Citalopram is an antidepressant medication that belongs to a class of drugs called selective serotonin reuptake inhibitors (SSRIs). The most common side effects of citalopram 20 mg are usually mild and tend to go away on their own within a few weeks of starting the medication. Some of the most common side effects of citalopram 20 mg include:

Nausea: This is one of the most common side effects of citalopram and is usually mild and goes away on its own after a few days.

Headache: Headache is another common side effect of citalopram and can be relieved by over-the-counter pain relievers.

Drowsiness: Citalopram can cause drowsiness in some people, especially in the first few weeks of treatment. This side effect usually goes away as your body adjusts to the medication.

Insomnia: Some people may experience difficulty sleeping when taking citalopram, particularly in the first few weeks of treatment. This side effect usually goes away on its own after a few weeks.

Sexual problems: Citalopram can cause sexual side effects, such as decreased libido, impotence, and delayed orgasm. These side effects are usually temporary and go away once treatment is stopped.

Dry mouth: This is a common side effect of citalopram and can be relieved by drinking plenty of fluids or using a saliva substitute.

Diarrhea: Citalopram can cause diarrhea in some people, but this side effect usually goes away on its own after a few days.

Tremors: Some people may experience tremors or shaking when taking citalopram, but this side effect is usually mild and goes away on its own after a few weeks.

In conclusion, the side effects of citalopram 20 mg are usually mild and go away on their own after a few weeks. If you experience any severe or persistent side effects, you should contact your healthcare provider for further evaluation and treatment.