Nizral 2% Shampoo (30 ml) – Medicated Antifungal Scalp Treatment

Nizral 2% Shampoo (30 ml) is a broad-spectrum therapeutic antifungal formulation containing ketoconazole, clinically indicated for the prevention and treatment of scalp conditions driven by lipophilic yeast overgrowth, including stubborn dandruff, seborrheic dermatitis, and pityriasis capitis. It targets fungal cell membrane integrity directly, offering rapid relief from visible flaking, pruritus (itching), and scalp erythema.

What Is Nizral Shampoo 2% (30 ml)?

Nizral Shampoo contains 2% ketoconazole, a synthetic imidazole-dioxolane antimycotic agent specifically formulated to treat mycotic scalp conditions. The 30 ml bottle provides a targeted course of therapy for active flare-ups or localized scaling.

Unlike cosmetic anti-dandruff shampoos that merely wash away loose dead skin cells, Nizral addresses the underlying microbiological cause of scaling disorders: the excessive proliferation of Malassezia species (formerly known as Pityrosporum), which naturally colonize human sebum-rich areas.

Nizral 2% is formulated for episodic acute therapy to clear symptoms, followed by intermittent maintenance use to stop recurrent scaling and irritation.
([dailymed.nlm.nih.gov](https://dailymed.nlm.nih.gov/dailymed/lookup.cfm?setid=a0799f2b-7c15-46ff-b630-fcfefec96979))

How Does Nizral Shampoo Work?

Ketoconazole acts directly on the cell membrane architecture of susceptible fungal and yeast organisms through distinct biochemical steps:

• Inhibition of Ergosterol Synthesis: Ketoconazole blocks the fungal cytochrome P450 enzyme 14α-demethylase. This stops the conversion of lanosterol into ergosterol, a vital component of fungal cell membranes.
• Membrane Destabilization: The depletion of ergosterol, combined with the accumulation of toxic methylated sterol intermediates, alters membrane permeability, causing cell breakdown and fungal cell death.
• Anti-Inflammatory Action: Ketoconazole downregulates local inflammatory mediators and leukotrienes, relieving scalp erythema, burning sensations, and intense pruritus independent of its fungal clearance.

Because ketoconazole binds strongly to keratin within the hair shafts and outer stratum corneum, it provides a persistent antifungal reservoir effect even after the shampoo is rinsed away.

What Is Nizral Shampoo Used For?

Nizral 2% Shampoo is indicated for the treatment and prophylaxis of fungal scalp conditions and associated cutaneous concerns:

• Seborrheic Dermatitis: Characterized by greasy, yellowish scaling, crusting, and inflamed patches on the scalp.
• Pityriasis Capitis (Severe Dandruff): Marked shedding of white epidermal flakes accompanied by scalp itching.
• Pityriasis Versicolor (Tinea Versicolor): Topical management of superficial fungal scaling affecting the hairline, neck, or upper torso.
• Supportive Care in Fungal Folliculitis: Off-label topical management to control follicular Malassezia overgrowth that mimics persistent acne-like pustules around the hairline.

Nizral is not indicated for non-fungal scalp conditions, such as plaque psoriasis (unless complicated by fungal superinfection) or bacterial folliculitis.
([dailymed.nlm.nih.gov](https://dailymed.nlm.nih.gov/dailymed/lookup.cfm?setid=a0799f2b-7c15-46ff-b630-fcfefec96979))

Related Skin & Scalp Health Resources

Sebum overproduction and microbial imbalances often affect both the scalp and facial skin. If you are dealing with concurrent breakouts, fungal-type bumps, or skin inflammation across other body areas, explore our related clinical guides and topical formulations:

Nizral Shampoo Application Instructions

To achieve maximum therapeutic effect, follow proper contact-time instructions:

• Active Dandruff & Seborrheic Dermatitis: Apply twice weekly for 2 to 4 weeks during the acute phase.
• Maintenance & Prevention: Use once every 1 to 2 weeks to prevent recurrence of flakes and itching.
• Application Technique: Wet the hair and scalp thoroughly with warm water. Apply a sufficient amount of Nizral shampoo (about 5 to 10 ml) to produce an ample lather. Gently massage the lather across the scalp and affected skin areas.
• Contact Time: Leave the shampoo on the scalp for 3 to 5 minutes before rinsing thoroughly with clean water. Contact time allows ketoconazole to penetrate follicular units.

Regular non-medicated shampoo may be used between treatments if daily hair washing is preferred.
([dailymed.nlm.nih.gov](https://dailymed.nlm.nih.gov/dailymed/lookup.cfm?setid=a0799f2b-7c15-46ff-b630-fcfefec96979))

Nizral 2% Shampoo vs Nizral 2% Cream

Ketoconazole 2% is formulated as both a wash-off scalp shampoo and a leave-on cutaneous cream to suit different anatomical areas:

Use the shampoo for hair-bearing areas where creams leave greasy residue, and select the cream for focused application on non-hairy skin lesions.

Who Should Not Use Nizral Shampoo?

Nizral Shampoo is generally well tolerated due to minimal systemic absorption, but it is contraindicated in specific cases:

• Known hypersensitivity or allergic reaction to ketoconazole or any excipients in the shampoo base
• Severely broken, acutely inflamed, infected, or weeping scalp lesions without medical assessment
• Children under 12 years of age (unless recommended and monitored by a pediatrician)

Systemic absorption of ketoconazole following topical shampoo use is negligible, making systemic contraindications rare. However, caution is advised if you have reactive contact eczema or chemical allergies.
([dailymed.nlm.nih.gov](https://dailymed.nlm.nih.gov/dailymed/lookup.cfm?setid=a0799f2b-7c15-46ff-b630-fcfefec96979))

Possible Side Effects of Nizral Shampoo

Adverse reactions are predominantly localized to the scalp and are mild and self-limiting:

• Local skin irritation, burning, or mild stinging sensation
• Increased hair dryness, oiliness, or brittle texture
• Mild scalp pruritus (itching) following the initial washes
• Discoloration of chemically treated, permed, gray, or bleached hair
• Transient shedding of telogen hair shafts (rare)

If severe allergic reactions (such as contact dermatitis, widespread hives, facial swelling, or severe scalp blistering) occur, stop use immediately and seek medical evaluation.
([dailymed.nlm.nih.gov](https://dailymed.nlm.nih.gov/dailymed/lookup.cfm?setid=a0799f2b-7c15-46ff-b630-fcfefec96979))

Interactions and Precautions

Because ketoconazole is barely absorbed into the bloodstream from shampoo, systemic drug-drug interactions are not expected. However, local interactions can occur:

Transitioning from Topical Corticosteroids: If you have been managing severe scalp inflammation with potent topical steroids, do not stop the steroid abruptly when starting Nizral. Gradually taper steroid application over 2 to 3 weeks while introducing Nizral to prevent a rebound flare of dermatitis.

Hair Treatments & Perms: The shampoo can remove curls from chemically permed hair or alter coloration. Rinse thoroughly after use to avoid product accumulation.
([dailymed.nlm.nih.gov](https://dailymed.nlm.nih.gov/dailymed/lookup.cfm?setid=a0799f2b-7c15-46ff-b630-fcfefec96979))

Pregnancy and Breastfeeding Safety

Clinical pharmacokinetic studies demonstrate that topical application of ketoconazole 2% shampoo does not produce detectable levels of ketoconazole in maternal serum.

As a result, Nizral shampoo may be considered during pregnancy and lactation when clearly needed, provided it is used according to directions and not applied directly to the breasts prior to nursing. Consult your healthcare provider before use.
([dailymed.nlm.nih.gov](https://dailymed.nlm.nih.gov/dailymed/lookup.cfm?setid=a0799f2b-7c15-46ff-b630-fcfefec96979))

Treatment Timeline & Maintenance Strategy

Fungal scalp conditions tend to recur because Malassezia forms part of the natural skin flora:

Weeks 1–2: Rapid reduction in scalp itching and noticeable decrease in dry flakes. The scalp barrier begins to calm.

Weeks 3–4: Clearance of adherent plaques, redness, and oily crusts associated with seborrheic dermatitis.

Long-Term Maintenance: Once the scalp has cleared, continue applying Nizral once every 1 to 2 weeks. This keeps Malassezia colonization at non-pathogenic levels and helps prevent seasonal relapses.
([dailymed.nlm.nih.gov](https://dailymed.nlm.nih.gov/dailymed/lookup.cfm?setid=a0799f2b-7c15-46ff-b630-fcfefec96979))

Official Medical Reference

For authoritative pharmacological profiles, clinical trial findings, contraindications, and regulatory product data on ketoconazole shampoo, consult the official FDA monograph on DailyMed:

DailyMed – Ketoconazole 2% Shampoo Official Prescribing Information

Frequently Asked Questions About Nizral Shampoo 30 ml

Medical Disclaimer

This product overview is provided strictly for educational and informational purposes. Nizral 2% Shampoo is a medicated antifungal preparation. Persistent scalp irritation, hair shedding, or unresponsive plaque conditions require clinical assessment by a dermatologist or healthcare practitioner. This content does not substitute for individualized medical advice, clinical diagnosis, or specialized treatment plans.