Asert D Tablet ER is a combination medicine. It is prescribed to treat various types of bacterial infections. It fights against the microorganisms to prevent their growth and further spread of the infection. Asert D Tablet ER is a prescription medicine. It is advised to take it as per the prescription. It can be taken with or without food, but it must be taken at a fixed time to ensure better efficacy. Do not consume more than the recommended dose, as this may have harmful effects on your body. If you miss a dose, take it as soon as you remember. The course of the treatment must be completed even if you feel better. Sudden discontinuation of the treatment may affect the potency of the medicine. Some common side effects of this medicine are nausea, vomiting, diarrhea, indigestion, etc. If any of the side effects get aggravated, you must consult your doctor immediately. If you experience any allergic reaction (rashes, itching, swelling, shortness of breath, etc.), you must seek immediate medical help.