Question: could a spiders poison be consentrated to make a potentially harmful substance?

Beth Mortimer answered on 18 Jun 2012:

Yes. Although for some spiders their venom is harmful without concentrating it. All spiders produce venom which have varied toxicity and effects on the body. There are only a handful of spiders have been known to kill humans in rare cases. Spiders also only produce tiny amounts of venom (only a tiny drop is needed).