How long does it take for obeticholic acid to be metabolized after taking one tablet?

Obeticholic acid(Obeticholic acid) is an FXR agonist that acts on the hepatobiliary system. Its metabolic process is relatively complex and is mainly completed through the liver and intestinal circulation. After oral administration, the drug is rapidly absorbed and converted in the liver to its active metabolite, obeticholic acid glucuronide conjugate (OCA-G). This metabolite has similar or even stronger receptor activity than the original drug, and can be excreted into the intestine through bile and absorbed again, forming the so-called "enterohepatic circulation", which prolongs the drug's action time.

According to pharmacological research data, the half-life of obeticholic acid is approximately between 40 and 70 hours, with large individual differences and depending on the patient's liver function status, metabolic capacity and intestinal flora. For patients with normal liver function, it will take about 7 to 10 days to basically complete the elimination of the drug and its metabolites after taking one tablet. If the patient has mild or moderate hepatic impairment, the drug clearance rate will be significantly reduced and the half-life may be extended to more than 100 hours. Therefore, doctors usually adjust the frequency and dosage of medication according to the patient's liver function class (Child-Pugh class).

In addition, the main metabolic pathway of obeticholic acid is conjugation and metabolism in the liver and is not excreted by the kidneys. Therefore, impaired renal function has little effect on drug metabolism. However, it should be noted that this drug will cause an increase in bile acid levels, which may induce uncomfortable reactions such as itching and fatigue. Therefore, if obvious side effects occur while taking the medication, you should consult your doctor whether you need to adjust the dose or extend the medication interval.

In summary, obeticholic acid is a long-acting, slowly metabolized drug, and one pill may continue to work in the body for several days. Patients should maintain regular medication when using it and avoid increasing or decreasing the dosage or frequently changing the medication time on their own to ensure the stability and sustained efficacy of the drug in the liver metabolic balance.

Reference materials:https://en.wikipedia.org/wiki/Obeticholic_acid