Oral minoxidil works by widening blood vessels, increasing blood flow to hair follicles, and stimulating hair growth. On the other hand, Topical minoxidil is specifically formulated for hair loss and is applied directly to the scalp. It works by increasing blood flow to the hair follicles, prolonging the anagen (growth) phase of the hair cycle, and promoting hair growth. Topical minoxidil is available in different strengths, ranging from 2% to 5%, and is generally well-tolerated. However, some people may experience skin irritation, itching, or redness at the application site. Oral minoxidil may also have more potential side effects, such as low blood pressure, heart palpitations, and fluid retention, compared to topical minoxidil. The effectiveness of oral or topical minoxidil may depend on the individual and the underlying cause of hair loss. In general, topical minoxidil is more commonly used and may be more effective for androgenetic alopecia (male or female pattern hair loss). Oral minoxidil may be more effective for hair loss caused by other conditions, such as alopecia areata or telogen effluvium, but it is usually reserved for cases where topical treatments have failed. Please note that it's important to consult with a qualified healthcare professional to determine the most appropriate treatment for your specific situation.