Here is the link to the FLCCC website. They discuss protocols in detail. I haven’t taken pills, but I have taken the veterinary 1% sterile solution about thirty times (this morning, in fact), both as prophylactic and as post-exposure. Have had zero negative effects from Ivermectin, and have not had covid yet, unless it has been asymptomatic. The dose your friend gave you sounds about right for your weight and for having symptoms, but it is only one dose and you would want more if you are sick.
https://covid19criticalcare.com/covid-19-protocols/
Here is another bit of information from a source I have some confidence in:
Good luck.