Side Effects of Oxybutynin ER

Oxybutynin Chloride ER Drug Information

Possible Side Effects of Oxybutynin ER

Oxybutynin ER has been studied thoroughly in clinical trials. In these studies, the side effects that occur in a group of people taking the drug are documented.

In these studies, the most common side effects of oxybutynin ER included:

Dry mouth -- in up to 61 percent of people (see Ditropan XL and Dry Mouth)
Constipation -- up to 13 percent (see Ditropan XL and Constipation)
Drowsiness -- up to 12 percent
Headaches -- up to 10 percent
Diarrhea -- up to 9 percent
Nausea -- up to 9 percent.

Other common oxybutynin ER side effects, occurring in 5 to 8 percent of people, included:

Weakness
Pain
Indigestion or heartburn
Dizziness
Blurred vision
Dry eyes
Bladder infection (urinary tract infection or UTI).

Less Common Oxybutynin ER Side Effects

There are other less common oxybutynin ER side effects that can occur. These side effects occur in 2 to 5 percent of people taking the drug. For these side effects, it is difficult to tell whether they are actually caused by oxybutynin ER or something else.

These less common oxybutynin ER side effects include, but are not limited to:

Abdominal pain (stomach pain)
Nasal dryness
Accidental injury
Back pain
Flu symptoms (such as fever, chills, or body aches)
High blood pressure (hypertension)
Feelings of a rapidly or forcefully beating heart (known as heart palpitations)
Flushing
Gas
Gastroesophageal reflux disease (GERD)
Arthritis
Insomnia
Nervousness
Upper respiratory tract infection (such as the common cold)
Cough
Sinus infection
Bronchitis
Sore throat
Dry skin.

(Side Effects of Oxybutynin ER Continued: Page 3)
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