The onion being eaten, yea ...

The onion being eaten, yea though it be boyled, causeth head-ache, hurteth the eyes, and maketh a man dimme sighted, dulleth the senses, ingendreth windinesse, and provoketh overmuch sleepe, especially being eaten raw
 John Gerard

Quotes from the same author

If odours may worke satisfaction, they are so soveraigne in plants and so comfortable that no confection of the apothecaries can equall their excellent vertue.
 John Gerard