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Isopropanol

AEMPS

Skin antiseptic and disinfectant

ATC code: D08AX05

Brand names: ChloraPrep

Updated · Methodology

Indications

B

Antiseptic skin and mucosal decontamination

First line

Isopropanol with chlorhexidine is the standard for preparing skin before an invasive procedure: catheter insertion, venipuncture, biopsy, surgery. The AEMPS ficha técnica even describes the choice of applicator: 1 ml covers an 8 by 10 cm area for a peripheral cannula, venipuncture and a simple biopsy, with larger applicators for bigger fields. The point of the pair is that the alcohol acts instantly while chlorhexidine stays on the skin and keeps working for hours. The 2009 hand hygiene guidelines describe the same logic for healthcare workers' hands. Two warnings matter more than the rest: the solution is flammable and must dry completely before an electrosurgical unit or laser is used, and in preterm infants, especially before 32 weeks and in the first two weeks of life, alcohol solutions cause chemical burns.

Sources

  1. AEMPS: Ficha técnica de alcohol isopropilico (2023)
  2. WHO: WHO Guidelines on Hand Hygiene in Health Care (2009)

Marketing claims without evidence base

The drug is promoted for these uses outside international guidelines. Each entry below is analyzed against AEMPS, FDA, EMA, Cochrane and major RCTs.

D

Wound healing support

Not recommended

An alcohol antiseptic is meant for intact skin and is not poured into a wound. The AEMPS ficha técnica limits use to external application on the skin and forbids swallowing, while open surfaces are not part of the indication. The mechanism is the same as with ethanol: protein denaturation proceeds indiscriminately, both microbes and wound edge cells suffer, and healing gets no faster. The order for a fresh wound is simple: rinse with running water or saline, remove dirt, treat the surrounding skin with a suitable antiseptic and cover with a dressing. Deep, bite and contaminated wounds, and wounds with gaping edges, are managed by a doctor, who also checks tetanus vaccination. If an alcohol solution is advised to be poured straight into the wound, consider seeking a second opinion.

Sources

  1. AEMPS: Ficha técnica de alcohol isopropilico (2023)

ICD-10: T14.1 · ICD-11: ND56.1

F

Local burn and damaged-skin care

Not recommended

Alcohol on a burn is one of the commonest household mistakes. Burned skin has lost its protective barrier, alcohol penetrates deeper, intensifies pain and damages tissue, and as it evaporates it dries the surface further. The AEMPS ficha técnica does not include burns among the indications and asks to avoid application to damaged skin and mucous membranes. First aid for a burn looks different: cooling under running water at room temperature for 20 minutes, removing rings and jewellery, a clean non-adherent dressing. Ice and fats are not needed either. The 2017 Cochrane review of antiseptics for burns showed that the evidence for their benefit is of low and very low quality, so even suitable antiseptics play no decisive role. If alcohol was advised to be poured on a burn, consider seeking a second opinion.

Sources

  1. Cochrane: Antiseptics for burns (2017)
  2. AEMPS: Ficha técnica de alcohol isopropilico (2023)

ICD-10: T20-T32 · ICD-11: ND90-ND9Z

How to read tiers A–F
  • AStrong evidence – first or second line in international guidelines
  • BRecommended in selected cases
  • CStudy data contradict each other
  • DBenefit not proven, no documented harm
  • FDocumented harm, or risk without benefit

Mechanism of action

Isopropyl alcohol denatures microbial cell proteins and dissolves the lipids of the cell membrane. It acts on bacteria, fungi and enveloped viruses, but not on spores. Pure isopropanol is rare in a Spanish pharmacy: it comes paired with chlorhexidine, as in ChloraPrep and Cristalmina Plus, and the combination is no accident. The alcohol kills microbes in seconds but evaporates, while chlorhexidine binds to skin proteins and holds a residual effect for hours. The ficha técnica also stresses the risk of this form: the solution is flammable, and operating room fires have been described when an electrosurgical unit, laser or fibre optic light is used before the alcohol has dried. In preterm infants, especially those born before 32 weeks, alcohol antiseptics cause chemical burns.

Safety

Contraindications

  • Hypersensitivity to isopropanol, chlorhexidine or excipients
  • Swallowing
  • Contact with mucous membranes and eyes
  • Preterm newborns under 32 weeks of gestation in the first two weeks of life

Serious adverse effects

  • Operating room fire when an electrosurgical unit or laser is used before full drying
  • Chemical skin burn in preterm infants
  • Anaphylactic reactions to the chlorhexidine in the combination
  • Blisters and exfoliative dermatitis at the application site

Common adverse effects

  • Redness and irritation at the application site
  • Itching
  • Dry skin

Pregnancy: can you take Isopropanol?

No studies with this product have been done in pregnant women. External use on intact skin gives virtually no systemic absorption.

Breastfeeding: can you take Isopropanol?

No studies have been done during breastfeeding. The nipple area is not treated with alcohol antiseptics before a feed.

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Reference information, not a clinical decision. Discuss feeding pauses or changes with your physician or an IBCLC.

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Frequently asked

What is Isopropanol used for?

Isopropanol is evaluated for the following indications with varying evidence strength: Antiseptic skin and mucosal decontamination (evidence tier B), Wound healing support (evidence tier D), Local burn and damaged-skin care (evidence tier F). See the full indication matrix with dosing and citations above on this page.

What are the side effects of Isopropanol?

Common side effects of Isopropanol (≥ 1 in 100): Redness and irritation at the application site, Itching, Dry skin. See the Safety section for uncommon and serious reactions.

Is Isopropanol safe during pregnancy?

No studies with this product have been done in pregnant women. External use on intact skin gives virtually no systemic absorption.

Is Isopropanol compatible with breastfeeding?

No studies have been done during breastfeeding. The nipple area is not treated with alcohol antiseptics before a feed.

Who should not take Isopropanol?

Isopropanol is contraindicated in: Hypersensitivity to isopropanol, chlorhexidine or excipients; Swallowing; Contact with mucous membranes and eyes; Preterm newborns under 32 weeks of gestation in the first two weeks of life. Full list in the Safety section.

Official sources

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Other drugs in this group

Chlorhexidine, Ethanol, Povidone-iodine