It will take several days for your body to return to normal after stopping taking Cycloserine.

Cycloserine (Cycloserine) is a second-line antibiotic commonly used in the treatment of tuberculosis, especially multi-drug-resistant tuberculosis (MDR-TB). It works by inhibiting bacterial cell wall synthesis. Since its mechanism of action is not limited to germs, but may also affect the central nervous system, special attention must be paid to neuropsychiatric side effects during use, such as anxiety, insomnia, irritability and even hallucinations.

The metabolism time of cycloserine in the body is relatively short. The plasma half-life is generally about 6 to 10 hours. Most drugs will be excreted with urine within 24 to 48 hours. Therefore, from a pharmacokinetic perspective, the drug concentration in the body will drop significantly two or three days after stopping the drug, and the bodies of most patients will gradually begin to return to normal physiological conditions. However, the speed of recovery is also affected by factors such as individual differences, liver and kidney function, and dosage.

For some patients who develop significant neuropsychiatric symptoms while taking cycloserine, the recovery time after stopping the drug may be longer. Although the drug is rapidly metabolized and eliminated from the body, recovery of the central nervous system may take longer, usually ranging from 3 days to 1 weeks. During this period, symptoms may gradually lessen, but individual patients may still have mild mood swings or sleep problems. It is recommended to cooperate with a doctor to evaluate whether symptomatic supportive treatment is needed.

In general, most people can feel significant physical recovery within 3 to 5 days after stopping cycloserine, especially the side effects are significantly reduced. If symptoms do not improve after more than a week, or if mental symptoms continue to worsen, you should seek medical attention promptly to evaluate whether further intervention is needed. Patients should follow the doctor's guidance during use and discontinuation of medication, and should not increase or decrease the dose on their own or stop medication suddenly.

Reference:https://en.wikipedia.org/wiki/Cycloserine