites, which account for 23% of the oral dose, have been identified; none has significant vasodilating activity. Following administration of felodipine to hypertensive patients, mean peak plasma concentrations at steady state are about 20% higher than after a single dose. Blood pressure response is correlated with plasma concentrations of felodipine.
The bioavailability of felodipine is influenced by the…
🧬 Mechanism of Action ▾
Mechanism of Action Felodipine is a member of the dihydropyridine class of calcium channel antagonists (calcium channel blockers). It reversibly competes with nitrendipine and/or other calcium channel blockers for dihydropyridine binding sites, blocks voltage-dependent Ca ++ currents in vascular smooth muscle and cultured rabbit atrial cells, and blocks potassium-induced contracture of the rat portal vein. In vitro studies show that the effects of felodipine on contractile processes are selective, with greater effects on vascular smooth muscle than cardiac muscle.
Negative inotropic effects can be detected in vitro , but such effects have not been seen in intact animals. The effect of felodipine on blood pressure is principally a consequence of a dose-related decrease of peripheral vascular resistance in man, with a modest reflex increase in heart rate (see Cardiovascular Effects). With the exception of a mild diuretic effect seen in several animal species and man, the effects of felodipine are accounted for by its effects on peripheral vascular resistance.
📦 How Supplied / Storage and Handling ▾
HOW SUPPLIED Felodipine extended-release tablets USP, 2.5 mg are green colored film coated, circular shaped, biconvex tablets engraved with “G19” on one side of the tablet and plain on the other side. They are supplied as follows: Bottles of 90 NDC 68462-233-90 Bottles of 100 NDC 68462-233-01 Bottles of 1000 NDC 68462-233-10 Unit dose packages of 100 (10 x 10) NDC 68462-233-11 Felodipine extended-release tablets USP 5 mg are light pink colored film coated, circular shaped, biconvex tablets engraved with “G19” on one side of the tablet and “5” on the other side.
They are supplied as follows: Bottles of 90 NDC 68462-234-90 Bottles of 100 NDC 68462-234-01 Bottles of 1000 NDC 68462-234-10 Unit dose packages of 100 (10 x 10) NDC 68462-234-11 Felodipine extended-release tablets USP 10 mg are brown colored film coated, circular shaped, biconvex tablets engraved with “G19” on one side of the tablet and “10” on the other side. They are supplied as follow: Bottles of 90 NDC 68462-235-90 Bottles of 100 NDC 68462-235-01 Bottles of 1000 NDC 68462-235-10 Unit dose packages of 100 (10 x 10) NDC 68462-235-11 Storage: Store at 20 o -25 o C (68 o -77 o F); excursions permitted to 15 o -30 o C (59 o -86 o F) [see USP Controlled Room Temperature].
Keep container tightly closed. Protect from light.
📦 Storage and Handling ▾
Storage: Store at 20 o -25 o C (68 o -77 o F); excursions permitted to 15 o -30 o C (59 o -86 o F) [see USP Controlled Room Temperature]. Keep container tightly closed. Protect from light.
📋 Description ▾
DESCRIPTION Felodipine extended-release tablets USP are a calcium antagonist (calcium channel blocker). Felodipine is a dihydropyridine derivative that is chemically described as ± ethyl methyl 4-(2,3-dichlorophenyl)-1,4-dihydro-2,6-dimethyl-3,5-pyridinedicarboxylate. Its molecular formula is C 18 H 19 Cl 2 NO 4 and its structural formula is: Felodipine USP is a slightly yellowish, crystalline powder with a molecular weight of 384.26.
It is insoluble in water and is freely soluble in dichloromethane and ethanol. Felodipine is a racemic mixture. Felodipine extended-release tablets provide extended-release of felodipine.
They are available as tablets containing 2.5 mg, 5 mg, or 10 mg of felodipine for oral administration. In addition to the active ingredient felodipine, the felodipine extended-release tablets 2.5 mg, 5 mg and 10 mg contain the following inactive ingredients: hydroxypropyl cellulose, hypromellose, kaolin, lactose monohydrate, microcrystalline cellulose, polyoxyl 40 hydrogenated castor oil, sodium stearyl fumarate, Opadry Green 20B51525 (2.5 mg), Opadry Pink 20B84706 (5 mg) and Opadry Red 20B55372 (10 mg). Opadry Green 20B51525 consists of hypromellose, hydroxypropyl cellulose, macrogol, titanium dioxide, D&C Yellow No.
10 Aluminium Lake, FD&C Blue No. 2 Aluminium Lake and ferric oxide yellow. Opadry Pink 20B84706 consists of hypromellose, hydroxypropyl cellulose, macrogol, titanium dioxide, ferric oxide red and ferric oxide yellow.
Opadry Red 20B55372 consists of hypromellose, hydroxypropyl cellulose, macrogol, titanium dioxide, ferric oxide red and ferric oxide yellow. structure
💬 Information for Patients ▾
Information for Patients Patients should be instructed to take felodipine whole and not to crush or chew the tablets. They should be told that mild gingival hyperplasia (gum swelling) has been reported. Good dental hygiene decreases its incidence and severity.
NOTE: As with many other drugs, certain advice to patients being treated with felodipine is warranted. This information is intended to aid in the safe and effective use of this medication. It is not a disclosure of all possible adverse or intended effects.