system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why are all doctor's handwriting so messy, and how do pharmacists decipher what the prescriptions say?
gpt
Pharmacy side: If we aren't 100% sure, we call and ask.  That being said, there are fairly standard dosing for most medications and standard anotations.  For example, Z-paks are 99.999% of the time  2 tabs on day 1, 1 tab daily days 2-5.  So even if the doc writes iiT PO OD D1, we know s/he meant QD instead of OD. (QD being everyday, OD being your right ear)