Benzo Withdrawal Timeline: How Long It Lasts, Week by Week
In brief. Benzo withdrawal usually begins within a day for short-acting drugs like Xanax and Ativan, and up to three weeks later for long-acting ones like Valium. Acute symptoms tend to be strongest in the first weeks and then ease. A minority of people, estimated at up to 15 percent, have symptoms that last months. Professor Heather Ashton wrote that for long-term users, symptoms usually resolve within 6 to 18 months of the last dose, and that eventual recovery appears to be the rule.[1][2][3] For Xanax specifically, see Xanax withdrawal symptoms and timeline.
Why there is no single timeline
If you have searched this question, you have probably seen confident answers that disagree with each other. That is because the honest answer depends on four things:
- Which benzodiazepine you take, and how quickly it leaves the body
- Your dose
- How long you have taken it
- How fast the dose comes down
The last one is the one you can most influence, and it matters more than most people realize.
The timeline by drug
Half-life is the time it takes for the level in your blood to fall by half. The shorter it is, the sooner withdrawal tends to start.[4]
| Medication | Half-life (hours) | About equal to 10 mg Valium | When symptoms tend to start |
|---|---|---|---|
| Xanax (alprazolam) | 6–12 | 0.5 mg | Within a day |
| Ativan (lorazepam) | 10–20 | 1 mg | Within a day |
| Klonopin (clonazepam) | 18–50 | 0.5 mg | Often several days |
| Valium (diazepam) | 20–100, byproduct 36–200 | 10 mg | Up to three weeks |
Half-lives and equivalents from Professor Ashton's equivalence table.[4] Onset ranges from NHS guidance.[2] Equivalents are approximate and vary between people; they are not a dosing guide.
Phase by phase
Onset: hours to weeks
The first signs are usually a return of anxiety and trouble sleeping. With short-acting drugs this can happen within a day. With long-acting drugs the start is quieter and later, which is why people sometimes believe they have escaped withdrawal and then are caught off guard.[2]
The acute phase: the first weeks
This is usually the most intense stretch. Anxiety, insomnia, muscle tension, sensitivity to light and sound, and stomach symptoms are common. Professor Ashton noted that flu-like symptoms can appear within the first two weeks and last up to four.[3]
Waves and windows
Recovery is rarely a straight line. Many people move through "windows" of feeling well and "waves" when symptoms return for a while.[3] A wave is not a setback. It is a normal part of the process.
Settling: months
For most people, symptoms gradually fade. For long-term users, Professor Ashton wrote that withdrawal symptoms usually resolve within 6 to 18 months of the last dose.[5]
The long tail: protracted withdrawal
Some people have symptoms that last much longer than the acute phase. This is called protracted withdrawal.
- NHS guidance estimates it may affect up to 15 percent of people.[2]
- The FDA has reported withdrawal symptoms lasting many months in some patients.[6]
- A 2023 survey of 1,207 current and former users, published in PLOS ONE, found many respondents reporting symptoms that lasted a year or more.[7] The authors note its limits: it was a self-selected internet survey with no control group.
I want to say this plainly, because fear makes everything harder. Professor Ashton, who treated people in withdrawal for decades, wrote that although symptoms may persist, eventual recovery appears to be the rule.[3]
What lengthens or shortens the timeline
Speed of the taper. Professor Ashton observed that people who develop severe withdrawal have usually come off too quickly.[1] The 2025 joint guideline recommends starting with reductions of 5 to 10 percent every two to four weeks.[8]
Cold turkey. Stopping suddenly does not shorten withdrawal in any useful way. It increases the risk of seizures, which the FDA warns can be life-threatening.[6]
Sleep, food and stress. These do not change the pharmacology, but they change how much you can carry. This is why our program surrounds the taper with nutrition, sleep support and daily one-to-one care.
At Benzo Detox Protocol, most benzo guests stay about twelve weeks. The taper is medically supervised and paced to the individual, and in fifteen years no guest has had a seizure here. See how the twelve to sixteen weeks are structured.
Questions about the withdrawal timeline
How long does benzo withdrawal last?
Acute symptoms usually ease over several weeks. For long-term users, symptoms generally resolve within 6 to 18 months of the last dose, and a minority have symptoms for longer. A slow taper helps.
When is benzo withdrawal the worst?
Usually in the first weeks after a significant dose change. With long-acting drugs, the peak can come later than people expect.
What is protracted benzo withdrawal?
Symptoms that continue for months after the acute phase. NHS guidance estimates it may affect up to 15 percent of people. It does improve over time.
Does a faster taper mean a shorter withdrawal?
No. Faster reductions tend to cause more severe symptoms and raise the risk of seizures.
Sources
- Ashton CH. The Ashton Manual
- NHS Scotland. Benzodiazepines and Z-drugs: discontinuation and withdrawal symptoms
- Ashton CH. Benzodiazepine withdrawal: an update
- Ashton CH. Benzodiazepine Equivalence Table
- Ashton CH. Footnote to British National Formulary guidance (2013)
- FDA Drug Safety Communication: Boxed Warning for the benzodiazepine class (2020)
- Ritvo AD et al. Long-term consequences of benzodiazepine-induced neurological dysfunction: a survey. PLOS ONE (2023)
- Joint Clinical Practice Guideline on Benzodiazepine Tapering, Journal of General Internal Medicine (2025)