Side Effects of Mirtazapine (Cont.)

Mirtazapine (Remeron)

Common Side Effects Seen With Mirtazapine

Mirtazapine has been studied thoroughly in clinical trials, in which the side effects of a group of people taking the drug are documented and compared to another group not taking the medicine. As a result, it is possible to see what side effects occur, how often they appear, and how they compare to the group not taking the medicine.

In these studies, the most common mirtazapine side effects included:

Drowsiness -- in up to 54 percent of people
Dry mouth -- up to 25 percent (see Remeron and Dry Mouth)
Increased appetite -- up to 17 percent
High cholesterol -- up to 15 percent
Constipation -- up to 13 percent
Weight gain -- up to 12 percent (see Remeron and Weight Gain)
Weakness -- up to 8 percent
Dizziness -- up to 7 percent
High triglycerides -- up to 6 percent.

Other common side effects (occurring in 1 to 5 percent of people) included:

Flu-like symptoms (such as fever or chills)
Abnormal dreams
Abnormal thinking
Shakiness (tremors)
Muscle pain
Frequent urination
Confusion
Back pain
Fluid retention (edema)
Difficulty breathing.

Rare Side Effects of Mirtazapine

Rare side effects occur in less than 1 percent of people taking mirtazapine. Because these side effects are so uncommon, it is difficult to tell whether they are because of the medication or something else.

Some of these rare side effects of mirtazapine include but are not limited to:

Sensitivity to the sun
Migraine headaches
Canker sores
Hypothyroidism (low thyroid)
Weight loss
Urinary tract infections (bladder infections)
Seizures
Hiccups
Asthma
Hair loss
Sexual side effects, such as changes in sex drive, impotence (erectile dysfunction or ED), or ejaculation problems (see Remeron Sexual Side Effects).

(Side Effects of Mirtazapine Continued: Page 3)
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Written by/reviewed by: Kristi Monson, PharmD; Arthur Schoenstadt, MD

Last reviewed by: Kristi Monson, PharmD;

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