IRCT2015050322053N1.

Study name	Comparison of the effect of chamomila matricaria and mefenamic acid capsules on postpartum pain and haemorrhage
Methods	Randomised double‐blind study
Participants	70 multiparous women. Location: Iran Inclusion criteria: age:18 ‐ 35 years, normal vaginal delivery, live birth, gestational age: 37 to 42, multiparity, cephalic presentation, neonatal weight is 2500 ‐ 4000 g, singleton, having moderate or severe after‐pain based on a visual scale, no consumption of benzodiazepine, barbiturates, narcotics, alcohol, aspirin, warfarin and heparin 11, no sensitivity to Chamomila, no history of medical illness, no caesarean section history, no severe bleeding, no rupture of the cervix and uterus, no history of postpartum haemorrhage, no addiction of mother to drugs and alcohol, no high‐risk pregnancy, no rupture of membranes more than 12 hours Exclusion criteria: mother's unwillingness to continue to participate in study, severe bleeding
Interventions	Group 1: Chamomila Matricaria capsules 1000 mg 2 to 4 hours after birth Group 2: Mefenamic acid capsule 250 mg 2 to 4 hours after birth
Outcomes	Pain intensity on VAS, every hour for 6 hours after taking medication Postpartum haemorrhage measured with weight of pads
Starting date	Expected recruitment start date: 12 January 2015
Contact information	rezvanifardm911@mums.ac.ir
Notes	Expected recruitment end date: 12 June 2015