Re: Relactating after 5 years...
That's an amazing gift you are planning to give your friend. Would she consider nursing the baby herself if the medications allowed? A lot of moms are told "No, you can't nurse, you're on this or that drug," when the real answer is "Yes, that drug is fine for nursing." A lot of docs are very overconservative about combining breastfeeding and medications.
The more you pump, the faster you will relactate. You can try using the herbs fenugreek, oatmeal, and blessed thistle to boost supply, but I personally wouldn't expect too much from them. Herbs aren't a substitute for pumping.
I'd suggest seeing a lactation consultant for help with the sore nipples. Your shields may be the wrong size- that's a common cause of soreness. Try lubricating your nipples with some olive oil. It may reduce soreness and chaffing.
Has your friend contacted a milk bank? That may allow her to get human milk for her baby as you persue the relactation process.
Coolest thing my big girl said recently: "How can you tell the world is moving when you are standing on it?"
Coolest thing my little girl sang recently: "I love dat one-two pupples!"