CHLORAPREP ONE-STEP FREPP
Clinical safety rating: caution
Comprehensive clinical and safety monograph for CHLORAPREP ONE-STEP FREPP (CHLORAPREP ONE-STEP FREPP).
Chlorhexidine gluconate disrupts bacterial cell membranes and precipitates cell contents, providing rapid bactericidal activity. Isopropyl alcohol denatures proteins and disrupts cell membranes, enhancing antimicrobial effect.
| Metabolism | Not metabolized; primarily excreted unchanged in urine and feces. |
| Excretion | Chlorhexidine gluconate and isopropyl alcohol are not significantly absorbed systemically after topical application. For the minimal absorbed fraction, chlorhexidine is primarily excreted unchanged in feces via biliary elimination (~90%), with renal excretion accounting for <1%. Isopropyl alcohol is metabolized to acetone and excreted via lungs and urine; however, systemic absorption is negligible with intact skin. |
| Half-life | Not applicable, as systemic absorption is negligible. For absorbed chlorhexidine, terminal half-life is approximately 1-2 hours due to rapid clearance, but this is clinically irrelevant. |
| Protein binding | Minimal (<10%) due to negligible systemic absorption. Chlorhexidine is highly protein-bound (>90%) in plasma if absorbed, but this is not clinically significant. |
| Volume of Distribution | Not clinically applicable; negligible systemic absorption. If absorbed, Vd for chlorhexidine is approximately 0.5-1 L/kg, indicating extensive tissue distribution, but not relevant for topical use. |
| Bioavailability | Topical application: 0% systemic bioavailability due to minimal absorption. For any absorbed fraction, oral bioavailability is <5% (not a relevant route). |
| Onset of Action | Immediate upon application. Chlorhexidine begins reducing bacterial counts within 15-30 seconds; isopropyl alcohol provides rapid bactericidal activity within 30 seconds. Maximal antiseptic effect occurs within 2-3 minutes. |
| Duration of Action | Persistent bacteriostatic activity for up to 6 hours due to chlorhexidine binding to skin proteins. Isopropyl alcohol's immediate effect is short-lived (minutes), but the combination provides extended suppression of microbial regrowth. |
Topical antiseptic: apply to intact skin for 30 seconds and allow to dry for 30 seconds; single-use per patient.
| Dosage form | SPONGE |
| Renal impairment | No systemic absorption; no dose adjustment required for renal impairment. |
| Liver impairment | No systemic absorption; no dose adjustment required for hepatic impairment. |
| Pediatric use | Use with caution in neonates; apply to intact skin for 30 seconds and allow to dry for 30 seconds; avoid use in infants <2 months due to risk of skin irritation. |
| Geriatric use | No specific dose adjustment; apply as directed for adult topical use; monitor for skin irritation in elderly with fragile skin. |
| 1st trimester | Consult provider |
| 2nd trimester | Consult provider |
| 3rd trimester | Consult provider |
Clinical note
Comprehensive clinical and safety monograph for CHLORAPREP ONE-STEP FREPP (CHLORAPREP ONE-STEP FREPP).
| Breastfeeding | Minimal systemic absorption; no M/P ratio available. Considered compatible with breastfeeding. |
| Teratogenic Risk | No fetal risk identified; chlorhexidine gluconate and isopropyl alcohol are not systemically absorbed when applied topically. No association with teratogenicity in animal studies. |
| Fetal Monitoring | Standard maternal monitoring during use; no specific fetal monitoring required. |
■ FDA Black Box Warning
None
| Serious Effects |
["Hypersensitivity to chlorhexidine gluconate or isopropyl alcohol","Use in lumbar puncture or contact with meninges"]
| Precautions | ["Avoid contact with eyes, ears, and mouth","Do not use on open wounds or mucous membranes","Hypersensitivity reactions may occur","Do not use in patients with known allergy to chlorhexidine or isopropyl alcohol","Keep away from flames or heat sources due to alcohol content"] |
| Food/Dietary | No clinically relevant food interactions identified. |
| Clinical Pearls |
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| Fertility Effects | No known effect on fertility based on lack of systemic absorption. |
| CHLORAPREP ONE-STEP FREPP contains 2% chlorhexidine gluconate and 70% isopropyl alcohol. It requires a 30-second scrub followed by a 30-second dry time for optimal antisepsis. Avoid use on mucous membranes, eyes, or open wounds. Do not use in patients with known hypersensitivity to chlorhexidine. The solution is flammable; allow complete drying before using electrocautery or lasers. |
| Patient Advice | Do not apply to broken skin or wounds. · Avoid contact with eyes, ears, and mouth. · Allow the area to dry completely before covering or using electrical devices. · Inform your healthcare provider if you have a history of allergic reactions to antiseptics. · This product is for external use only. |