I lost the prescription that the doctor had given me.
The handwriting is so messy that I don't understand what's written on the prescription at all.
Some of the old prescriptions were considered to be dangerous and have been removed from use in modern medicine.
When medicine is sent to your direction it's going to you. That's your prescription.
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.