CYCLOBENZAPRINE will add to the effects of alcohol and other CNS depressants (medicines that slow down the nervous system, possibly causing drowsiness). Some examples of CNS depressants are antihistamines or medicine for hay fever, other allergies, or colds; sedatives, tranquilizers, or sleeping medicine; prescription pain medicine or narcotics; barbiturates; medicine for seizures; other muscle relaxants; or anesthetics, including some dental anesthetics. Check with your doctor before taking any of the above while you are using CYCLOBENZAPRINE .

CYCLOBENZAPRINE may cause some people to have blurred vision or to become drowsy, dizzy, or less alert than they are normally. Make sure you know how you react to CYCLOBENZAPRINE before you drive, use machines, or do anything else that could be dangerous if you are dizzy or are not alert and able to see well.

Cyclobenzaprine may cause dryness of the mouth. For temporary relief, use sugarless candy or gum, melt bits of ice in your mouth, or use a saliva substitute. However, if your mouth continues to feel dry for more than 2 weeks, check with your medical doctor or dentist. Continuing dryness of the mouth may increase the chance of dental disease, including tooth decay, gum disease, and fungus infections.

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

The following side effects may mean that you are having a serious allergic reaction to the medicine. Get emergency help right away if any of them occur:

• Rare
  • Changes in the skin color of the face;  fast or irregular breathing;  large swellings that look like hives on the face, eyelids, mouth, lips, and/or tongue;  puffiness or swelling of the eyelids or the area around the eyes ;  shortness of breath, troubled breathing, tightness in chest, and/or wheezing;  skin rash, hives, or itching  
  
  

Also, check with your doctor immediately if any of the following side effects occur:

• Rare
  • Fainting 
  
  

• Symptoms of overdose
  • Convulsions (seizures);  drowsiness (severe) ;  dry, hot, flushed skin;  fast or irregular heartbeat;  hallucinations (seeing, hearing, or feeling things that are not there);  increase or decrease in body temperature;  troubled breathing;  unexplained muscle stiffness;  unusual nervousness or restlessness (severe);  vomiting (occurring together with other symptoms of overdose) 
  
  

Also, check with your doctor as soon as possible if any of the following side effects occur:

• Rare
  • Clumsiness or unsteadiness;  confusion ;  mental depression or other mood or mental changes ;  problems in urinating;  ringing or buzzing in the ears;  skin rash, hives, or itching occurring without other symptoms of an allergic reaction listed above;  unusual thoughts or dreams;  yellow eyes or skin 
  
  

Other side effects may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. However, check with your doctor if any of the following side effects continue or are bothersome:

• More common
  • Blurred vision;  dizziness or lightheadedness ;  drowsiness;  dryness of mouth 
  
  

• Less common or rare
  • Bloated feeling or gas, indigestion, nausea or vomiting, or stomach cramps or pain;  constipation;  diarrhea;  excitement or nervousness;  frequent urination;  general feeling of discomfort or illness;  headache;  muscle twitching;  numbness, tingling, pain, or weakness in hands or feet;  pounding heartbeat ;  problems in speaking;  trembling;  trouble in sleeping;  unpleasant taste or other taste changes;  unusual muscle weakness;  unusual tiredness 
  
  

Other side effects not listed above may also occur in some patients. If you notice any other effects, check with your doctor.

Once a medicine has been approved for marketing for a certain use, experience may show that it is also useful for other medical problems. Although this use is not included in product labeling, cyclobenzaprine is used in certain patients with fibromyalgia syndrome (also called fibrositis or fibrositis syndrome).

There is no additional information relating to proper use, precautions, or side effects for this use of cyclobenzaprine.