Fentanyl Test Strips in New Jersey

Fentanyl test strips are legal in New Jersey and available for free through NJ Harm Reduction Centers, health departments, and some pharmacies. They can detect the presence of fentanyl in a drug sample before use — providing a layer of information that can mean the difference between life and death. This page explains what they are, how to get them, how to use them, and — critically — what their limitations are.

Legal status: Fentanyl test strips are fully legal in New Jersey. NJ decriminalized fentanyl test strips as part of its harm reduction legislation. You can carry and use them without legal consequence.

What Are Fentanyl Test Strips?

Fentanyl test strips (FTS) are immunoassay lateral flow strips — the same type of technology used in pregnancy tests and COVID rapid tests. They are specifically calibrated to detect fentanyl molecules in a sample.

Originally developed for urine drug testing, fentanyl test strips have been repurposed for harm reduction: testing a small dissolved sample of a drug for the presence of fentanyl before use. They are inexpensive to manufacture, easy to use, and require no special equipment.

How to Get Free Fentanyl Test Strips in New Jersey

Free fentanyl test strips are available through multiple channels in New Jersey:

NJ Harm Reduction Centers (HRCs): The primary distribution point. HRCs throughout NJ distribute free test strips, often alongside naloxone, xylazine test strips, and wound care supplies.
Camden County OMHA: (856) 374-6361 — can connect you with local harm reduction services including test strip access
Cooper University Health Care Harm Reduction Network: Coordinated harm reduction services throughout Camden County
Some pharmacies: A growing number of pharmacies stock fentanyl test strips for purchase; some distribute free
Naloxone365 locations: Some Naloxone365 sites also distribute test strips — check naloxone365.nj.gov
NJ 211: Dial 2-1-1 to get connected with local harm reduction resources that may include test strip distribution

How to Use Fentanyl Test Strips

Prepare your sample. Dissolve a small amount of the drug in water. For most drugs, use about ¼ teaspoon of water (roughly 1/4 mL). If testing residue from a bag, add water directly to the bag.

Dip the strip. Dip the wavy-end of the strip into the water for about 15 seconds. Do not submerge the entire strip.

Lay flat and wait. Place the strip on a clean, flat surface and wait 2–5 minutes for results to appear.

Read the result:

ONE line = FENTANYL DETECTED (this is counterintuitive — one line means positive)
TWO lines = fentanyl NOT detected (two lines means negative)
No lines = invalid test (retest with a new strip)

Remember the counterintuitive result: ONE line means fentanyl IS present. TWO lines means fentanyl is NOT detected. This is the opposite of how most people expect test results to work. Write it on your hand if you need a reminder.

Critical Limitations of Fentanyl Test Strips

A negative result does NOT guarantee safety. Fentanyl test strips cannot detect all fentanyl analogs. Some newer synthetic opioids may not trigger a positive result even when present. Never use alone, regardless of what the test shows.

Fentanyl test strips are a harm reduction tool — not a guarantee of safety. Their limitations include:

Analog sensitivity: Test strips are calibrated to detect fentanyl and some common analogs, but cannot detect all fentanyl variants. New analogs regularly enter the drug supply that strips may miss.
Sampling error: Fentanyl is not evenly distributed in a drug sample ("hot spots"). Testing one portion of a substance does not guarantee that other portions are fentanyl-free.
Xylazine detection: Standard fentanyl test strips do NOT detect xylazine. NJ now also distributes xylazine-specific test strips — see: Xylazine in the NJ Drug Supply.
Other dangerous adulterants: Test strips only detect fentanyl (and some analogs). They do not detect other dangerous substances like nitazenes (a class of novel synthetic opioids) or other cutting agents.

Xylazine Test Strips: Now Also Available in NJ

Following the enactment of January 2024 legislation, New Jersey also began distributing xylazine test strips at Harm Reduction Centers. Xylazine test strips detect the presence of xylazine ("tranq") in a sample — a critical development given that xylazine is increasingly found in South Jersey's fentanyl supply and Narcan cannot reverse its effects.

If you are obtaining fentanyl test strips at an NJ HRC, ask for xylazine test strips as well. The procedures for use are similar.

Harm Reduction Is Not Endorsement

Information about fentanyl test strips and other harm reduction tools is provided here for public safety purposes. The goal of harm reduction is to reduce death and injury — not to encourage drug use. If you or someone you love is struggling with addiction, professional treatment is available and effective.

Medication-Assisted Treatment (MAT) with buprenorphine dramatically reduces overdose risk among people with opioid use disorder — studies show 50% or greater reduction in overdose mortality. Hope Harbor Addiction Center provides MAT and comprehensive addiction treatment in Cherry Hill, NJ, serving all of Camden County and South Jersey.

Questions about addiction treatment in Cherry Hill or South Jersey? Our team is available 24 hours a day. Call (732) 523-5239 — confidential, no obligation.