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Lorazepam Taper Calculator: Gradual Lorazepam Dose Cuts, Step by Step

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In short: Lorazepam (Ativan) has a half-life of 10 to 20 hours in Table 1 of the Ashton Manual, and 1 mg of it is roughly equal to 10 mg of diazepam (Valium).

  • The Manual’s method switches lorazepam to diazepam gradually, one dose at a time, then reduces the diazepam by up to one tenth of the dose at each step. The Ashton Manual Guide calculator sketches that route.
  • This calculator plans a direct lorazepam taper instead. It takes one number, the current total daily dose, and cuts about one twentieth of the current dose at each step while tablet pieces allow, rounded to a whole tablet piece and never more than one tenth. Below about 3.75 mg a day one twentieth rounds to a single quarter tablet, so each step is one quarter of a 0.5 mg tablet (0.125 mg) and the cut grows toward one tenth of the dose. The tablet rows stop at 1.125 mg, where a quarter tablet would be more than one tenth, and the schedule hands over to a liquid form of lorazepam from there. Each step lasts one to two weeks or longer, and the pace belongs to the person tapering and their prescriber. The schedule shows the total daily dose. When lorazepam is taken several times a day, the daytime doses are usually reduced first and the night-time dose is kept until last, the pattern the Manual’s schedules follow once the diazepam dose is being reduced, and which dose each cut comes from is decided with the prescriber.
  • The Manual notes that with lorazepam, blood levels rise and fall between doses, and many people feel a “mini-withdrawal” before the next one.

Lorazepam Tapering Calculator

An illustrative tapering schedule built from tablet pieces

Use a decimal point for fractions of a milligram, for example 1.5. The smallest tablet piece is a quarter tablet (0.125 mg).
How the schedule ends: This calculator builds each step from tablet pieces, and the smallest piece is a quarter of a tablet (never finer). It aims at about one twentieth of the dose while tablet pieces allow; at lower doses each step is one quarter tablet, so the share of each cut grows toward one tenth. It uses tablets while a quarter tablet stays within one tenth of the daily dose, names the tablet strength to have filled (one strength while no day needs more than four whole tablets, otherwise one larger strength taken whole with the smallest strength for the remainder), and starts from the dose you enter. Where tablets cannot make a step that small, the tablet schedule stops and the taper continues on a liquid. A liquid carries the taper further in smaller steps: a manufactured lorazepam oral solution (2 mg in each mL) exists in the United States, a compounding pharmacy can prepare a more dilute liquid, and some people switch gradually to diazepam (Valium) oral solution instead. Liquid doses are measured with an oral syringe. On the liquid the taper continues in steps of one tenth or less until the dose is small enough that stopping is no bigger a step than the ones before, so the last step feels like any other step. Which route, and how fast, is decided with your prescriber.

This calculator is an educational planning tool. It is not medical advice and it is not a substitute for supervision by a physician who knows your history. Whether to taper, and how fast, are decisions for you and your prescriber. Never stop a benzodiazepine abruptly.

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Understanding Lorazepam and Why Gradual Dose Reduction Matters

Lorazepam is a benzodiazepine commonly prescribed for anxiety, insomnia, and seizure conditions. While it can be effective for short-term symptom relief, long-term use may lead to physical dependence. Stopping suddenly or reducing too quickly can trigger withdrawal symptoms such as heightened anxiety, sleep disruption, and physical discomfort, making a structured plan essential for both safety and stability.

The calculator on this page lays out small cuts from one number, the current daily dose: about one twentieth of the dose while tablet pieces allow, then single quarter-tablet steps that grow toward one tenth. That shape fits Professor Ashton’s principle of slow, gradual reduction, but it is not the Manual’s own method, which switches lorazepam to diazepam first and then tapers the diazepam. The Ashton Manual Guide calculator sketches that route.

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What This Lorazepam Taper Calculator Does

The calculator on this page builds an illustrative reduction schedule from a single number, the current total daily dose of lorazepam in milligrams. It asks nothing else. Where lorazepam is taken several times a day, the daytime doses are usually reduced first and the night-time dose is kept until last, as the Manual’s own schedules do once the diazepam dose is being reduced, with the prescriber deciding which dose each cut comes from.

  • Takes one input, your current total daily dose in milligrams, and starts from the dose entered; when that is not an exact tablet dose, the first step moves to the nearest tablet dose below it, and the summary says so (a quarter of a 0.5 mg tablet, 0.125 mg, is the smallest piece)
  • Cuts about one twentieth of the current dose at each step while tablet pieces allow, then one quarter tablet (0.125 mg) per step below about 3.75 mg a day, never more than one tenth, using one tablet strength while no day needs more than four whole tablets (0.5 mg tablets alone for starting doses up to about 2.375 mg a day), otherwise whole 2 mg tablets with 0.5 mg tablets for the remainder, dropping the 2 mg tablet once the dose is below it, and naming the tablets to have filled above the table
  • Lists every step as lasting one to two weeks or longer, with holding at a step as part of the method
  • Stops the tablet rows at 1.125 mg, where a quarter tablet would already be more than one tenth of the dose, and hands the rest of the taper to a liquid form of lorazepam

Every schedule this calculator produces is a planning sketch, to be reviewed with the prescriber before any reduction begins.

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Tapering Methods and Reduction Strategies

Three general approaches to tapering are described below as education. The calculator on this page uses one of them, percentage-based reduction built from tablet pieces; the other two are included for comparison and are not settings the tool offers.

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Linear Tapering

  • Cuts the dose by the same amount each time, for example 0.25 mg every two weeks. This calculator's lower tablet rows take this shape, one quarter tablet (0.125 mg) per step below about 3.75 mg a day, kept within one tenth of the dose by the handover to a liquid at 1.125 mg.
  • Straightforward to track, though final stages may feel more intense as withdrawal sensitivity increases.
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Percentage-Based Tapering

  • Lowers the dose by a roughly constant fraction, so the cuts shrink as the dose falls. This calculator aims for that shape, about one twentieth of the current dose per step, while tablet pieces allow; below about 3.75 mg a day every step is the same quarter tablet (0.125 mg), the fixed shape, and its share of the dose grows toward one tenth, which is why the tablet rows hand over to a liquid at 1.125 mg.
  • Close to the Ashton Manual's own guidance of reducing by up to one tenth of the dose at each step, with smaller cuts as the dose comes down.
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Micro-Tapering

  • Uses very small, frequent reductions, usually with a liquid form of the medication measured with an oral syringe. This calculator does not plan micro-tapers; it works in whole tablet pieces.
  • It usually takes longer overall and may suit people who are very sensitive to each change.
Medicine Tablets On White Background

Lorazepam’s Potency & Half-Life Considerations

  • Lorazepam is a potent, short-acting benzodiazepine, with a half-life of 10 to 20 hours in Table 1 of the Ashton Manual, so its blood level peaks and falls between doses rather than declining smoothly.
  • Careful pacing helps stabilize the nervous system and supports safer benzo tapering overall.
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Why Proper Lorazepam Tapering Matters

Lorazepam works by enhancing GABA activity in the brain, helping calm the nervous system during periods of anxiety or distress. Over time, however, the body adjusts to its presence. When the medication is reduced too quickly, withdrawal symptoms can appear, including rebound anxiety, sleep disruption, and physical discomfort that may impact daily stability.

A gradual, planned reduction gives the nervous system time to adapt instead of being asked to adjust all at once. The schedule on this page is one illustration of that shape, to be adjusted with the prescriber. This site also has taper calculators for alprazolam (Xanax), clonazepam (Klonopin) and diazepam (Valium), a general benzodiazepine taper calculator, and the Ashton Manual Guide calculator for the diazepam crossover route.

Read the Tapering Guides

Managing Common Challenges

Realistic pacing keeps withdrawal manageable. The guides on this site explain how to read symptoms and adjust a structured lorazepam taper plan accordingly.

Symptoms After a Cut

Some people notice symptoms that linger after a dose reduction. Healing after a cut takes time, and a slower pace or a hold gives the nervous system room to settle.

Plateaus During Tapering

Temporary pauses are common during dose reductions. Holding the current level longer, or making smaller cuts, reduces stress on the nervous system while maintaining steady progress.

After the Last Dose

Some symptoms can linger for months after the last dose. The Ashton Manual calls these protracted symptoms, says they are much less common after a slow taper the person controls, and says they decline in severity over the years. Keeping in touch with the prescriber during those months is recommended.

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Questions About the Lorazepam Taper Calculator

How does a lorazepam taper calculator handle dose sensitivity?

It does not. The calculator takes one number, the current total daily dose, and plans the same proportional steps for everyone. Sensitivity to dose changes is handled by the person tapering and their prescriber, usually by holding a step longer or by moving to a liquid form of lorazepam that allows smaller cuts than a quarter tablet.

The schedule is the same whatever the length of use. The calculator does not ask how long lorazepam has been taken or how earlier dose changes went; it plans from the current daily dose alone. Someone who has taken lorazepam for years may need longer holds than the one to two weeks listed for each step, and many tapers take a year or longer. Those decisions are made with the prescriber.

Not within this tool. The calculator works in whole tablet pieces, and the smallest piece it uses is a quarter of a 0.5 mg tablet (0.125 mg), so it cannot plan cuts smaller than that. Very small, frequent reductions need a liquid form of lorazepam measured with an oral syringe, and the schedule hands over to a liquid once a tablet piece can no longer keep a step within one tenth of the dose. Whether a liquid is the right route, and how fast to go on it, is decided with the prescriber.

It can show what a gradual schedule looks like. Each step removes about one twentieth of the current dose while tablet pieces allow; below about 3.75 mg a day each step is one quarter tablet (0.125 mg), a cut that grows toward one tenth of the dose and never passes it. Every step is listed as lasting one to two weeks or longer. The pace itself belongs to the person tapering and their prescriber. If symptoms flare, the method is to stay at the current dose until they settle before the next step, never to speed up to catch up.

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