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Carac® Cream, 0.5%
(fluorouracil) Cream
FOR TOPICAL DERMATOLOGICAL USE ONLY
(NOT FOR OPHTHALMIC, ORAL, OR INTRAVAGINAL USE)
Carac® (fluorouracil cream) Cream, 0.5% , contains fluorouracil for topical dermatologic use. Chemically, fluorouracil is 5-fluoro-2,4(1H, 3H)-pyrimidinedione. The molecular formula is C4H3FN2O2. Fluorouracil has a molecular weight of 130.08.
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Carac Cream contains 0.5% fluorouracil, with 0.35% being incorporated into a patented porous microsphere (Microsponge®)↑ composed of methyl methacrylate / glycol dimethacrylate cross polymer and dimethicone. The cream formulation contains the following other inactive ingredients: carbomer 940, dimethicone, glycerin, methyl gluceth-20, methyl methacrylate / glycol dimethacrylate crosspolymer, methylparaben, octyl hydroxy stearate, polyethylene glycol 400, polysorbate 80, propylene glycol, propylparaben, purified water, sorbitan monooleate, stearic acid, and trolamine.
Last updated on RxList: 11/10/2008
Carac cream should be applied once a day to the skin where actinic keratosis lesions appear, using enough to cover the entire area with a thin film. Carac cream should not be applied near the eyes, nostrils or mouth. Carac cream should be applied ten minutes after thoroughly washing, rinsing, and drying the entire area. Carac cream may be applied using the fingertips. Immediately after application, the hands should be thoroughly washed. Carac should be applied up to 4 weeks as tolerated. Continued treatment up to 4 weeks results in greater lesion reduction. Local irritation is not markedly increased by extending treatment from 2 to 4 weeks, and is generally resolved within 2 weeks of cessation of treatment.
Cream - 30 gram tube NDC 0066-7150-30
Store at Controlled Room Temperature 20 to 25°C (68 to 77°F) [see USP]. Prescribing Information as of 2006.
Keep out of the reach of children.
Dermik Laboratories, a business of sanofi-aventis U.S. LLC, Bridgewater, NJ 08807. FDA rev date: 12/16/2003
Last updated on RxList: 11/10/2008
The following were adverse events considered to be drug-related and occurring with a frequency of ≥ 1% with Carac: application site reaction (94.6%), and eye irritation (5.4%). The signs and symptoms of facial irritation (application site reaction) are presented below.
Summary of Facial Irritation Signs and Symptoms - Pooled
Phase 3 Studies
| Clinical Sign or Symptom |
Active One Week |
Active Two Week |
Active Four Week |
ALL Active Treatments |
Vehicle Treatments |
|||||
| N=85 | N=87 | N=85 | N=257 | N=127 | ||||||
| n | (%) | n | (%) | n | (%) | n | (%) | n | (%) | |
| Erythema | 76 | (89.4) | 82 | (94.3) | 82 | (96.5) | 240 | (93.4) | 76 | (59.8) |
| Dryness | 59 | (69.4) | 76 | (87.4) | 79 | (92.9) | 214 | (83.3) | 60 | (47.2) |
| Burning | 51 | (60.0) | 70 | (80.5) | 71 | (83.5) | 192 | (74.7) | 28 | (22.0) |
| Erosion | 21 | (24.7) | 38 | (43.7) | 54 | (63.5) | 113 | (44.0) | 17 | (13.4) |
| Pain | 26 | (30.6) | 34 | (39.1) | 52 | (61.2) | 112 | (43.6) | 7 | (5.5) |
| Edema | 12 | (14.1) | 28 | (32.2) | 51 | (60.0) | 91 | (35.4) | 6 | (4.7) |
During clinical trials, irritation generally began on day 4 and persisted for the remainder of treatment. Severity of facial irritation at the last treatment visit was slightly below baseline for the vehicle group, mild to moderate for the 1 week active treatment group, and moderate for the 2 and 4 week active treatment groups. Mean severity declined rapidly for each active group after completion of treatment and was below baseline for each group at the week 2 post-treatment follow-up visit.
Thirty-one patients (12% of those treated with Carac in the Phase 3 clinical studies) discontinued study treatment early due to facial irritation. Except for three patients, discontinuation of treatment occurred on or after day 11 of treatment.
Eye irritation adverse events, described as mild to moderate in intensity, were characterized as burning, watering, sensitivity, stinging and itching. These adverse events occurred across all treatment arms in one of the two Phase 3 studies.
Summary of All Adverse Events Reported in ≥ 1% of Patients
in the Combined Active Treatment and Vehicle Groups – Pooled Phase 3 Studies
| 9721 and 9722 Combined | ||||||||||
| Adverse Event | Active One Week |
Active Two Week |
Active Four Week |
ALL Active Treatments |
Vehicle Treatments |
|||||
| N=85 | N=87 | N=85 | N=257 | N=127 | ||||||
| n | (%) | n | (%) | n | (%) | n | (%) | n | (%) | |
| BODY AS A WHOLE | 7 | (8.2) | 6 | (6.9) | 12 | (14.1) | 25 | (9.7) | 15 | (11.8) |
| Headache | 3 | (3.5) | 2 | (2.3) | 3 | (3.5) | 8 | (3.1) | 3 | (2.4) |
| Common Cold | 4 | (4.7) | 0 | 2 | (2.4) | 6 | (2.3) | 3 | (2.4) | |
| Allergy | 0 | 2 | (2.3) | 1 | (1.2) | 3 | (1.2) | 2 | (1.6) | |
| Infection Upper Respiratory | 0 | 0 | 0 | 0 | 2 | (1.6) | ||||
| MUSCULOSKELETAL | 1 | (1.2) | 1 | (1.1) | 1 | (1.2) | 3 | (1.2) | 5 | (3.9) |
| Muscle Soreness | 0 | 0 | 0 | 0 | 2 | (1.6) | ||||
| RESPIRATORY | 5 | (5.9) | 0 | 1 | (1.2) | 6 | (2.3) | 6 | (4.7) | |
| Sinusitis | 4 | (4.7) | 0 | 0 | 4 | (1.6) | 2 | (1.6) | ||
| SKIN & APPENDAGES | 78 | (91.8) | 83 | (95.4) | 82 | (96.5) | 243 | (94.6) | 85 | (66.9) |
| Application Site | 78 | (91.8) | 83 | (95.4) | 82 | (96.5) | 243 | (94.6) | 83 | (65.4) |
| Reaction | ||||||||||
| Irritation Skin | 1 | (1.2) | 0 | 2 | (2.4) | 3 | (1.2) | 0 | ||
| SPECIAL SENSES | 6 | (7.1) | 4 | (4.6) | 6 | (7.1) | 16 | (6.2) | 6 | (4.7) |
| Eye Irritation | 5 | (5.9) | 3 | (3.4) | 6 | (7.1) | 14 | (5.4) | 3 | (2.4) |
In the Phase 3 studies, no serious adverse event was considered related to study drug. A total of five patients, three in the active treatment groups and two in the vehicle group, experienced at least one serious adverse event. Three patients died as a result of adverse event(s) considered unrelated to study drug (stomach cancer, myocardial infarction and cardiac failure).
Post-treatment clinical laboratory tests other than pregnancy tests were not performed during the Phase 3 clinical studies. Clinical laboratory tests were performed during conduct of a Phase 2 study of 104 patients and 21 patients in a Phase 1 study. No abnormal serum chemistry, hematology, or urinalysis results in these studies were considered clinically significant.
The potential for a delayed hypersensitivity reaction to fluorouracil exists. Patch testing to prove hypersensitivity may be inconclusive.
Patients should discontinue therapy with Carac if symptoms of DPD enzyme deficiency develop.
Rarely, unexpected, systemic toxicity (e.g. stomatitis, diarrhea, neutropenia, and neurotoxicity) associated with parenteral administration of fluorouracil has been attributed to deficiency of dihydropyrimidine dehydrogenase “DPD” activity. One case of life threatening systemic toxicity has been reported with the topical use of 5% fluorouracil in a patient with a complete absence of DPD enzyme activity. Symptoms included severe abdominal pain, bloody diarrhea, vomiting, fever, and chills. Physical examination revealed stomatitis, erythematous skin rash, neutropenia, thrombocytopenia, inflammation of the esophagus, stomach, and small bowel. Although this case was observed with 5% fluorouracil cream, it is unknown whether patients with profound DPD enzyme deficiency would develop systemic toxicity with lower concentrations of topically applied fluorouracil.
Applications to mucous membranes should be avoided due to the possibility of local inflammation and ulceration.
There is a possibility of increased absorption through ulcerated or inflamed skin.
Patients using Carac should receive the following information and instructions:
To rule out the presence of a frank neoplasm, a biopsy may be considered for those areas failing to respond to treatment or recurring after treatment.
Adequate long-term studies in animals to evaluate carcinogenic potential have not been conducted with fluorouracil. Studies with the active ingredient of Carac, fluorouracil, have shown positive effects in in vitro and in vivo tests for mutagenicity and on impairment of fertility in in vivo animal studies.
Fluorouracil produced morphological transformation of cells in in vitro cell transformation assays. Morphological transformation was also produced in an in vitroassay by a metabolite of fluorouracil, and the transformed cells produced malignant tumors when injected into immunosuppressed syngeneic mice. Fluorouracil has been shown to exert mutagenic activity in yeast cells, Bacillus subtilis, and Drosophila assays. In addition, fluorouracil has produced chromosome damage at concentrations of 1.0 and 2.0 mcg/mL in an in vitro hamster fibroblast assay, was positive in a microwell mouse lymphoma assay, and was positive in in vivo micronucleus assays in rats and mice following intraperitoneal administration. Some patients receiving cumulative doses of 0.24 to 1.0 g of fluorouracil parenterally have shown an increase in numerical and structural chromosome aberrations in peripheral blood lymphocytes.
Fluorouracil has been shown to impair fertility after parenteral administration in rats. Fluorouracil administered at intraperitoneal doses of 125 and 250 mg/kg has been shown to induce chromosomal aberrations and changes in chromosome organization of spermatogonia in rats. In mice, single-dose intravenous and intraperitoneal injections of fluorouracil have been reported to kill differentiated spermatogonia and spermatocytes at a dose of 500 mg/kg and produce abnormalities in spermatids at 50 mg/kg.
Actinic keratosis is not a condition seen within the pediatric population, except in association with rare genetic diseases. Carac should not be used in children. The safety and effectiveness of Carac have not been established in patients less than 18 years old.
No significant differences in safety and efficacy measures were demonstrated in patients age 65 and older compared to all other patients.
Teratogenic Effects: Pregnancy Category X: See CONTRAINDICATIONS.
It is not known whether fluorouracil is excreted in human milk. Because many drugs are excreted in human milk and because of the potential for serious adverse reactions in nursing infants from fluorouracil, a decision should be made whether to discontinue nursing or to discontinue the drug, taking into account the importance of the drug to the mother.
Last updated on RxList: 11/10/2008
Fluorouracil may cause fetal harm when administered to a pregnant woman. Fluorouracil is contraindicated in women who are or may become pregnant. If this drug is used during pregnancy, or if the patient becomes pregnant while taking this drug, the patient should be apprised of the potential hazard to the fetus.
No adequate and well-controlled studies have been conducted in pregnant women with either topical or parenteral forms of fluorouracil. One birth defect (ventricular septal defect) and cases of miscarriage have been reported when fluorouracil was applied to mucous membrane areas. Multiple birth defects have been reported in the fetus of a patient treated with intravenous fluorouracil.
Animal reproduction studies have not been conducted with Carac. Fluorouracil, the active ingredient, has been shown to be teratogenic in mice, rats, and hamsters when administered parenterally at doses greater than or equal to 10, 15 and 33 mg/kg/day, respectively, [4X, 11X and 20X, respectively, the Maximum Recommended Human Dose (MRHD) based on body surface area (BSA)]. Fluorouracil was administered during the period of organogenesis for each species. Embryolethal effects occurred in monkeys at parenteral doses greater than 40 mg/kg/day (65X the MRHD based on BSA) administered during the period of organogenesis.
Carac should not be used in patients with dihydropyrimidine dehydrogenase (DPD) enzyme deficiency. A large percentage of fluorouracil is catabolized by the enzyme dihydropyrimidine dehydrogenase (DPD). DPD enzyme deficiency can result in shunting of fluorouracil to the anabolic pathway, leading to cytotoxic activity and potential toxicities.
Carac is contraindicated in patients with known hypersensitivity to any of its components.
Last updated on RxList: 11/10/2008
There is evidence that the metabolism of fluorouracil in the anabolic pathway blocks the methylation reaction of deoxyuridylic acid to thymidylic acid. In this manner, fluorouracil interferes with the synthesis of deoxyribonucleic acid (DNA) and to a lesser extent inhibits the formation of ribonucleic acid (RNA). Since DNA and RNA are essential for cell division and growth, the effect of fluorouracil may be to create a thymine deficiency that provokes unbalanced growth and death of the cell. The effects of DNA and RNA deprivation are most marked on those cells that grow more rapidly and take up fluorouracil at a more rapid rate. The contribution to efficacy or safety of individual components of the vehicle has not been established.
A multiple-dose, randomized, open-label, parallel study was performed in 21 patients with actinic keratoses. Twenty patients had pharmacokinetic samples collected: 10 patients treated with Carac and 10 treated with Efudex®‡‡ 5% Cream. Patients were treated for a maximum of 28 days with Carac, 1 g once daily in the morning; or Efudex® 5% Cream, 1 g twice daily, in the morning and evening. Steady-state plasma concentrations and the amounts of fluorouracil in urine resulting from the topical application of either product were measured.
Three patients who received Carac and nine patients who received Efudex® 5% Cream had measurable plasma fluorouracil levels; however, only one patient receiving Carac and six patients receiving Efudex® 5%Cream had a sufficient number of data points to calculate mean pharmacokinetic parameters.
Plasma Pharmacokinetic Summary
| PK Parameter | Carac n=1 |
Efudex (Mean ± SD) n=6 |
| Cmax | 0.77 ng/mL | 11.49 ± 8.24 ng/ml |
| Tmax | 1.00 hr | 1.03 ± 0.028 hr |
| AUC (0-24) | 2.80 ng•hr/ml | 22.39 ± 7.89 ng.hr/ml |
Five of 10 patients receiving Carac and nine of 10 patients receiving Efudex® 5% Cream had measurable urine fluorouracil levels.
Urine Pharmacokinetic Summary
| PK Parameter | Carac (Mean ± SD) (Range) n=10 |
Efudex (Mean ± SD) (Range) n=10 |
| Cum Ae† (min-max) |
2.74 ± 5.22 mcg (0-15.02) |
119.83 ± 94.80 mcg (0-329.87) |
| Max excretion rate (min-max) |
0.19 ± 0.52 mcg/hr (0-1.67) |
40.27 ± 47.14 mcg/hr (0-164.5) |
| † Cumulative urinary excretion | ||
Both Carac and Efudex® 5% Cream demonstrated low measurable plasma concentrations for fluorouracil when administered under steady-state conditions. Cumulative urinary excretion of fluorouracil was low for Carac and for Efudex®, corresponding to 0.055% and 0.24% of the applied doses, respectively.
Under the experimental conditions of the topical safety studies, Carac was not observed to cause contact sensitization. However, approximately 95% of subjects in the active arms of the Phase 3 clinical studies experienced facial irritation. Irritation is likely and sensitization is unlikely based on the results of the topical safety and Phase 3 studies.
Two Phase 3 identically designed, multi-center, vehicle-controlled, double-blind studies were conducted to evaluate the clinical safety and efficacy of Carac. Patients with 5 or more actinic keratoses (AKs) on the face or anterior bald scalp were randomly allocated to active or vehicle treatment in a 2:1 ratio. Patients were randomly allocated to treatment durations of 1, 2, or 4 weeks in a 1:1:1 ratio. They applied the study cream once daily to the entire face/anterior bald scalp. Each patient's clinical response was evaluated 4 weeks after the patient's last scheduled application of study cream. No additional post-treatment follow-up efficacy or safety assessments were performed beyond 4 weeks after the last scheduled application. The following graphs show the percentage of patients in whom 100% of treated lesions cleared, and the percentage of patients in whom 75% or more of treated lesions cleared. Treatment with Carac cream for 1, 2, or 4 weeks is compared to treatment with vehicle cream. Outcomes from 1, 2, and 4 weeks of treatment with vehicle cream are pooled because duration of treatment with vehicle had no substantive effect on clearance. Results from the two Phase 3 studies are shown separately. Although all treatment regimens of Carac studied demonstrated efficacy over vehicle for the treatment of actinic keratosis, continuing treatment up to 4 weeks as tolerated results in further lesion reduction and clearing.
Percentage of Subjects with 100% Clearance
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Percentage of Subjects with at Least 75% Clearance
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Clinical efficacy and safety in the treatment of AKs on the ears and other sun-exposed areas were not evaluated in the studies.
Last updated on RxList: 11/10/2008
Carac® Cream, 0.5%
(fluorouracil cream)
Read this leaflet carefully before you start to use your medicine. Read the information you get every time you get more medicine. There may be new information about the drug. This leaflet does not take the place of talks with your doctor. If you have any questions or are not sure about something, ask your doctor or pharmacist.
What is Carac?
Carac (Care ack) is a cream used by adults to treat skin conditions on the face and front part of the scalp called solar keratosis or actinic keratosis.
Who should not use Carac?
Do not use Carac
Tell your doctor if you are able to become pregnant. Your doctor may advise you about birth control to avoid pregnancy.
How should I use Carac?
Use Carac once a day as instructed by your doctor. Use it only on your skin. You should use Carac for up to 4 weeks.
What should I avoid while using Carac?
Avoid sunlight or other ultraviolet light (such as tanning booths) as much as possible while using Carac. Sunlight may increase your side effects. When exposed to sunlight, wear a hat and use sunscreen.
Do not cover the treated skin with a dressing.
Do not breast feed or become pregnant while using Carac. If you do become pregnant, stop using Carac and tell your doctor right away.
What are the possible side effects of Carac?
Most patients using Carac get skin reactions where the medicine is used. These reactions include redness, dryness, burning, pain, erosion (loss of the upper layer of skin), and swelling. Irritation may continue for two or more weeks after treatment is over. The treated area may become unsightly during therapy.
Some patients get eye irritation. Eye irritation might consist of burning, sensitivity, itching, stinging, and watering. If you are concerned about side effects, talk to your doctor.
A few patients have reported side effects such as stomach pain, diarrhea, vomiting, fever, or chills, possibly due to the lack of a specific enzyme, DPD, in their body. If you experience any of these symptoms, discontinue therapy immediately, and contact your doctor.
Storage information
Keep this medicine at room temperature (68-77°F/ 20-25°C). Throw away unused medicine. Keep this medicine out of the reach of children.
General advice about prescription medicines
Medicines are sometimes prescribed for conditions that are not described in patient information leaflets. Do not use it for a condition for which it was not prescribed. This medicine is for your use only. Never give it to other people. It may harm them even if their skin problem appears to be the same as yours. Do not use Carac after the expiration date on the tube.
Prescribing Information as of November 2006.
Last updated on RxList: 11/10/2008
IMPORTANT NOTE: This is a summary and does not contain all possible information about this product. For complete information about this product or your specific health needs, ask your health care professional. Always seek the advice of your health care professional if you have any questions about this product or your medical condition. This information is not intended as individual medical advice and does not substitute for the knowledge and judgment of your health care professional. This information does not contain any assurances that this product is safe, effective, or appropriate for you.
FLUOROURACIL - TOPICAL
(flewr-oh-YOUR-uh-sill)
COMMON BRAND NAME(S): Efudex, Fluoroplex
USES: This medication is used on the skin to treat pre-cancerous and cancerous skin growths. Fluorouracil belongs to a class of medications known as anti-metabolites. It works by blocking the growth of abnormal cells that cause the skin condition.
HOW TO USE: Read the Patient Information Leaflet provided by your pharmacist before you start using this medication and each time you get a refill. If you have any questions, consult your doctor or pharmacist.
Use this medication as directed by your doctor. Before you apply this medication to the skin, clean the affected area and dry well. Wait 10 minutes, then apply a small amount of medication to the affected skin, using just enough to cover the area with a thin film. Wash your hands immediately after applying this medication, even if you have used gloves.
The treated area may become unsightly during treatment and in some cases for several weeks after treatment. Do not cover the area with tight dressings or plastic bandages. Check with your doctor whether you may cover the treated area loosely with gauze.
Avoid applying this medication in or around the eyes or eyelids. Also, do not apply this medication inside the nose or mouth. If you do get the medication in these areas, rinse with plenty of water.
Use this medication exactly as prescribed. Do not stop using this medication without consulting your doctor. Do not increase your dose or use it more often than directed. Your condition will not clear faster, but side effects will be increased.
If your condition worsens or does not improve, consult your doctor or pharmacist promptly.
If any of these effects persist or worsen, contact your doctor or pharmacist promptly.
Remember that your doctor has prescribed this medication because he or she has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects.
Tell your doctor immediately if any of these rare but very serious side effects occur: stomach/abdominal pain, bloody diarrhea, vomiting, signs of infection (e.g., fever, chills, persistent sore throat), easy bruising/bleeding, mouth sores.
A very serious allergic reaction to this drug is rare. However, seek immediate medical attention if you notice any of the following symptoms: rash, itching, swelling, severe dizziness, trouble breathing.
This is not a complete list of possible side effects. If you notice other effects not listed above, contact your doctor or pharmacist.
Contact your doctor for medical advice about side effects. The following numbers do not provide medical advice, but in the US you may report side effects to the Food and Drug Administration (FDA) at 1-800-FDA-1088. In Canada, you may call Health Canada at 1-866-234-2345.
PRECAUTIONS: Before using fluorouracil, tell your doctor or pharmacist if you are allergic to it; or if you have any other allergies.
This medication should not be used if you have certain medical conditions. Before using this medicine, consult your doctor or pharmacist if you have: a certain enzyme deficiency (dihydropyrimidine dehydrogenase - DPD).
Before using this medication, tell your doctor or pharmacist your medical history, especially of: red/irritated/infected/open sores on skin.
This medication may make you more sensitive to the sun. Avoid prolonged sun exposure, tanning booths, and sunlamps. Use a sunscreen and wear protective clothing when outdoors. After using fluorouracil cream, wait 2 hours before applying sunscreen or moisturizer to the treated area. Do not use other skin products including creams, lotions, medications, or cosmetics unless instructed by your doctor to do so.
This medication must not be used during pregnancy. It may harm an unborn baby. If you become pregnant or think you may be pregnant, inform your doctor immediately. Consult your doctor for more details and to discuss reliable forms of birth control.
It is not known if this medication passes into breast milk. Due to the potential risk to a nursing infant, breast-feeding is not recommended while using this drug. Consult your doctor before breast-feeding.
Before using this medication, tell your doctor or pharmacist of all prescription and nonprescription/herbal products you may use.
Keep a list of all your medications with you, and share the list with your doctor and pharmacist.
OVERDOSE: This medicine may be harmful if swallowed. If overdose or swallowing is suspected, contact your local poison control center or emergency room immediately. US residents can call the US National Poison Hotline at 1-800-222-1222. Canada residents can call a provincial poison control center.
NOTES: Do not share this medication with others.
This medication must be used under close medical supervision. Be sure to keep all your medical appointments so your doctor can monitor your progress or any side effects.
Discard any unused medication when the treatment is finished. Do not use it for any other skin conditions unless directed to do so by your doctor.
There are different brands and forms of this medication available. Not all have identical effects. Do not change brands or forms without consulting your doctor or pharmacist.
MISSED DOSE: If you miss a dose, use it as soon as you remember. If it is near the time of the next dose, skip the missed dose and resume your usual dosing schedule. Do not double the dose to catch up.
STORAGE: Store at room temperature between 68-77 degrees F (20-25 degrees C) away from light and moisture. Do not store in the bathroom. Keep all medications away from children and pets.
Do not flush medications down the toilet or pour them into a drain unless instructed to do so. Properly discard this product when it is expired or no longer needed. Consult your pharmacist or local waste disposal company for more details about how to safely discard your product.
Information last revised July 2008 Copyright(c) 2008 First DataBank, Inc.
Report Problems to the Food and Drug Administration
You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.
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