@kayraymat
A compounding pharmacy prepares customized medications from scratch, tailored to an individual patient's needs, rather than dispensing mass-produced, off-the-shelf drugs.
A pharmacist mixes, combines, or alters ingredients based on a prescriber's order. Naltrexone is prescribed at much higher doses (50mg or more) for alcohol and opioid abuse, so for low doses it needs to be created. LDN is at a small fraction of the normal naltrexone dose. I'm only taking 3mg.