Toenail fungus affects roughly 10% of the global population, with higher rates among older adults and people with diabetes. Most people tend to delay the treatment thinking it's cosmetic, but untreated infections get worse over time, it spreads deeper into the nail bed and over time it becomes harder to clear.
The reason most treatments fail is because they only address the surface. Fungal infections are protected by three key barriers: the nail's keratin shield, fungal biofilm, and dormant spores that trigger reinfection. Over-the-counter products don't penetrate deeply to cure these, this is the reason recurrence rates remain high without prescription-grade treatment.
Dermatologists always find that combination therapy; oral and topical together delivers the best outcomes. Oral terbinafine attacks the infection systemically from within. A penetration-focused prescription topical addresses it from the surface. Together, they work top-down and bottom-up simultaneously.
At STRIDE™, this is the foundation of STRIDE DUO™ is clinically effective in 89% of cases.
STRIDE DUO™ pairs oral terbinafine on a pulse dosing protocol (7 days on / ~90 days off) with STRIDE™ ClearNail Renewal™ topical. Pulse dosing works because terbinafine stays active in nail tissue for weeks after each cycle.
What does this mean? It means full daily dosing isn't necessary, and liver-related side effect risk is significantly reduced.
You can see improvement begins in around 8–12 weeks as healthy nails start growing. Advanced infections usually take 9–12 months for full clearance. Remember, consistent treatment and foot hygiene are a must. You must keep nails trimmed, feet dry, and footwear breathable, this helps to support recovery faster.
Not sure if it's fungal? Upload a photo and get reviewed by a licensed provider.