<s>[INST] My friend was bitten by a spider. He is experiencing a burning sensation in his hands, breaking out in a rash on his arms, feels his air way swelling and it is becoming hard to breath. We gave him a benedryl to help with the allergic syptoms he was having. All of his sypmtoms have ceased but, should we seek further medical help? [/INST] Hi,Some time some poisonous bite gives rise severe allergic reaction producing severe edema in throat leading to medical emergency.Now as all allergic symptoms ceased, nothing to worry.Continue Benadryl or Cetrizine for 2-3 days more.Ok and take care. </s>