Bupropion, also known as finasteride, taken every other day will affect the efficacy of the treatment, because such medication is equivalent to halving the recommended dosage, and the efficacy of the treatment will be reduced accordingly. Finasteride is commonly used in the treatment of androgenetic alopecia. The half-life of the drug is 6 to 8 hours, one milligram of the drug once a day is the recommended dosage of the manual, if used every other day, the amount of drug is slightly insufficient, the efficacy of the treatment may be slower, but also prolong the hair recovery period. The recommended dosage is usually effective after three months, if halved, the effect will be longer. Finasteride drug although small, but the role of a large, must be under the guidance of a doctor to use the correct medication, the amount of too much or too little may produce adverse effects.