Drug Interactions Label Lookup

Use this endpoint when you need to surface the official FDA label interactions text for a specific drug — especially when you want to check whether a second drug is explicitly called out in that label. Prefer this over general drug interaction databases when the goal is label-level regulatory text rather than clinical decision support. Best suited for informational lookups, research, or drafting summaries that reference official labeling language.

• Drug name not found in FDA label database — returns 404 or empty result
• Misspelled or unrecognized drug name yields no match
• Second drug name not found mentioned in interactions section — returns negative/false flag
• Label exists but has no interactions section — returns empty or null section
• Rate limiting or payment failure — returns 402 or 429
• Ambiguous drug name with multiple matches may return one variant without disambiguation