She's using five grams per day.As stated, YMMV.
ODMT only lasts for four hours AFAIK.
I can't make out what the 5 refers to but I was under the impression that tianeptine prescribed for clinical depression is prescribed at 25-50mg/day.
So if you are really struggling with 5mg, I would really be asking what it actually is.
Yes, people in the states actually use that much and it turns into hell on Earth where many of them either attempt or succeed at suicide because the withdrawals are so bad.
When I was in alcohol rehab, I actually talked to a guy who attempted suicide with fentanyl because he was in such delusional psychotic state from Tia withdrawal and he punched the ambulance driver when he was revived.
He was on day 90 in the program because he wasn't progressing and his insurance was really good.