“Pins” is drug slang for clonazepam, a prescription benzodiazepine sold under the brand name Klonopin. The nickname comes from shortening “K-pins,” itself a play on Klonopin. The term also sometimes refers to hypodermic needles used for injecting drugs, though the pill-related meaning is far more common in online searches and street-level conversations. Here’s what you need to know about both meanings.
Pins as Slang for Clonazepam
The DEA’s reference guide for law enforcement lists “Pin” as a recognized street name for clonazepam, alongside “Super Valium” and “Tranks.” You’ll also hear people say “K-pins,” “K-pin,” or just “pins” when referring to the pills. Clonazepam is a benzodiazepine, the same family of sedatives that includes Xanax (alprazolam), Valium (diazepam), and Ativan (lorazepam). All of these drugs work by boosting the activity of GABA, a chemical in the brain that slows down nerve signaling. The result is a calming, sedating effect.
Clonazepam has two FDA-approved uses: treating certain seizure disorders and treating panic disorder. For panic disorder, the typical target dose is 1 mg per day. For seizures, doses can go much higher, up to 20 mg per day, though that ceiling is rarely needed. The drug is classified as a Schedule IV controlled substance under federal law, meaning it has recognized medical value but also carries a real risk of dependence and misuse.
What the Pills Look Like
If someone is talking about “pins,” they’re usually describing small, round tablets. Generic clonazepam tablets come in three common strengths, each a different color: 0.5 mg tablets are yellow, 1 mg tablets are light green, and 2 mg tablets are white. All three are about 8 mm across (roughly the size of an aspirin) with the dose number stamped on one side and a score line on the other for splitting. Brand-name Klonopin tablets may look slightly different, but the color coding by strength is similar across most manufacturers.
Why People Misuse Clonazepam
Clonazepam produces a noticeable sense of calm and relaxation, which makes it appealing beyond its prescribed uses. Some people take it recreationally to reduce anxiety in social settings, to come down from stimulants, or to intensify the effects of opioids or alcohol. That last combination is especially dangerous.
According to the 2024 National Survey on Drug Use and Health from SAMHSA, about 1.2% of Americans aged 12 or older misused benzodiazepines in the past year. Among young adults aged 18 to 25, the rate was slightly higher at 1.4%. These numbers cover all benzodiazepines, but clonazepam is consistently among the most commonly misused in the group.
Overdose Risks
Taken alone, a clonazepam overdose typically causes heavy drowsiness, slurred speech, poor coordination, and confusion. Vital signs often remain stable, and isolated benzodiazepine overdoses are rarely fatal on their own. The picture changes dramatically when clonazepam is mixed with other substances.
Combining it with alcohol, opioids (including fentanyl), or other sedatives can cause life-threatening respiratory depression, where breathing slows to a dangerous level or stops entirely. Most intentional benzodiazepine overdoses involve at least one other substance, with alcohol being the most common. This combination is what turns a survivable overdose into a fatal one. If someone appears unconscious, is breathing very slowly, or has blue-tinted lips after taking pins with anything else, that’s a medical emergency.
Dependence and Withdrawal
Clonazepam builds physical dependence faster than many people expect, sometimes within just a few weeks of daily use. The body adjusts to the constant presence of the drug, and removing it triggers a withdrawal syndrome that can range from uncomfortable to medically serious.
Common withdrawal symptoms include rebound anxiety and insomnia (often worse than whatever the drug was treating), irritability, hand tremor, sweating, difficulty concentrating, nausea, palpitations, headache, and muscle pain and stiffness. Many people also experience perceptual changes like heightened sensitivity to light, sound, or touch. The mildest pattern is a short-lived rebound that starts within one to four days of stopping. A full withdrawal syndrome typically lasts 10 to 14 days but can stretch longer for people who used high doses for extended periods. In severe cases, withdrawal can trigger seizures or psychotic reactions, which is why abruptly stopping clonazepam without medical guidance is risky.
Pins as Slang for Needles
The other meaning of “pins” in drug culture refers to hypodermic needles or syringes used for injecting drugs intravenously. This usage is straightforward: the needle resembles a pin. People who inject drugs face a distinct set of health risks beyond the drugs themselves.
Reusing needles or sharing them with others dramatically increases the chance of contracting HIV, hepatitis C, and other bloodborne infections. Needles also weaken with repeated use and can break off inside the body. One case documented in the New England Journal of Medicine described a person with a history of IV drug use who had three needle fragments embedded in the tissue of his forearm, discovered only after imaging. Repeated injections into the same veins cause scarring and hardening of the tissue, which makes future injections more difficult and more dangerous.
Syringe Service Programs
For people who inject drugs, syringe service programs (sometimes called needle exchanges) provide access to sterile syringes and safe disposal of used ones. These community-based programs also offer testing and vaccination for infectious diseases, along with connections to substance use treatment. According to the CDC, comprehensive syringe service programs are associated with a 50% reduction in new HIV and hepatitis C infections. Nearly 30 years of research confirms they do not increase drug use or crime in surrounding communities.
These programs operate in most major U.S. cities and many smaller communities. Beyond sterile needles, they typically distribute other supplies that reduce infection risk, such as alcohol swabs, tourniquets, and safe containers for used sharps. Many also carry naloxone for opioid overdose reversal.