Silver sting

Silver sting is a consumable in Fallout: New Vegas.

Characteristics
Silver Sting is the simplest and easiest poison to create, and one of the more useful ones. It is derived from scorpion venom, and is a potent cytotoxin. When injected, it causes a spreading feeling of weakness and considerable agitation of the wound site, causing -2 Strength and a total 80 damage over 10 seconds.

Its Strength-weakening properties make it valuable when facing tough, melee-focused enemies, including creatures like giant radscorpions, deathclaws, and super mutants. Similar to Mother Darkness, Silver Sting is less lethal than Bleak Venom in terms of raw damage, but remains highly useful and effective.

Like all venoms, it can be applied to any unarmed or melee weapon (including thrown weapons) to allow you to poison a target on a successful hit.
 * Note: that one application of poison lasts for one strike or thrown projectile only.

Locations
Silver sting must be crafted by the player, as it cannot be found in containers or bought from vendors.