Is a girl sinful for what happened to her in terms of rape and the loss of her virginity after being drugged?

Both Islamic law and sound morals prohibit a Muslim woman from being alone with a foreign man or going with him anywhere. The Quran commands women to remain in their homes and not to display their adornments. It also commands lowering the gaze and not revealing one's adornment to non-mahrams. The Prophet prohibits a man from being alone with a woman or a woman going out perfumed, in order to close the door to indecency and protect honor. Therefore, your going out with a foreign man is a great sin and disobedience. You must sincerely repent to Allah and not return to such actions. You are not obligated to inform your mother or anyone else about what happened; rather, conceal it, for the Prophet, peace and blessings be upon him, said: "All of my Ummah are forgiven except for those who openly commit sins..." (the Hadith (definition)).