Macgel is a medication that is used to treat stomach ulcers. It is able to neutralize stomach acidity thanks to its content which is Magnesium Hydroxide. This medication also can be used for other conditions such as peptic ulcers, duodenal ulcers, hyperacidity, gastritis, flatulence and others. Just like every other medication, this medication has a list of side effects along with its usage such as nausea, vomiting, diarrhea, stomachache, soft stool, anorexia, gastralgia and many more. If any of these would to occur to you, please seek medical attention immediately. This medication is to be taken strictly under a doctor’s advice and is to be kept away from children. Always adhere to the dosage instruction given by the doctor to avoid any overdose or other unwanted effects. Also do not pass on this medication to those who you think have the same symptom. It is best to use it only after consulting a doctor.