How long do the side effects of dextromethorphan hydrobromide syrup last?
Dec 04, 2025
Source: Cainiu Health
Dr. Ren Yi
Introduction
If the dose taken is too high or if the individual is particularly sensitive to the medication, more noticeable side effects such as nausea, constipation, and blurred vision may occur, which could take 3–5 days to subside. In such cases, a larger amount of the drug remains in the body, leading to prolonged effects that require time for complete metabolism. Drinking plenty of water and maintaining a light diet can help support recovery, allowing the side effects to gradually diminish.
Under normal circumstances, mild side effects of dextromethorphan hydrobromide syrup usually disappear within 1–2 days, while more noticeable side effects may take 3–5 days to resolve. If concerned, it is advisable to seek medical advice promptly. Detailed analysis is as follows:
If the dosage taken is appropriate and only mild side effects such as drowsiness, dry mouth, or dizziness occur, and if the individual has good metabolic function, these symptoms typically resolve within 1–2 days. These mild side effects are mostly caused by the drug's short-term action in the body. As the drug is gradually metabolized and eliminated, the body naturally returns to its normal state without causing significant health impact.
If an excessive dose is taken or the individual is particularly sensitive to the medication, more pronounced side effects such as nausea, constipation, or blurred vision may occur, which could take 3–5 days to subside. In such cases, a larger amount of the drug remains in the body, leading to prolonged effects. The side effects will gradually ease only after the drug is fully metabolized. Drinking plenty of water and maintaining a light diet can help support the body’s recovery process.
During use, strictly adhere to the recommended dosage to avoid overdose. Drink plenty of warm water if side effects occur to promote drug metabolism. If side effects persist beyond 5 days or worsen, discontinue the medication immediately and seek medical attention promptly to prevent delayed management.
