By the Community, for the Community

Know Your Substance

Free, fact-checked harm reduction information — including drug interaction checks, overdose first aid, medication lookup by barcode, and community supply warnings.

Check Drug InteractionsOverdose ResponseSupply Warnings

Drug Interaction Checker

Enter up to 8 drugs or medications to check all known interactions at once — sourced from RxNav. Start typing to see name suggestions. This is a safety reference, not a substitute for clinical advice.

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Medication Lookup

Scan a pill bottle barcode or type in a UPC/NDC code to see what a medication is, its active ingredients, and dosage form.

Safety Guides & Overdose Response

Practical, plain-language safety guides written by and for the community — reviewed against public health references. Includes overdose signs and step-by-step first aid.

Safer Use Basics

Start low, go slow, and avoid using alone. Potency varies heavily in unregulated supply chains.

  • Test a very small amount first and wait before re-dosing.
  • Avoid mixing depressants (opioids, benzos, alcohol) because respiratory risk compounds quickly.
  • Use with a trusted person whenever possible and establish a check-in plan.

Sources: WHO, NIDA

Fentanyl Contamination Risk

Counterfeit pills and non-opioid powders can contain fentanyl. Treat unknown supply as high risk.

  • Use fentanyl test strips where legal and available.
  • Keep naloxone accessible before any use event.
  • If someone becomes very sleepy or breathing slows, treat it as a possible opioid overdose immediately.

Sources: NIDA, CDC

When to Seek Help

If breathing is slow, stopped, or irregular, call emergency services right away and give naloxone if available.

  • Call emergency services and stay with the person.
  • Give naloxone and repeat per kit instructions if no response.
  • Place in recovery position if breathing returns but they remain unconscious.

Sources: CDC, SAMHSA

Overdose Signs & First Aid

Universal First Aid Protocol — DRABC

  1. DDanger
  2. RResponse
  3. AAirway
  4. BBreathing
  5. CCirculation

Opioids

Life-Threatening Emergency3Rs — Recognize · Respond · Reverse

Watch for:

  • Slow or stopped breathing
  • Blue or gray lips / fingertips
  • Pinpoint pupils
  • Unresponsive to voice or touch

Respond:

  1. 1Call 911 immediately.
  2. 2Give naloxone — nasal spray or injection per kit instructions.
  3. 3Rescue breathe: 1 breath every 5 seconds.
  4. 4Repeat naloxone in 2–3 min if no response.

Stimulants

Medical Emergency

Watch for:

  • Chest pain or racing heart
  • Seizure
  • Very high body temperature
  • Severe agitation or confusion

Respond:

  1. 1Call 911 immediately.
  2. 2Move to a cool, quiet area — reduce stimulation.
  3. 3Do not restrain; protect from injury during seizure.

Alcohol / Benzos

Life-Threatening Emergency

Watch for:

  • Very slow or stopped breathing
  • Vomiting while unconscious
  • Cannot be woken
  • Clammy or cold skin

Respond:

  1. 1Call 911 immediately.
  2. 2Place in recovery position — on their side, chin forward.
  3. 3Never leave the person alone.

Supply Warnings

Share and view local alerts about dangerous changes in the drug supply — like unexpected fentanyl presence, adulterated batches, or overdose clusters. Community reports are reviewed before being verified.

    Sources & References

    All content on this site is drawn from the following public health and clinical references, checked for accuracy.