Darifenacin Side Effects

Medically reviewed by Drugs.com. Last updated on Mar 27, 2025.

Applies to darifenacin: oral tablet extended release.

Common side effects of darifenacin

Some side effects of darifenacin may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects.

Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:

More common side effects

• acid or sour stomach
• belching
• difficulty having a bowel movement (stool)
• dry mouth
• heartburn
• indigestion
• stomach discomfort, upset, or pain

Less common side effects

• diarrhea
• dizziness
• dry eyes
• lack or loss of strength
• nausea

Incidence not known

• accidental injury
• bloating or swelling of the face, arms, hands, lower legs, or feet
• changes in vision
• chills
• congestion
• cough producing mucus
• difficulty with breathing
• difficulty with moving
• dry skin
• dryness or soreness of the throat
• fever
• general feeling of discomfort or illness
• headache
• hoarseness
• itching of the vagina or genital area
• itching skin
• joint pain
• loss of appetite
• muscle aches and pains
• muscle stiffness
• nervousness
• pain during sexual intercourse
• pain or tenderness around the eyes and cheekbones
• pounding in the ears
• rash
• runny nose
• shortness of breath or troubled breathing
• slow or fast heartbeat
• sneezing
• stuffy nose
• tender, swollen glands in the neck
• thick, white vaginal discharge with no odor or with a mild odor
• tightness in the chest
• tingling of the hands or feet
• trouble with swallowing
• unusual weight gain or loss
• voice changes
• vomiting
• wheezing

Serious side effects of darifenacin

Along with its needed effects, darifenacin may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.

Check with your doctor immediately if any of the following side effects occur while taking darifenacin:

Less common side effects

• bladder pain
• bloody or cloudy urine
• difficult, burning, or painful urination
• frequent urge to urinate
• lower back or side pain

Incidence not known

• decrease in the frequency of urination
• decrease in the urine volume
• difficulty in passing urine
• dribbling or painful urination

Get emergency help immediately if any of the following symptoms of overdose occur while taking darifenacin:

Symptoms of overdose

• changes in vision

For healthcare professionals

Applies to darifenacin: oral tablet extended release.

General adverse events

Most adverse events were mild or moderate and mostly occurred during the first 2 weeks of treatment.^[Ref]

Gastrointestinal

• Very common (10% or more): Dry mouth (up to 35%), constipation (up to 21%)
• Common (1% to 10%): Abdominal pain, nausea, dyspepsia, diarrhea
• Uncommon (0.1% to 1%): Vomiting, flatulence, mouth ulceration, hyperhidrosis
• Frequency not reported: Angioedema^[Ref]

Dermatologic

• Common (1% to 10%): Dry skin, pruritus, rash
• Postmarketing reports: Erythema multiforme, interstitial granuloma annulare^[Ref]

Respiratory

• Common (1% to 10%): Nasal dryness, bronchitis, respiratory tract infection, pharyngitis
• Uncommon (0.1% to 1%): Dyspnea, cough, rhinitis^[Ref]

Cardiovascular

• Postmarketing reports: Palpitations, syncope^[Ref]

Genitourinary

• Uncommon (0.1% to 1%): Urinary tract infection, urinary retention, urinary tract disorder, bladder pain, erectile dysfunction, vaginitis^[Ref]

Metabolic

• Uncommon (0.1% to 1%): Weight gain^[Ref]

Hepatic

• Uncommon (0.1% to 1%): Aspartate aminotransferase increased, alanine aminotransferase increased^[Ref]

Hypersensitivity

• Postmarketing reports: Generalized hypersensitivity reactions including angioedema^[Ref]

Immunologic

• Common (1% to 10%): Influenza syndrome^[Ref]

Musculoskeletal

• Common (1% to 10%): Back pain
• Uncommon (0.1% to 1%): Arthralgia^[Ref]

Nervous system

• Very common (10% or more): Headache
• Uncommon (0.1% to 1%): Dizziness, dysgeusia, somnolence^[Ref]

Ocular

• Common (1% to 10%): Dry eye
• Uncommon (0.1% to 1%): Visual disturbance, blurred vision^[Ref]

Other

• Uncommon (0.1% to 1%): Edema, peripheral edema, face edema, asthenia, aspartate aminotransferase increased, alanine aminotransferase increased, accidental injury, pain^[Ref]

Psychiatric

• Uncommon (0.1% to 1%): Insomnia, abnormal thinking
• Postmarketing reports: Depressed mood, altered mood, hallucination^[Ref]

Further information

Darifenacin side effects can vary depending on the individual. Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.

Note: Medication side effects may be underreported. If you are experiencing side effects that are not listed, submit a report to the FDA by following this guide.

Medical Disclaimer