Physicians may prescribe mefenamic acid for the treatment of moderate or mild pain, including that related to cramps from menstrual cycles, MayoClinic.com reports. This medication, known by the Canadian brand name Apo-Mefenamic, classifies as a non-steroidal anti-inflammatory drug, or NSAID. It works by reducing inflammation that causes pain. Some side effects have been associated with use of Apo-Mefenamic.
Bleeding
Apo-Mefenamic can cause several types of bleeding as side effects that classify as serious and common. For example, the person taking the medication may discover blood in the urine during urination, or the evidence of blood in the stools. This may take the form of stools that appear black and they may have the consistency of tar. Abnormal bleeding also can manifest as an increase in the length of time blood flows from cuts and other wounds. Excessive bleeding may additionally present itself as abnormal bruises on the body that appear severe or do not heal quickly. MayoClinic.com recommends immediate physician consultation if any such bleeding side effects occur.
Hypertension
Because Apo-Mefenamic may cause accelerated heartbeat, a condition known as tachycardia, it can result in an adjunct increase in blood pressure, MayoClinic.com states. That organization indicates high blood pressure or hypertension caused as a side effect of taking Apo-Mefenamic needs medical help immediately. Hypertension can cause heart attacks.
Weight Changes
Also categorized as serious common side effects of mefenamic acid are weight changes. The person's weight may increase or decrease while using this medicine. Weight loss associated with changes in appetite is a common, serious side effect of Apo-Mefenamic. Some users gain weight, however, and may experience bloating, a serious side effect. A doctor should be consulted about any of these side effects, says MayoClinic.com.
Pain
Although Apo-Mefenamic was designed to help relieve pain, it also may induce pain as common and serious side effect, MayoClinic.com indicates. For example, the person may experience pain in the side, right or left, or in the back near the buttocks. The medication also may induce pain and cramps in the abdominal area that feel severe. The pain may manifest as a burning sensation as well. If symptoms persist or worsen, it's advisable to consult a physician.
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