Brown recluse bites: My husband has had two bites over the years. His grandmother taught me to make a poultice with flaxseed. It draws the poison out. Works for slivers and glass to draw out. Crush the seeds to powder, add just enough water to make a paste. Put in gauze and apply to the area overnight. Do this several times.
A spider bite on my elbow swelled up to about softball size and hurt a lot. A flaxseed poultice brought the pain levels and swelling down about 75% within 45 minutes. Since then I always keep flaxseed in the refrigerator, as it has drawing properties whether used on a splinter, a boil, or a venomous bite. Grind the flaxseed (a blender does a great job), add just a few drops of bath temperature tap water, make a paste and apply. Cover with plastic wrap and then cloth, or just use a regular adhesive bandage.