Actinic Keratosis
Aldara Cream is indicated for the topical treatment of clinically typical, nonhyperkeratotic, nonhypertrophic actinic keratoses on the face or scalp in immunocompetent adults.
Superficial Basal Cell Carcinoma
Aldara Cream is indicated for the topical treatment of biopsy-confirmed, primary superficial basal cell carcinoma (sBCC) in immunocompetent adults, with a maximum tumor diameter of 2.0 cm, located on the trunk (excluding anogenital skin), neck, or extremities (excluding hands and feet), only when surgical methods are medically less appropriate and patient follow-up can be reasonably assured.
The histological diagnosis of superficial basal cell carcinoma should be established prior to treatment, since safety and efficacy of Aldara Cream have not been established for other types of basal cell carcinomas, including nodular and morpheaform (fibrosing or sclerosing) types.
External Genital Warts
Aldara Cream is indicated for the treatment of external genital and perianal warts/condyloma acuminata in patients 12 years old or older.
Limitations of Use
Aldara Cream has been evaluated in children ages 2 to 12 years with molluscum contagiosum and these studies failed to demonstrate efficacy [see Use in Specific Populations (8.4)].
Unevaluated Populations
The safety and efficacy of Aldara Cream in immunosuppressed patients have not been established.
Aldara Cream should be used with caution in patients with pre-existing autoimmune conditions.
The efficacy and safety of Aldara Cream have not been established for patients with Basal Cell Nevus Syndrome or Xeroderma Pigmentosum.
Aldara Dosage and Administration
The application frequency for Aldara Cream is different for each indication.
Aldara is not for oral, ophthalmic, or intravaginal use.
Actinic Keratosis
Aldara Cream should be applied 2 times per week for a full 16 weeks to a defined treatment area on the face or scalp (but not both concurrently). The treatment area is defined as one contiguous area of approximately 25 cm2 (e.g., 5 cm × 5 cm) on the face (e.g. forehead or one cheek) or on the scalp. Examples of 2 times per week application schedules are Monday and Thursday, or Tuesday and Friday. Aldara Cream should be applied to the entire treatment area and rubbed in until the cream is no longer visible. No more than one packet of Aldara Cream should be applied to the contiguous treatment area at each application. Aldara Cream should be applied prior to normal sleeping hours and left on the skin for approximately 8 hours, after which time the cream should be removed by washing the area with mild soap and water. The prescriber should demonstrate the proper application technique to maximize the benefit of Aldara Cream therapy.
It is recommended that patients wash their hands before and after applying Aldara Cream. Before applying the cream, the patient should wash the treatment area with mild soap and water and allow the area to dry thoroughly (at least 10 minutes).
Contact with the eyes, lips and nostrils should be avoided.
Local skin reactions in the treatment area are common [see Adverse Reactions (6.1, 6.5)]. A rest period of several days may be taken if required by the patient's discomfort or severity of the local skin reaction. However, the treatment period should not be extended beyond 16 weeks due to missed doses or rest periods. Response to treatment cannot be adequately assessed until resolution of local skin reactions. Lesions that do not respond to treatment should be carefully re-evaluated and management reconsidered.
Aldara Cream is packaged in single-use packets, with 12 packets supplied per box. Patients should be prescribed no more than 36 packets for the 16-week treatment period. Unused packets should be discarded. Partially-used packets should be discarded and not reused.
Superficial Basal Cell Carcinoma
Aldara Cream should be applied 5 times per week for a full 6 weeks to a biopsy-confirmed superficial basal cell carcinoma. An example of a 5 times per week application schedule is to apply Aldara Cream, once per day, Monday through Friday. Aldara Cream should be applied prior to normal sleeping hours and left on the skin for approximately 8 hours, after which time the cream should be removed by washing the area with mild soap and water. The prescriber should demonstrate the proper application technique to maximize the benefit of Aldara Cream therapy.
It is recommended that patients wash their hands before and after applying Aldara Cream. The patient should wash the treatment area with mild soap and water before applying the cream, and allow the area to dry thoroughly.
The target tumor should have a maximum diameter of 2 cm and be located on the trunk (excluding anogenital skin), neck, or extremities (excluding hands and feet). The treatment area should include a 1 cm margin of skin around the tumor. Sufficient cream should be applied to cover the treatment area, including 1 centimeter of skin surrounding the tumor. Aldara Cream should be rubbed into the treatment area until the cream is no longer visible.
Table 1. Amount of Aldara Cream to Use for sBCC
| Target Tumor Diameter |
Size of Cream Droplet to be
Used (diameter) |
Approximate Amount of
Aldara to be Used |
|---|
| 0.5 to < 1.0 cm |
4 mm |
10 mg |
| ≥ 1.0 to < 1.5 cm |
5 mm |
25 mg |
| ≥ 1.5 to 2.0 cm |
7 mm |
40 mg |
Contact with the eyes, lips and nostrils should be avoided.
Local skin reactions in the treatment area are common [see Adverse Reactions (6.2, 6.5)]. A rest period of several days may be taken if required by the patient's discomfort or severity of the local skin reaction.
Early clinical clearance cannot be adequately assessed until resolution of local skin reactions (e.g. 12 weeks post-treatment). Local skin reactions or other findings (e.g. infection) may require that a patient be seen sooner than the post-treatment assessment for clinical clearance. If there is clinical evidence of persistent tumor at the post-treatment assessment for clinical clearance, a biopsy or other alternative intervention should be considered. Lesions that do not respond to therapy should be carefully re-evaluated and management reconsidered; the safety and efficacy of a repeat course of Aldara Cream treatment have not been established. If any suspicious lesion arises in the treatment area at any time after a determination of clinical clearance, the patient should seek a medical evaluation [see Clinical Studies (14.2)].
Aldara Cream is packaged in single-use packets, with 12 packets supplied per box. Patients should be prescribed no more than 36 packets for the 6-week treatment period. Unused packets should be discarded. Partially-used packets should be discarded and not reused.
External Genital Warts
Aldara Cream should be applied 3 times per week to external genital/perianal warts. Aldara Cream treatment should continue until there is total clearance of the genital/perianal warts or for a maximum of 16 weeks. Examples of 3 times per week application schedules are: Monday, Wednesday, Friday or Tuesday, Thursday, Saturday. Aldara Cream should be applied prior to normal sleeping hours and left on the skin for 6 –10 hours, after which time the cream should be removed by washing the area with mild soap and water. The prescriber should demonstrate the proper application technique to maximize the benefit of Aldara Cream therapy.
It is recommended that patients wash their hands before and after applying Aldara Cream.
A thin layer of Aldara Cream should be applied to the wart area and rubbed in until the cream is no longer visible. The application site should not be occluded. Following the treatment period the cream should be removed by washing the treated area with mild soap and water.
Local skin reactions at the treatment site are common [see Adverse Reactions (6.3, 6.5)]. A rest period of several days may be taken if required by the patient's discomfort or severity of the local skin reaction. Treatment may resume once the reaction subsides. Non-occlusive dressings such as cotton gauze or cotton underwear may be used in the management of skin reactions.
Aldara Cream is packaged in single-use packets which contain sufficient cream to cover a wart area of up to 20 cm2; use of excessive amounts of cream should be avoided.
Dosage Forms and Strengths
Aldara (imiquimod) Cream, 5%, is supplied in single-use packets each of which contains 250 mg of the cream, equivalent to 12.5 mg of imiquimod. Aldara Cream is supplied in boxes of 12 packets each.
Contraindications
None.
Warnings and Precautions
Local Inflammatory Reactions
Intense local inflammatory reactions including skin weeping or erosion can occur after few applications of Aldara Cream and may require an interruption of dosing [see Dosage and Administration (2) and Adverse Reactions (6)]. Aldara Cream has the potential to exacerbate inflammatory conditions of the skin, including chronic graft versus host disease.
Severe local inflammatory reactions of the female external genitalia can lead to severe vulvar swelling.
Severe vulvar swelling can lead to urinary retention. Dosing should be interrupted or discontinued for severe vulvar swelling.
Administration of Aldara Cream is not recommended until the skin is completely healed from any previous drug or surgical treatment.
Systemic Reactions
Flu-like signs and symptoms may accompany, or even precede, local inflammatory reactions and may include malaise, fever, nausea, myalgias and rigors. An interruption of dosing should be considered [see Adverse Reactions (6)].
Ultraviolet Light Exposure
Exposure to sunlight (including sunlamps) should be avoided or minimized during use of Aldara Cream because of concern for heightened sunburn susceptibility. Patients should be warned to use protective clothing (e.g., a hat) when using Aldara Cream. Patients with sunburn should be advised not to use Aldara Cream until fully recovered. Patients who may have considerable sun exposure, e.g. due to their occupation, and those patients with inherent sensitivity to sunlight should exercise caution when using Aldara Cream.
Aldara Cream shortened the time to skin tumor formation in an animal photoco-carcinogenicity study [see Nonclinical Toxicology (13.1)]. The enhancement of ultraviolet carcinogenicity is not necessarily dependent on phototoxic mechanisms. Therefore, patients should minimize or avoid natural or artificial sunlight exposure.
Unevaluated Uses: Actinic Keratosis
Safety and efficacy have not been established for Aldara Cream in the treatment of actinic keratosis with repeated use, i.e. more than one treatment course, in the same area.
The safety of Aldara Cream applied to areas of skin greater than 25 cm2 (e.g. 5 cm × 5 cm) for the treatment of actinic keratosis has not been established [see Clinical Pharmacology (12.3)].
Unevaluated Uses: Superficial Basal Cell Carcinoma
The safety and efficacy of Aldara Cream have not been established for other types of basal cell carcinomas (BCC), including nodular and morpheaform (fibrosing or sclerosing) types. Aldara Cream is not recommended for treatment of BCC subtypes other than the superficial variant (i.e., sBCC). Patients with sBCC treated with Aldara Cream should have regular follow-up of the treatment site [see Clinical Studies (14.2)].
The safety and efficacy of treating sBCC lesions on the face, head and anogenital area have not been established.
Unevaluated Uses: External Genital Warts
Aldara Cream has not been evaluated for the treatment of urethral, intra-vaginal, cervical, rectal, or intra-anal human papilloma viral disease.
Adverse Reactions
Because clinical trials are conducted under widely varying conditions, adverse reaction rates observed in the clinical trials of a drug cannot be directly compared to rates in the clinical trials of another drug and may not reflect the rates observed in practice.
Clinical Trials Experience: Actinic Keratosis
The data described below reflect exposure to Aldara Cream or vehicle in 436 subjects enrolled in two double-blind, vehicle-controlled studies. Subjects applied Aldara Cream or vehicle to a 25 cm2 contiguous treatment area on the face or scalp 2 times per week for 16 weeks.
Table 2: Selected Adverse Reactions Occurring in > 1% of Aldara-Treated Subjects and at a Greater Frequency than with Vehicle in the Combined Studies (Actinic Keratosis)
| Preferred Term |
Aldara Cream
(n=215) |
Vehicle
(n=221) |
|---|
| Application Site Reaction |
71 (33%) |
32 (14%) |
| Upper Resp Tract Infection |
33 (15%) |
27 (12%) |
| Sinusitis |
16 (7%) |
14 (6%) |
| Headache |
11 (5%) |
7 (3%) |
| Carcinoma Squamous |
8 (4%) |
5 (2%) |
| Diarrhea |
6 (3%) |
2 (1%) |
| Eczema |
4 (2%) |
3 (1%) |
| Back Pain |
3 (1%) |
2 (1%) |
| Fatigue |
3 (1%) |
2 (1%) |
| Fibrillation Atrial |
3 (1%) |
2 (1%) |
| Infection Viral |
3 (1%) |
2 (1%) |
| Dizziness |
3 (1%) |
1 (<1%) |
| Vomiting |
3 (1%) |
1 (<1%) |
| Urinary Tract Infection |
3 (1%) |
1 (<1%) |
| Fever |
3 (1%) |
0 (0%) |
| Rigors |
3 (1%) |
0 (0%) |
| Alopecia |
3 (1%) |
0 (0%) |
Table 3: Application Site Reactions Reported by > 1% of Aldara-Treated Subjects and at a Greater Frequency than with Vehicle in the Combined Studies (Actinic Keratosis)
| Included Term |
Aldara Cream
n=215 |
Vehicle
n=221 |
|---|
| Itching |
44 (20%) |
17 (8%) |
| Burning |
13 (6%) |
4 (2%) |
| Bleeding |
7 (3%) |
1 (<1%) |
| Stinging |
6 (3%) |
2 (1%) |
| Pain |
6 (3%) |
2 (1%) |
| Induration |
5 (2%) |
3 (1%) |
| Tenderness |
4 (2%) |
3 (1%) |
| Irritation |
4 (2%) |
0 (0%) |
Local skin reactions were collected independently of the adverse reaction "application site reaction" in an effort to provide a better picture of the specific types of local reactions that might be seen. The most frequently reported local skin reactions were erythema, flaking/scaling/dryness, and scabbing/crusting. The prevalence and severity of local skin reactions that occurred during controlled studies are shown in the following table.
Table 4: Local Skin Reactions in the Treatment Area as Assessed by the Investigator (Actinic Keratosis)
|
Aldara Cream
(n=215) |
Vehicle
(n=220) |
|---|
|
All Grades |
Severe |
All Grades* |
Severe |
|---|
|
| Erythema |
209 (97%) |
38 (18%) |
206 (93%) |
5 (2%) |
| Flaking/Scaling/Dryness |
199 (93%) |
16 (7%) |
199 (91%) |
7 (3%) |
| Scabbing/Crusting |
169 (79%) |
18 (8%) |
92 (42%) |
4 (2%) |
| Edema |
106 (49%) |
0 (0%) |
22 (10%) |
0 (0%) |
| Erosion/Ulceration |
103 (48%) |
5 (2%) |
20 (9%) |
0 (0%) |
| Weeping/Exudate |
45 (22%) |
0 (0%) |
3 (1%) |
0 (0%) |
| Vesicles |
19 (9%) |
0 (0%) |
2 (1%) |
0 (0%) |
The adverse reactions that most frequently resulted in clinical intervention (e.g., rest periods, withdrawal from study) were local skin and application site reactions. Overall, in the clinical studies, 2% (5/215) of subjects discontinued for local skin/application site reactions. Of the 215 subjects treated, 35 subjects (16%) on Aldara Cream and 3 of 220 subjects (1%) on vehicle cream had at least one rest period. Of these Aldara Cream subjects, 32 (91%) resumed therapy after a rest period.
In the AK studies, 22 of 678 (3.2%) of Aldara-treated subjects developed treatment site infections that required a rest period off Aldara Cream and were treated with antibiotics (19 with oral and 3 with topical).
Of the 206 Aldara subjects with both baseline and 8-week post-treatment scarring assessments, 6 (2.9%) had a greater degree of scarring scores at 8-weeks post-treatment than at baseline.
Clinical Trials Experience: Superficial Basal Cell Carcinoma
The data described below reflect exposure to Aldara Cream or vehicle in 364 subjects enrolled in two double-blind, vehicle-controlled studies. Subjects applied Aldara Cream or vehicle 5 times per week for 6 weeks. The incidence of adverse reactions reported by > 1% of subjects during the studies is summarized below.
Table 5: Selected Adverse Reactions Reported by > 1% of Aldara-Treated Subjects and at a Greater Frequency than with Vehicle in the Combined Studies (Superficial Basal Cell Carcinoma)
| Preferred Term |
Aldara Cream
(n=185)
N % |
Vehicle
(n=179)
N % |
|---|
| Application Site Reaction |
52 (28%) |
5 (3%) |
| Headache |
14 (8%) |
4 (2%) |
| Back Pain |
7 (4%) |
1 (<1%) |
| Upper Resp Tract Infection |
6 (3%) |
2 (1%) |
| Rhinitis |
5 (3%) |
1 (<1%) |
| Lymphadenopathy |
5 (3%) |
1 (<1%) |
| Fatigue |
4 (2%) |
2 (1%) |
| Sinusitis |
4 (2%) |
1 (<1%) |
| Dyspepsia |
3 (2%) |
2 (1%) |
| Coughing |
3 (2%) |
1 (<1%) |
| Fever |
3 (2%) |
0 (0%) |
| Dizziness |
2 (1%) |
1 (<1%) |
| Anxiety |
2 (1%) |
1 (<1%) |
| Pharyngitis |
2 (1%) |
1 (<1%) |
| Chest Pain |
2 (1%) |
0 (0%) |
| Nausea |
2 (1%) |
0 (0%) |
The most frequently reported adverse reactions were local skin and application site reactions including erythema, edema, induration, erosion, flaking/scaling, scabbing/crusting, itching and burning at the application site. The incidence of application site reactions reported by > 1% of the subjects during the 6 week treatment period is summarized in the table below.
Table 6: Application Site Reactions Reported by > 1% of Aldara-Treated Subjects and at a Greater Frequency than with Vehicle in the Combined Studies (Superficial Basal Cell Carcinoma)
| Included Term |
Aldara Cream
n=185 |
Vehicle
n=179 |
|---|
| Itching |
30 (16%) |
1 (1%) |
| Burning |
11 (6%) |
2 (1%) |
| Pain |
6 (3%) |
0 (0%) |
| Bleeding |
4 (2%) |
0 (0%) |
| Erythema |
3 (2%) |
0 (0%) |
| Papule(s) |
3 (2%) |
0 (0%) |
| Tenderness |
2 (1%) |
0 (0%) |
| Infection |
2 (1%) |
0 (0%) |
Local skin reactions were collected independently of the adverse reaction "application site reaction" in an effort to provide a better picture of the specific types of local reactions that might be seen. The prevalence and severity of local skin reactions that occurred during controlled studies are shown in the following table.
Table 7: Local Skin Reactions in the Treatment Area as Assessed by the Investigator (Superficial Basal Cell Carcinoma)
|
Aldara Cream
n=184 |
Vehicle
n=178 |
|---|
|
All Grades |
Severe |
All Grades* |
Severe |
|---|
|
| Erythema |
184 (100%) |
57 (31%) |
173 (97%) |
4 (2%) |
| Flaking/Scaling |
167 (91%) |
7 (4%) |
135 (76%) |
0 (0%) |
| Induration |
154 (84%) |
11 (6%) |
94 (53%) |
0 (0%) |
| Scabbing/Crusting |
152 (83%) |
35 (19%) |
61 (34%) |
0 (0%) |
| Edema |
143 (78%) |
13 (7%) |
64 (36%) |
0 (0%) |
| Erosion |
122 (66%) |
23 (13%) |
25 (14%) |
0 (0%) |
| Ulceration |
73 (40%) |
11 (6%) |
6 (3%) |
0 (0%) |
| Vesicles |
57 (31%) |
3 (2%) |
4 (2%) |
0 (0%) |
The adverse reactions that most frequently resulted in clinical intervention (e.g., rest periods, withdrawal from study) were local skin and application site reactions; 10% (19/185) of subjects received rest periods. The average number of doses not received per subject due to rest periods was 7 doses with a range of 2 to 22 doses; 79% of subjects (15/19) resumed therapy after a rest period. Overall, in the clinical studies, 2% (4/185) of subjects discontinued for local skin/application site reactions.
In the sBCC studies, 17 of 1266 (1.3%) Aldara-treated subjects developed treatment site infections that required a rest period and treatment with antibiotics.
Clinical Trials Experience: External Genital Warts
In controlled clinical trials for genital warts, the most frequently reported adverse reactions were local skin and application site reactions.
Some subjects also reported systemic reactions. Overall, 1.2% (4/327) of the subjects discontinued due to local skin/application site reactions. The incidence and severity of local skin reactions during controlled clinical trials are shown in the following table.
Table 8: Local Skin Reactions in the Treatment Area as Assessed by the Investigator (External Genital Warts)
|
Aldara Cream |
Vehicle |
|---|
|
Females
n=114 |
Males
n=156 |
Females
n=99 |
Males
n=157 |
|---|
|
All Grades |
Severe |
All Grades* |
Severe |
All Grades* |
Severe |
All Grades* |
Severe |
|---|
|
| Erythema |
74 (65%) |
4 (4%) |
90 (58%) |
6 (4%) |
21 (21%) |
0 (0%) |
34 (22%) |
0 (0%) |
| Erosion |
35 (31%) |
1 (1%) |
47 (30%) |
2 (1%) |
8 (8%) |
0 (0%) |
10 (6%) |
0 (0%) |
Excoriation/
Flaking |
21 (18%) |
0 (0%) |
40 (26%) |
1 (1%) |
8 (8%) |
0 (0%) |
12 (8%) |
0 (0%) |
| Edema |
20 (18%) |
1 (1%) |
19 (12%) |
0 (0%) |
5 (5%) |
0 (0%) |
1 (1%) |
0 (0%) |
| Scabbing |
4 (4%) |
0 (0%) |
20 (13%) |
0 (0%) |
0 (0%) |
0 (0%) |
4 (3%) |
0 (0%) |
| Induration |
6 (5%) |
0 (0%) |
11 (7%) |
0 (0%) |
2 (2%) |
0 (0%) |
3 (2%) |
0 (0%) |
| Ulceration |
9 (8%) |
3 (3%) |
7 (4%) |
0 (0%) |
1 (1%) |
0 (0%) |
1 (1%) |
0 (0%) |
| Vesicles |
3 (3%) |
0 (0%) |
3 (2%) |
0 (0%) |
0 (0%) |
0 (0%) |
0 (0%) |
0 (0%) |
Remote site skin reactions were also reported. The severe remote site skin reactions reported for females were erythema (3%), ulceration (2%), and edema (1%); and for males, erosion (2%), and erythema, edema, induration, and excoriation/flaking (each 1%).
Selected adverse reactions judged to be probably or possibly related to Aldara Cream are listed below.
Table 9: Selected Treatment Related Reactions (External Genital Warts)
|
Females |
Males |
|---|
|
Aldara Cream
n=117 |
Vehicle
n=103 |
Aldara Cream
n=156 |
Vehicle
n=158 |
|---|
|
| Application Site Disorders: |
|
|
|
|
| Application Site Reactions |
|
|
|
|
| Wart Site: |
|
|
|
|
| Itching |
38 (32%) |
21 (20%) |
34 (22%) |
16 (10%) |
| Burning |
30 (26%) |
12 (12%) |
14 (9%) |
8 (5%) |
| Pain |
9 (8%) |
2 (2%) |
3 (2%) |
1 (1%) |
| Soreness |
3 (3%) |
0 (0%) |
0 (0%) |
1 (1%) |
| Fungal Infection |
13 (11%) |
3 (3%) |
3 (2%) |
1 (1%) |
| Systemic Reactions: |
|
|
|
|
| Headache |
5 (4%) |
3 (3%) |
8 (5%) |
3 (2%) |
| Influenza-like symptoms |
4 (3%) |
2 (2%) |
2 (1%) |
0 (0%) |
| Myalgia |
1 (1%) |
0 (0%) |
2 (1%) |
1 (1%) |
Adverse reactions judged to be possibly or probably related to Aldara Cream and reported by more than 1% of subjects included:
Application Site Disorders: burning, hypopigmentation, irritation, itching, pain, rash, sensitivity, soreness, stinging, tenderness.
Remote Site Reactions: bleeding, burning, itching, pain, tenderness, tinea cruris.
Body as a Whole: fatigue, fever, influenza-like symptoms.
Central and Peripheral Nervous System Disorders: headache.
Gastro-Intestinal System Disorders: diarrhea.
Musculo-Skeletal System Disorders: myalgia.
Clinical Trials Experience: Dermal Safety Studies
Provocative repeat insult patch test studies involving induction and challenge phases produced no evidence that Aldara Cream causes photoallergenicity or contact sensitization in healthy skin; however, cumulative irritancy testing revealed the potential for Aldara Cream to cause irritation, and application site reactions were reported in the clinical studies [see Adverse Reactions (6)].
Postmarketing Experience
The following adverse reactions have been identified during post-approval use of Aldara Cream. Because these reactions are reported voluntarily from a population of uncertain size, it is not always possible to reliably estimate their frequency or establish a causal relationship to drug exposure.
Application Site Disorders: tingling at the application site.
Body as a Whole: angioedema.
Cardiovascular: capillary leak syndrome, cardiac failure, cardiomyopathy, pulmonary edema, arrhythmias (tachycardia, atrial fibrillation, palpitations), chest pain, ischemia, myocardial infarction, syncope.
Endocrine: thyroiditis.
Gastro-Intestinal System Disorders: abdominal pain.
Hematological: decreases in red cell, white cell and platelet counts (including idiopathic thrombocytopenic purpura), lymphoma.
Hepatic: abnormal liver function.
Infections and Infestations: herpes simplex.
Musculo-Skeletal System Disorders: arthralgia.
Neuropsychiatric: agitation, cerebrovascular accident, convulsions (including febrile convulsions), depression, insomnia, multiple sclerosis aggravation, paresis, suicide.
Respiratory: dyspnea.
Urinary System Disorders: proteinuria, dysuria, urinary retention.
Skin and Appendages: exfoliative dermatitis, erythema multiforme, hyperpigmentation, hypertrophic scar.
Vascular: Henoch-Schonlein purpura syndrome.
USE IN SPECIFIC POPULATIONS
Pregnancy
Pregnancy Category C:
Note: The Maximum Recommended Human Dose (MRHD) was set at 2 packets per treatment of Aldara Cream (25 mg imiquimod) for the animal multiple of human exposure ratios presented in this label. If higher doses than 2 packets of Aldara Cream are used clinically, then the animal multiple of human exposure would be reduced for that dose. A non-proportional increase in systemic exposure with increased dose of Aldara Cream was noted in the clinical pharmacokinetic study conducted in actinic keratosis subjects [see Clinical Pharmacology (12.3)]. The AUC after topical application of 6 packets of Aldara Cream was 8 fold greater than the AUC after topical application of 2 packets of Aldara Cream in actinic keratosis subjects. Therefore, if a dose of 6 packets per treatment of Aldara Cream was topically administered to an individual, then the animal multiple of human exposure would be either 1/3 of the value provided in the label (based on body surface area comparisons) or 1/8 of the value provided in the label (based on AUC comparisons). The animal multiples of human exposure calculations were based on weekly dose comparisons for the carcinogenicity studies described in this label. The animal multiples of human exposure calculations were based on daily dose comparisons for the reproductive toxicology studies described in this label.
Systemic embryofetal development studies were conducted in rats and rabbits. Oral doses of 1, 5 and 20 mg/kg/day imiquimod were administered during the period of organogenesis (gestational days 6–15) to pregnant female rats. In the presence of maternal toxicity, fetal effects noted at 20 mg/kg/day (577× MRHD based on AUC comparisons) included increased resorptions, decreased fetal body weights, delays in skeletal ossification, bent limb bones, and two fetuses in one litter (2 of 1567 fetuses) demonstrated exencephaly, protruding tongues and low-set ears. No treatment related effects on embryofetal toxicity or teratogenicity were noted at 5 mg/kg/day (98× MRHD based on AUC comparisons).
Intravenous doses of 0.5, 1 and 2 mg/kg/day imiquimod were administered during the period of organogenesis (gestational days 6–18) to pregnant female rabbits. No treatment related effects on embryofetal toxicity or teratogenicity were noted at 2 mg/kg/day (1.5× MRHD based on BSA comparisons), the highest dose evaluated in this study, or 1 mg/kg/day (407× MRHD based on AUC comparisons).
A combined fertility and peri- and post-natal development study was conducted in rats. Oral doses of 1, 1.5, 3 and 6 mg/kg/day imiquimod were administered to male rats from 70 days prior to mating through the mating period and to female rats from 14 days prior to mating through parturition and lactation. No effects on growth, fertility, reproduction or post-natal development were noted at doses up to 6 mg/kg/day (87× MRHD based on AUC comparisons), the highest dose evaluated in this study. In the absence of maternal toxicity, bent lim