Methyldopa patented?

Short answer: No active patent protection on methyldopa itself today. The molecule is generally off-patent and available as a generic drug (brand name Aldomet and others).

A few details:
- The original patents around methyldopa (and some early patents on salts or manufacturing methods) have long since expired (decades ago in most countries).
- There can sometimes be patents on specific salts, formulations, or combination products, but those are also likely expired in most jurisdictions by now.
- In practice, methyldopa is widely generic across many markets.

If you want exact patent numbers and expiry dates for a specific country or for a particular salt/formulation, tell me the country and I can look up the records (USPTO, EPO/Espacenet, WIPO Google Patents).