How long does it take for diazepam to take effect?

Diazepam, also known as Valium, is a commonly used sedative-hypnotic medication, and its onset of action varies due to individual differences. Generally, after oral administration, diazepam is rapidly absorbed and reaches peak plasma concentration approximately 0.5 to 2 hours post-administration, after which it exerts its therapeutic effects such as anxiolysis, sedation, and sleep induction. Specifically, for individuals with good gastrointestinal absorption and mild symptoms, effects may be felt within 30 to 45 minutes after taking the medication. For those with poor gastrointestinal absorption or more severe symptoms, it may take 45 to 60 minutes or longer for the effects to manifest. Each patient's physical condition, severity of illness, and sensitivity to the drug can vary, so the exact onset time may differ accordingly.

Diazepam has a long half-life, and long-term use may lead to accumulation in the body, as well as the potential for dependence and addiction. Therefore, diazepam must be used strictly according to medical instructions; patients should not increase the dosage or prolong treatment without consulting a physician. Additionally, the dosage and duration of diazepam therapy may vary depending on the specific disease and symptoms, and patients should undergo individualized treatment under a doctor's guidance.