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How long does it take for Rexulti to work?

Medically reviewed by Leigh Ann Anderson, PharmD. Last updated on Oct 20, 2020.

Official Answer

by Drugs.com

Rexulti (generic name: brexpiprazole) is an atypical antipsychotic used to treat adults with schizophrenia or depression. In Rexulti studies, some people started to see results 1 or 2 weeks after starting treatment, but the best results were seen at the end of 6 weeks.

Rexulti is an oral tablet you take once a day with or without food. Your doctor will slowly increase your dose over a few weeks to see how well you respond to and tolerate the medication.

When will Rexulti start to work for me?

How long it takes for you to respond to Rexulti treatment may be different from others.

  • Your treatment result depends upon your dose, your condition and the severity of your symptoms.
  • Always keep your appointments with your doctor so you can discuss how you are feeling and any side effects you may be having with Rexulti.
  • Your doctor will slowly increase your Rexulti dose over a few weeks to determine the best dose for you.

How long does Rexulti stay in my system?

Rexulti can stay in your system a long time. It has a long half-life, which is the amount of time it takes for a drug level to be reduce in your system by one half. The half-life of brexpiprazole, the active ingredient in Rexulti, is about 91 hours. It usually takes 5 half-lives for a drug to be mostly eliminated from your body, so this equates to roughly 455 hours or 18 to 19 days for Rexulti.

Drugs that long half lives like Rexulti have an advantage as they can often be dosed once a day and blood levels remain more steady. But if you experience any side effects with Rexulti, and your doctor determines you should stop treatment, it may take longer for the side effect to subside. Do not stop treatment unless specifically directed by your doctor.

Your doctor may need to adjust your dose of Rexulti if:

  • you have kidney or liver disease
  • you have a certain genetic alteration (CYP2D6 poor metabolizers) that can affect how Rexulti is metabolized (broken down for excretion from your body)
  • you are at risk for certain drug interactions that can increase or lower Rexulti blood levels. This can put you at risk for side effects or lower drug effectiveness.

Follow your doctor’s prescribed dosing instructions exactly.

Be sure to tell your doctor or pharmacist about all of the medications you use, including prescription and over-the-counter (OTC) medicines, vitamins, and herbal products. Your doctor or pharmacist will review your medicines for drug interactions while you are taking Rexulti.

Bottom Line

  • Rexulti (generic name: brexpiprazole) is an atypical antipsychotic used to treat adults with schizophrenia or depression.
  • In Rexulti studies, some people started to see results 1 or 2 weeks after starting treatment, but the best results were seen at the end of 6 weeks.
  • Your doctor will slowly increase your Rexulti dose over a few weeks to determine the best dose for you.

This is not all the information you need to know about Rexulti (brexpiprazole) for safe and effective use. Review the full Rexulti information here, and discuss this information and any questions with your doctor or other health care provider.

References
  • Rexulti (brexpiprazole) [product information]. Otsuka Pharmaceutical Co. Rockville, MD. March 2020. Accessed Oct. 19, 2020 at https://www.otsuka-us.com/media/static/Rexulti-PI.pdf
  • Jibson M, et al. Second-generation antipsychotic medications: Pharmacology, administration, and side effects. Up to Date. Accessed Oct. 20, 2020 at https://www.uptodate.com/contents/second-generation-antipsychotic-medications-pharmacology-administration-and-side-effects
  • Rexulti.com. Efficacy data for Rexulti. Accessed Oct. 19, 2020 at https://www.rexultihcp.com.

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