Tiomate 12mcg/18mcg Transcaps is used to treat chronic obstructive pulmonary disorder (a lung disorder in which the flow of air to the lungs is blocked). It helps in relaxing the muscles of the air passages and making it easier to breathe. It relieves coughing, wheezing, and shortness of breath. Your doctor will tell you how often you need to use your Tiomate 12mcg/18mcg Transcaps. The effect of this medicine may be noticeable after a few days, but will only reach its maximum after a few weeks. This medicine must be used regularly to be effective, so go on taking it even if you don't have any symptoms.  If you stop taking it, your COPD may get worse. To get the benefit from this medicine, you need to make sure you get your inhaler technique right, otherwise, it does not work well.The most common side effects of Tiomate 12mcg/18mcg Transcaps are nausea, diarrhea, dry mouth, vomiting, dizziness, nasopharyngitis (inflammation of the throat and nasal passages), and insomnia. If you experience any of these symptoms, don’t stop taking it, but do talk to your doctor. You can prevent some of these symptoms by rinsing your mouth and throat with water or brushing your teeth after using your inhaler. If you experience any other symptoms and you are worried about them, consult your doctor.Before taking this medicine, you should tell your doctor if you are pregnant, planning pregnancy, or breastfeeding.