• Fever

  […] stomach cramping and/or burning (severe) or pain backache bloody, black, or tarry stools cough or hoarseness darkening of the skin decrease in height decreased vision diarrhea dry mouth eye pain eye tearing facial hair growth in females fainting fatigue fever [mayoclinic.org]

• Pain

  […] muscle pain or tenderness muscle wasting or weakness nausea pain in the back, ribs, arms, or legs painful or difficult urination skin rash sleeplessness sweating trouble healing trouble sleeping unexplained weight loss unusual tiredness or weakness vision [mayoclinic.org]

• Congestive Heart Failure

  Make sure you tell your doctor if you have any other medical problems, especially: Blood clots or Cataracts or Congestive heart failure or Cushing's syndrome (adrenal gland problem) or Diabetes or Eye infection or Fluid retention or Glaucoma or Heart [mayoclinic.org]

• Cough

  […] swelling of the fingers, hands, feet, or lower legs trouble thinking, speaking, or walking troubled breathing at rest weight gain Incidence not known Abdominal or stomach cramping and/or burning (severe) or pain backache bloody, black, or tarry stools cough [mayoclinic.org]

• Loss of Appetite

  […] hair growth in females fainting fatigue fever or chills flushed, dry skin fractures fruit-like breath odor full or round face, neck, or trunk heartburn and/or indigestion (severe and continuous) increased hunger increased thirst increased urination loss [mayoclinic.org]

• Blurred Vision

  Check with your doctor right away if blurred vision, difficulty in reading, or any other change in vision occurs during or after treatment. Your doctor may want you to have your eyes checked by an ophthalmologist (eye doctor). [mayoclinic.org]

• Decrease in Height

  […] in height decreased vision diarrhea dry mouth eye pain eye tearing facial hair growth in females fainting fatigue fever or chills flushed, dry skin fractures fruit-like breath odor full or round face, neck, or trunk heartburn and/or indigestion (severe [mayoclinic.org]

• Agitation

  Check with your doctor immediately if any of the following side effects occur: More common Aggression agitation anxiety blurred vision decrease in the amount of urine dizziness fast, slow, pounding, or irregular heartbeat or pulse headache irritability [mayoclinic.org]

Dexamethasone tablets are also used in combination with other anti-myeloma products for the treatment of adults with multiple myeloma. This medicine is available only with your doctor's prescription. [mayoclinic.org]

Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects. [mayoclinic.org]