Keep the solution away from the eyes, mouth, and genitals, as the resulting reaction can be extremely painful in those areas.
For hair regrowth, it can take 3 to 6 months of weekly treatments to see visible results. Sadness: Diagnosis, Evaluation, and Treatment - PMC - NIH sad-032
Some formulations are sensitive to light; follow your provider's instructions regarding sun exposure or washing the area. Keep the solution away from the eyes, mouth,
You are usually instructed to leave the solution on the skin for 24 to 48 hours before washing it off. sad-032
A high-concentration patch is applied to a small area (often the inner arm) to "prime" your immune system.