Can lorazepam be used with lacosamide or divalproex?
In real-world practice, some clinicians do use lorazepam short-term alongside antiseizure medicines, but it depends on why the person needs lorazepam (for example, anxiety, sleep, or as rescue treatment during a seizure cluster). Lorazepam is a benzodiazepine that can calm the nervous system, but it also increases sedation.
For both lacosamide and divalproex, the main concern is additive effects on the brain and breathing risk with other sedating drugs.
What side effects might happen if you take lorazepam with lacosamide?
Common “stacking” effects from combining a benzodiazepine (lorazepam) with an antiseizure medication like lacosamide include:
- More drowsiness or dizziness than either drug alone
- Poor coordination, unsteady walking, or falls
- Slower reaction time
More serious red flags (especially if doses are higher, the person is older, or there are other sedating medicines) include:
- Excessive sleepiness that is hard to wake someone from
- Confusion
- Trouble breathing
What side effects might happen if you take lorazepam with divalproex?
With divalproex, the same general benzodiazepine stacking risks apply:
- Increased sedation and sleepiness
- Dizziness or unsteadiness
- Slowed thinking or confusion
Also consider that divalproex has its own possible adverse effects (for example, tremor, nausea, weight change, and liver-related issues). Adding lorazepam can make it harder to notice or interpret side effects because sedation can mask changes in alertness.
What medicines should not be combined because they raise breathing/sedation risk?
Even if lacosamide or divalproex are safe with lorazepam in many cases, the risk rises sharply if lorazepam is taken with other substances that depress the central nervous system, such as:
- Alcohol
- Opioid pain medicines (like oxycodone, hydrocodone, morphine)
- Other sedatives/sleep medicines
- Some antihistamines (like diphenhydramine) that cause strong drowsiness
Combining these can increase the risk of severe sedation and breathing problems.
Could lorazepam stop working, or could withdrawal be a problem?
Yes. If lorazepam is used regularly (especially for more than a short period), tolerance can develop and stopping suddenly can cause withdrawal symptoms such as:
- Anxiety, agitation
- Tremor
- Seizures (in some people)
That means lorazepam dose changes should usually be guided by the prescriber.
When is lorazepam most often used with seizure medicines?
Lorazepam is commonly used:
- Short-term during seizure clusters or prolonged seizures (as a “rescue” plan), or
- Temporarily while adjusting antiseizure medication doses, if anxiety or insomnia is an issue.
If the goal is long-term daily use for seizure control, prescribers often reconsider whether a benzodiazepine is the best long-term option due to sedation and dependence risks.
What should you do if someone is already on all three?
Do not change doses on your own. Instead:
- Check with the prescribing clinician/pharmacist about whether the lorazepam is intended to be short-term or ongoing
- Ask for a specific safety plan (what symptoms mean “call now” versus “seek emergency care”)
- Avoid alcohol and other sedating medicines unless the clinician specifically says it is okay
Get urgent help if any of these happen
Seek emergency care or call local emergency services if there is:
- Slow or difficult breathing
- Unresponsiveness or cannot be awakened
- Severe confusion or repeated falls
- Suspected overdose (especially with alcohol or opioids)
If you tell me the person’s age, lorazepam dose (e.g., 0.5 mg, 1 mg), how often it’s taken, and the reasons it was started (seizure rescue vs anxiety vs sleep), I can help you understand the most likely risks to watch for and what to ask the prescriber.