Is apomorphine hydrochloride an opioid or a dopamine agonist?
Apomorphine hydrochloride is a dopamine agonist, not an opioid. DailyMed’s drug labeling for apomorphine hydrochloride describes it as acting on dopamine receptors (and it is used for Parkinson’s disease–related motor symptoms), which is pharmacologically distinct from opioids that primarily act on opioid receptors for pain relief.[1]
Why does the DailyMed entry matter for “not opioid” clarification?
If you are checking whether a medicine is an opioid, the most reliable way is to look at the drug’s FDA labeling (DailyMed). In the apomorphine hydrochloride DailyMed listing, the drug class/mechanism is presented in terms of dopamine receptor activity rather than opioid receptor activity.[1]
What is apomorphine hydrochloride used for (and how that fits with dopamine agonism)?
Apomorphine is used in Parkinson’s disease for episodes related to dopaminergic underactivity (commonly described as “off” episodes/motor fluctuations in labeling and prescribing information). That treatment approach aligns with dopamine agonist activity rather than opioid use.[1]
Common confusion: “morphine/morphine-like” wording
The name “apomorphine” can sound related to “morphine,” but the similarity is in the name, not the pharmacology. Morphine is an opioid, while apomorphine is a dopamine agonist. DailyMed labeling reflects this distinction in how the drug is classified and described.[1]
Where to verify this quickly in DailyMed
Open the specific apomorphine hydrochloride page on DailyMed and look for sections that state the drug’s class/mechanism and indications. Those sections should identify it as a dopamine agonist rather than an opioid.[1]
Sources:
1. https://dailymed.nlm.nih.gov/dailymed/