Final answer:
The therapeutic levels of fluoxetine can take 2-4 weeks to be effective.
Step-by-step explanation:
The therapeutic levels of fluoxetine, a medication used to treat depression and anxiety, can take between 2-4 weeks to reach the desired effect.
This is because fluoxetine is a time-dependent drug, meaning it is more effective when lower optimum levels are maintained over a longer period of time. It takes time for the drug to build up in the body and reach the desired therapeutic levels for maximum effectiveness.
Although it may take several weeks to see improvement with fluoxetine, it is important for the client to continue taking the medication as prescribed and to follow up with their healthcare provider regularly.