Hi Cliona. I had arnica 30c from boots. i took 2 pills every 2 hours for the first 6 doses then 2 tablets 4 times every day. Started 5 days before op and continued for 7 days afterwards. I had really severe bruising after my op, so not sure if arnica helped, but I took it and continued to take it hoping that it would help.
I would say it’s worth taking and deffo doesn’t do any harm xx