Rogaine must be used consistently for at least six consecutive months to determine whether it works. Will my hair grow faster if i use rogaine more than 2 times a day? This 35-year-old Man Is Shown Before And 5 Months After Starting Topical Finasteride Therapy Minoxidil Topical Facial Plastic Minoxidil starts working immediately, but won’t produce any noticeable results for the first three to six months. How long does rogaine work . “how long does rogaine take to work?” when it comes to hair loss.📦claim your free derma roller: This is a rather long amount of time to go before you can know if it isn’t working. You’ll have to use rogaine indefinitely to maintain any regrowth. Rogaine is not an instant cure, and you should not use it inconsistently. Conclusion there is no doubt that rogaine can contribute to hair growth. However, physicians estimate the average time taken for rogaine’s effects to be observed at about four months, so some patience and commitment are needed. ...