IRCT201105266206N3 IRCT 2011-07-10 Herbal Research Center, Shahed University effect of ginger on pain relief in primary dysmenorrhea The effects of Zingiber officinal R. root on primary dysmenorrhea 2008-06-21 anticipated 105 Complete https://irct.ir/trial/6641 interventional Randomization: Randomized, Blinding: Double blinded, Placebo: Used, Assignment: Parallel, Purpose: Treatment. N/A primary dysmenorrhea. Intervention 1: The ginger is receiving 500 mg capsules of ginger powders three times in two different treatment protocols. Both the treatment protocols are conducting on the same patients with one month interval between the protocols. Treatment protocol 1: In this protocol ginger is giving two days before and continuing through the three days from starting menstrual period. In the second protocol ginger is giving for the first three days of the menstrual period. Treatment protocol 2: In this protocol ginger is giving for the first three days of the menstrual period. Intervention 2: The placebo is receiving 500 mg capsules of placebo powders three times in two different treatment protocols. Both the treatment protocols are conducting on the same patients with one month interval between the protocols. Treatment protocol 1: In this protocol placebo is giving two days before and continuing through the three days from starting menstrual period. In the second protocol placebo is giving for the first three days of the menstrual period. Treatment protocol 2: In this protocol placebo is giving for the first three days of the menstrual period.