Yes, you can cut most trazodone tablets in half. Standard immediate-release trazodone tablets are manufactured with functional score lines specifically designed for splitting, and the FDA-approved labeling explicitly states they “can be swallowed whole or administered as a half tablet by breaking the tablet along the score line.” There is one important exception: extended-release formulations follow different rules.
Which Tablets Are Safe to Split
Immediate-release trazodone tablets come in 50 mg, 100 mg, 150 mg, and 300 mg strengths. All four have functional score lines, meaning the grooves aren’t just cosmetic. They’re tested to produce reasonably equal halves when you snap the tablet along the line.
The 50 mg and 100 mg tablets are round with a single score line down the middle, making them straightforward to break into two equal pieces. The 150 mg and 300 mg tablets are oval-shaped and more versatile. They have both a full bisect (splitting the tablet in half) and two partial trisects (splitting it into thirds). This means a 150 mg tablet can give you a 75 mg dose (half) or roughly a 50 mg dose (one-third), and a 300 mg tablet can yield 150 mg, 100 mg, or 200 mg portions depending on where you break it.
To split the tablet, simply press down on the score line with your thumbs or use a pill splitter. You don’t need any special tools, though a pill splitter can help produce cleaner halves. Do not chew or crush the tablets.
Extended-Release Trazodone Is Different
Extended-release trazodone (sometimes sold under the brand name Oleptro) is designed to release the medication slowly over several hours. This controlled-release mechanism lowers the peak concentration of the drug in your blood by about 20% compared to immediate-release tablets and delays it by roughly two hours. That slower absorption is what makes the extended-release version more tolerable, with fewer and less severe side effects, particularly drowsiness.
Crushing or breaking a controlled-release tablet can destroy this mechanism, releasing the full dose at once. This is called “dose dumping,” and with some medications it can cause dangerous spikes in blood levels. As a general rule, controlled-release drugs should never be cut, chewed, crushed, or dissolved unless the manufacturer specifically says otherwise. Interestingly, one study on the extended-release trazodone caplet found that splitting it did not significantly affect its controlled-release properties, but you should still follow whatever your pharmacist or prescriber advises for your specific product.
Why Splitting Is So Common With Trazodone
Trazodone works differently at different doses, which is why flexible dosing matters more for this drug than many others. At low doses (25 to 100 mg), it primarily blocks receptors involved in wakefulness, producing a sedating effect. This is the dose range commonly used for insomnia, even in people who aren’t depressed. At higher doses (150 to 600 mg), it also begins blocking serotonin reuptake, which is what produces its antidepressant effect.
Because many people take trazodone for sleep at doses like 25 mg or 50 mg, splitting a tablet is often part of standard dosing. Someone prescribed 25 mg for sleep, for example, would typically split a 50 mg tablet in half. The score lines exist precisely for this kind of flexibility. Dose adjustments during the early weeks of treatment are also common, and being able to go up or down in small increments by splitting tablets makes that process easier.
Storage After Splitting
The FDA labeling for trazodone doesn’t provide specific stability data for how long a split tablet remains effective. In practice, the unused half should be stored in a dry place at room temperature, away from moisture and light. A pill organizer or a small sealed container works fine. Most pharmacists recommend using the other half within a few days to a week rather than letting it sit indefinitely, since the exposed interior of the tablet lacks the coating that protects the whole pill.
If You Need Doses Smaller Than Half a Tablet
For people who need very precise or very small doses, trazodone is also available as a liquid formulation, typically at a concentration of 50 mg per 5 ml. This allows for fine-tuned dosing that’s hard to achieve by splitting tablets. Liquid trazodone is significantly more expensive than the tablet form, so it’s generally reserved for situations where tablets aren’t practical, such as difficulty swallowing or the need for doses that don’t correspond to any available tablet fraction. If you mix liquid trazodone with food to make it easier to take, it should be consumed immediately and never mixed with thickening agents, which can interfere with absorption.