Sinecatechins (1 brand name, 1 dosage form, 1 route)
Available dosage forms: OINTMENT.
Routes of administration: TOPICAL.
Brand Names
- VEREGEN
Contraindications
None
Warnings and Precautions
Veregen has not been evaluated for the treatment of urethral, intra-vaginal, cervical, rectal, or intra-anal human papilloma viral disease and should not be used for the treatment of these conditions. Use of Veregen on open wounds should be avoided. Patients should be advised to avoid exposure of the genital and perianal area to sun/UV-light as Veregen has not been tested under these circumstances.
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. In Phase 3 clinical trials, a total of 397 subjects received Veregen three times per day topical application for the treatment of external genital and perianal warts for up to 16 weeks. Serious local adverse events of pain and inflammation were reported in two subjects (0.5%), both women. In clinical trials, the incidence of patients with local adverse events leading to discontinuation or dose interruption (reduction) was 5% (19/397). These included the following events: application site reactions (local pain, erythema, vesicles, skin erosion/ulceration), phimosis, inguinal lymphadenitis, urethral meatal stenosis, dysuria, genital herpes simplex, vulvitis, hypersensitivity, pruritus, pyodermitis, skin ulcer, erosions in the urethral meatus, and superinfection of warts and ulcers. Local and regional reactions (including adenopathy) occurring at >1% in the treated groups are presented in Table 1. Table 1: Local and Regional Adverse Reactions During Treatment (% Subjects) Veregen® (N = 397) Vehicle (N = 207) Erythema 70 32 Pruritus 69 45 Burning 67 31 Pain/discomfort 56 14 Erosion/Ulceration 49 10 Edema 45 11 Induration 35 11 Rash vesicular 20 6 Regional Lymphadenitis 3 1 Desquamation 5 <1 Discharge 3 <1 Bleeding 2 <1 Reaction 2 0 Scar 1 0 Irritation 1 0 Rash 1 0 A total of 266/397 (67%) of subjects in the Veregen group had either a moderate or a severe reaction that was considered probably related to the drug, of which 120 (30%) subjects had a severe reaction. Severe reactions occurred in 37% (71/192) of women and in 24% (49/205) of men. The percentage of subjects with at least one severe, related adverse event was 26% (86/328) for subjects with genital warts only, 42% (19/45) in subjects with both genital an
Mechanism of Action
The mode of action of Veregen involved in the clearance of genital and perianal warts is unknown. In vitro, sinecatechins had anti-oxidative activity; the clinical significance of this finding is unknown.