friendlyneighborhoodstreetmedic:

Chemical weapons aftercare
Avoid entering the house with contaminated clothing. If possible, remove contaminated clothes and put in a plastic bag. Avoid touching other people, pets, furniture, etc.
Take a cool or tepid shower. Use soap.
Wash clothes through a machine twice with strong detergent
Your liver is helping break down the chemical irritants You can support your liver by not drinking alcohol for a few days after the event. Herbs like dandelion and milk thistle will support the liver, too.
Take care of yourself emotionally. What helps you deal with pain, grief, and anger? Talking to some trusted friends (who were with you or not) can be a helpful way to process.
If you can, avoid watching footage of the event (at least for a few days). It can be retraumatizing.