Aclonac 100 is a pain relieving medicine. It alleviates pain and inflammation in conditions like rheumatoid arthritis, ankylosing spondylitis and osteoarthritis. Aclonac 100 should be taken in the dose and duration as advised by your doctor. It should be taken with food or milk to prevent stomach upset. Taking the medicine regularly at the right times increases its effectiveness. It is important to keep taking the medicine regularly until your doctor tells you it is safe to stop. Vomiting, stomach pain, nausea, and indigestion are some of the common side effects that might be observed on taking this medicine. It may also cause dizziness, drowsiness, or visual disturbances. Your doctor may regularly monitor your kidney function, liver function, and levels of blood components if you are taking this medicine for long-term treatment. Long-term use may lead to serious complications such as stomach bleeding and kidney problems. Aclonac 100 is not recommended if you are pregnant or breastfeeding.