Honestly, if someone is under the influence of a drug but does a bad thing (like rape in this instance) are they even able to take accountability for it, fully I mean, especially since it was an accident and not something deliberate like drinking and then going to drive.
Imo, the MC's reaction afterwards is so overblown as if she did that of her own free will, which she did not, she was not at fault but reacted as if she decided to rape her friend
Don't know about other countries, but in the UK our Legal definition of "Sexual Assault" run to Nine pages long,
(Most people only bother to read the first two pages , (Big mistake)),
In essences the offender is the person in "CONTROL".
i.e. If you force someone to have sex with someone, (drugs, blackmail, threats to others etc)
you will be deemed to have Sexually Assaulted BOTH!
So therefore, if someone had tampered with the experiment,
which resulted in the MC's loss of control and the assault,
Then it is they not the MC who is at Fault!