Col 200mg Injection belongs to a group of medicines called antiplatelet medicines or blood thinners. It helps your blood flow more easily and prevents formation of harmful blood clots, thus preventing stroke. Col 200mg Injection reduces the risk of having another stroke, especially in a patient who has already had a stroke earlier. It can be used alone or in combination with other medicines. It is given as an injection under the supervision of a doctor. You can reduce your risk of having a blood clot by making changes to your lifestyle, such as not smoking, eating a healthy diet, getting regular exercise and losing weight if you need to. The most common side effects of Col 200mg Injection are nausea, vomiting, diarrhea, and decreased white blood cell count. Most of these are temporary and usually resolve with time. Contact your doctor straight away if you are at all concerned about any of these side effects. This medicine is not suitable for some people. Do not use it if you are bleeding, you have had a stroke caused by bleeding in the brain, have problems with your liver, or if you are taking certain medicines. This medicine may need to be stopped temporarily before planned surgery or dental treatment.