At my organization we have run into issues and are looking into putting a policy in place for how to handle patient own medications that are brought into the hospital that are packaged by companies such as Amazon PillPack. These medications are packaged by date and time and usually include the number of medications, name, and dose.
Overall, we limit the use of patient own medication to specific circumstances where the pharmacy is not able to procure the medication (or until the pharmacy can procure the medication) or if the patient requires a specific brand of medication.