Comparative Pharmacology
Head-to-head clinical analysis: HEAD SHOULDERS CONDITIONER versus LAMISIL AT.
Peer-Reviewed Evidence
Head-to-head clinical analysis: HEAD SHOULDERS CONDITIONER versus LAMISIL AT.
HEAD & SHOULDERS CONDITIONER vs LAMISIL AT
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
Not applicable; this is a cosmetic conditioner. No pharmacological mechanism.
Terbinafine inhibits squalene epoxidase, an enzyme in the fungal ergosterol biosynthesis pathway. This leads to accumulation of squalene and depletion of ergosterol, disrupting fungal cell membrane integrity and causing cell death.
Not applicable. Head & Shoulders Conditioner is a cosmetic product for external use on hair and scalp; no systemic dosing.
Terbinafine 250 mg orally once daily for 6 weeks for fingernail onychomycosis or 12 weeks for toenail onychomycosis. Topical: 1% cream applied once daily for 1 week for tinea pedis; 1% solution applied once daily for 1 week for tinea corporis/cruris.
None Documented
None Documented
Not applicable for systemic elimination; local retention on hair/scalp lasts until next wash (typically 24-48 hours).
The terminal elimination half-life is approximately 11-17 hours in healthy adults; however, it increases to about 200-400 hours in the distribution phase from tissues (e.g., skin, adipose). Steady-state is reached after 10-14 days of oral dosing.
Renal (urine): <1% unchanged; biliary/fecal: <1% as parent compound; majority remains on hair/scalp and is removed via washing and shedding. Systemic absorption negligible.
Terbinafine is extensively metabolized in the liver; approximately 80% of a dose is excreted in urine as metabolites, and 20% in feces. Less than 1% is excreted unchanged in urine.
Category C
Category C
Antifungal/Antidandruff
Antifungal