Isaac appears sick.

Turns tears green and gives them a 25% chance to poison enemies for 2.5 seconds.



  • Technology 2 - Every tick of the laser's damage will have a chance to poison enemies, and since Technology 2 has an extremely high fire rate, enemies will be poisoned more often.


  • If you shoot at bombs, they will turn green, and the explosion will also be green, but the effect of the bomb stays the same.

Related Achievements

"The Common Cold" - Collect two of the following items in one playthrough: Roid Rage, The Virus, or Growth Hormones.

Start a Discussion Discussions about The Common Cold

  • So what is the actual Damage of Poison?

    7 messages
    • Right so, The Common Cold deals 3 ticks of 2 damage over an unsure amount of time (the Wiki says 2.5 seconds, but it seems shorter). For a to...
    • Nice work
  • Possibe interaction?

    2 messages
    • I picked up the Magic Mushroom on the first floor and Common Cold on the second, and it appears to shoot poison shots every time now. Has any...
    • Ignore this... The shots are green, but don't always poison.

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