What happens when I stop taking Tecfidera? However, if you stop taking Tecfidera, it’s possible that your MS may flare up. This means you may have new or worsening symptoms of MS. Even though withdrawal side effects aren’t likely, talk with your doctor before you stop taking Tecfidera.
Is there a washout period for Tecfidera? Most experts often prefer a short washout period (4–8 weeks) in order to avoid such risk. The risk of relapse after natalizumab cessation and switch to DMF is unknown.
How long does it take Tecfidera to get in your system? Tecfidera starts to work within 24 weeks; however, it may take up to two years for the full effects to be seen. Studies report that after 2 years, people taking Tecfidera were: 44% to 53% less likely to relapse every year when taking Tecfidera compared with those taking placebo.
Will Tecfidera show up on a drug test? TECFIDERA may cause proteins (such as albumin) to be detected in a urine test. TECFIDERA may also cause increases in the level of liver enzymes that will show up in a blood test.