Diazepam, widely known by the brand name Valium, is a Schedule IV controlled substance under the federal Controlled Substances Act. This means the DEA classifies it as having a low potential for abuse relative to drugs in Schedules I through III, but it still carries legal restrictions on how it can be prescribed, dispensed, and possessed.
What Schedule IV Means
The Controlled Substances Act organizes drugs into five schedules based on their medical usefulness and potential for abuse. Schedule I is the most restrictive (drugs with no accepted medical use and high abuse potential), while Schedule V is the least. Schedule IV sits near the lower end of that scale, reserved for substances that have legitimate medical applications and a comparatively low, but real, risk of dependence.
All benzodiazepines that are legally prescribed in the United States fall into Schedule IV. That includes not just diazepam but also alprazolam (Xanax), lorazepam (Ativan), and clonazepam (Klonopin). The scheduling has not changed in recent years, and no federal proposals are currently pending to reclassify diazepam. A related development worth noting: in 2026, the DEA did emergency-schedule bromazolam, a synthetic benzodiazepine found in counterfeit Xanax tablets, placing it in Schedule I because it has no accepted medical use. That action did not affect the status of prescription benzodiazepines like diazepam.
How the Schedule Affects Your Prescription
Because diazepam is Schedule IV, federal law sets specific limits on how prescriptions are handled. A diazepam prescription can be refilled up to five times, and the prescription expires six months after the date it was written. After that, your doctor needs to issue a new one. Unlike Schedule II drugs (such as opioids like oxycodone or stimulants like amphetamine), Schedule IV prescriptions can be called in by phone or transmitted electronically without the extra verification layers required for higher schedules.
These rules apply nationwide, though individual states can impose tighter restrictions. Some states require prescribers to check a prescription drug monitoring program before writing a benzodiazepine prescription, and a few limit initial prescription durations to 30 days or less.
Why Diazepam Is Controlled at All
Diazepam works by amplifying the effects of a natural calming chemical in the brain called GABA. It doesn’t produce this chemical on its own. Instead, it binds to a separate spot on the same receptor and shifts it into a state that responds more strongly to GABA. The result is reduced anxiety, muscle relaxation, and sedation. That calming effect is exactly what makes it medically useful, but it’s also what creates the potential for misuse.
Compared to some other benzodiazepines, diazepam has a somewhat lower misuse profile. Emergency department data shows that diazepam is involved in roughly 1 misuse-related visit per 517 prescriptions, compared to 1 in 311 for alprazolam and 1 in 321 for clonazepam. Clinical studies of people with benzodiazepine dependence have consistently found that participants prefer alprazolam over equivalent doses of diazepam. One reason for this: diazepam and its breakdown products stay in the body much longer, washing out gradually after the last dose. That slow elimination produces a gentler offset, which means fewer and less severe withdrawal symptoms compared to faster-acting benzodiazepines like alprazolam.
That said, physical dependence can develop with regular use of any benzodiazepine, including diazepam. Stopping abruptly after weeks or months of daily use can trigger withdrawal symptoms ranging from rebound anxiety and insomnia to, in severe cases, seizures. This is the core reason it remains a controlled substance rather than a standard prescription drug.
What Diazepam Is Prescribed For
Diazepam has a broad range of FDA-approved uses. It is prescribed for anxiety disorders, short-term anxiety relief, muscle spasms, spasticity caused by upper motor neuron disorders, preoperative anxiety, and certain types of seizures including status epilepticus (a prolonged seizure that doesn’t stop on its own). It is also used off-label for sedation in intensive care settings and for short-term management of spasticity in children with cerebral palsy.
Legal Consequences of Possession Without a Prescription
Possessing diazepam without a valid prescription is a criminal offense. Because it is Schedule IV rather than Schedule II, the penalties are generally less severe than for opioids or amphetamines, but they are still significant and vary by state.
To illustrate, Ohio law treats possession of a Schedule IV substance as a first-degree misdemeanor for small amounts, which can carry up to 180 days in jail. If the amount reaches the state’s defined “bulk amount” threshold, the charge escalates to a fourth-degree felony. At fifty times the bulk amount, it becomes a second-degree felony with mandatory prison time. Other states follow similar tiered structures, though the specific thresholds and penalties differ. Federal charges can also apply, particularly in cases involving distribution or trafficking across state lines.
The key legal distinction is straightforward: if you obtained diazepam through a legitimate prescription from a licensed prescriber for a medical purpose, possession is legal. Without that prescription, even a small amount puts you at risk of criminal charges.