Cariprazine and Insulin Glargine, Recombinant: Interaction Details
AI-assisted, pharmacist-reviewed · AI content regenerated Jul 16, 2026 · Source data updated Jul 16, 2026 · Sources: FDA labeling, DDInter 2.0, cited literature
Cariprazine
Insulin Glargine, Recombinant
How we grade severity & evidence
Severity levels
- Contraindicated: These should generally not be used together.
- Major: Potentially serious — often needs a change or close monitoring.
- Moderate: Can be significant — usually manageable with monitoring.
- Minor: Usually limited clinical impact.
Evidence grades
- Established: Well documented — supported by controlled studies or strong clinical data.
- Probable: Good supporting evidence, though not definitively proven.
- Suspected: Some evidence suggests this interaction, but it is not well established.
- Possible: Limited or conflicting evidence; the interaction may occur.
- Theoretical: Predicted from the drugs' pharmacology; not yet confirmed in people.
Ratings come from the documented interaction literature and are reviewed by a pharmacist. They describe the documented risk of the combination, not what will necessarily happen to you — your dose, timing, and health picture all matter.
You've been prescribed Vraylar (cariprazine) along with your Lantus (insulin glargine). When these are used together, there may be a change in how your blood sugar behaves, and one concern is a higher chance of your sugar dropping too low (hypoglycemia). Low blood sugar can make you feel shaky, sweaty, dizzy, or confused.
I want to be honest with you: this concern is theoretical, meaning it hasn't been strongly proven, so please don't worry. The good news is your care team can handle this easily by checking your blood sugar a bit more often and fine-tuning your insulin dose if needed. Keep taking both as prescribed and let your doctor know how you're feeling.
Effect: Potential increased risk of hypoglycemia when cariprazine (an atypical antipsychotic) is coadministered with insulin glargine.
- Mechanism: Unknown. Neither agent is a prodrug relevant here; no clear PK interaction is defined. Atypical antipsychotics classically affect glucose homeostasis and metabolic parameters, so combined glycemic effects are plausible but not well characterized.
- Direction/magnitude: Altered glycemic control; hypoglycemia risk noted. Magnitude undefined.
- Onset: Unspecified.
- Evidence: Theoretical.
- Management: Increase frequency of blood glucose monitoring; insulin dose may need individualized adjustment. Counsel patient on hypoglycemia symptoms.
What happens
An increased risk of hypoglycemia
Interaction Deep Dive
When insulin glargine is taken together with atypical antipsychotics, the likelihood of hypoglycemia may rise. Coadministration of these agents may necessitate higher dosing along with more frequent glucose monitoring1.
Why it happens (mechanism)
Unknown
How to manage this interaction
Here's how a care team usually handles this combination:
- More frequent glucose checks, especially when starting or changing either medication, so any shifts are caught early.
- Individualized insulin dosing, your team may adjust your insulin dose based on your readings.
- Know the warning signs of low blood sugar (shakiness, sweating, dizziness, confusion) and how to treat it.
Keep taking both medications exactly as prescribed. Don't change any doses on your own. Bring your blood sugar log to appointments and ask your pharmacist or doctor if you notice more lows than usual.
Management is individual — confirm any change with your pharmacist or prescriber.
Common questions
Can I take Cariprazine and Insulin Glargine, Recombinant together?
Combining Vraylar (cariprazine) with insulin glargine may increase the chance of low blood sugar, so monitor your glucose more closely and let your care team fine-tune your insulin dose. Keep taking both as prescribed. Always confirm with your pharmacist or prescriber before making any change.
How serious is the Cariprazine and Insulin Glargine, Recombinant interaction?
It is rated major. Potentially serious — often needs a change or close monitoring.
How quickly could this interaction happen?
The documented onset is "unspecified". The timing of this interaction is not well characterized.
How is the Cariprazine and Insulin Glargine, Recombinant interaction managed?
Here's how a care team usually handles this combination: More frequent glucose checks, especially when starting or changing either medication, so any shifts are caught early. Individualized insulin dosing, your team may adjust your insulin dose based on your readings. Know the warning signs of low blood sugar (shakiness, sweating, dizziness, confusion) and how to treat it. Keep taking both medicat… Management is individual — always follow your own care team's guidance.
How strong is the evidence for this interaction?
The evidence is graded "theoretical". Predicted from the drugs' pharmacology; not yet confirmed in people.
Questions for your pharmacist
- Does my dose of Cariprazine or Insulin Glargine, Recombinant need adjusting while I take them together?
- What symptoms should prompt me to call you or my prescriber right away?
- Does the timing of my doses matter for this combination?
- Is there a safer alternative to one of these medications for me?
References (1)
- Product Information: LANGLARA™ subcutaneous injection, insulin glargine-aldy subcutaneous injection. Lannett Company, Inc, Philadelphia, PA, 2026. DailyMed
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