Breastfeeding moms

I have heard that mms is safe when breastfeeding, but I have a breastfeeding mother I've recommended it's use for a cold or something she's coming down with. Don't think it's covid cuz she doesn't have a fever or body aches and everyone I know who's had it, has had these main symptoms. 
I would like to hear personal accounts and accounts of people who know women who've used it while breastfeeding to reassure her is safe. 
I will also do a search here! 
Please and thank you! 😊