Get emergency medical help if you have signs of an allergic reaction to Voltaren Arthritis Pain gel (hives, sneezing, runny or stuffy nose, wheezing or trouble breathing, swelling in your face or throat) or a severe skin reaction (fever, sore throat, burning eyes, skin pain, red or purple skin rash with blistering and peeling).
Although the risk of serious side effects is low when diclofenac is applied to the skin, this medicine can be absorbed through the skin, which may cause steroid side effects throughout the body.
Stop using Voltaren Arthritis Pain gel and seek emergency medical attention if you have signs of a heart attack or stroke: chest pain spreading to your jaw or shoulder, sudden numbness or weakness on one side of the body, slurred speech, feeling short of breath.
Also call your doctor at once if you have:
a skin rash, no matter how mild;
swelling, rapid weight gain;
severe headache, blurred vision, pounding in your neck or ears;
little or no urination;
liver problems - nausea, diarrhea, stomach pain (upper right side), tiredness, itching, dark urine, clay-colored stools, jaundice (yellowing of the skin or eyes);
low red blood cells (anemia) - pale skin, unusual tiredness, feeling light-headed or short of breath, cold hands and feet; or
signs of stomach bleeding - bloody or tarry stools, coughing up blood or vomit that looks like coffee grounds.
Common Voltaren Arthritis Pain gel side effects may include:
heartburn, gas, stomach pain, nausea, vomiting;
diarrhea, constipation;
headache, dizziness, drowsiness;
stuffy nose;
itching, increased sweating;
increased blood pressure; or
skin redness, itching, dryness, scaling, or peeling where the medicine was applied.
This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.
 Voltaren Arthritis Pain Gel side effects (more detail)
