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When does desvenlafaxine become effective, and how long do the side effects last?

The effects of desvenlafaxine can start to be felt after 2 to 4 weeks, and its maximum effectiveness is usually seen after 3 to 6 weeks. Unfortunately, this type of medication may cause a slight increase in anxiety during the first 10 to 14 days, but this typically improves over time. If the medication makes you feel drowsy, it is recommended to take it in the evening. Otherwise, you can take it in the morning with food.