Hi, Welcome to health care magic, Fainting or blurry vision or dizziness or lightheadness while working a condition is known as syncope or a presyncope. It means it follows dizziness,lightheadnes and temporary semi consciousnesses for a while without actual becoming unconscious. Here,I would like to ask you some questions regarding your medical history of 1) previous disease apart from hypertension (for which you are taking these cardiac medications), 2) any recent or past surgery, 3) any past history of head injury (like in accident)or 4) is there any other symptoms like chest pain,palpitations,fatigue, blurring vision etc. We need to rule out causes of syncope from cardiac and non cardiac for which you will require detailed history, thoroughly clinical examination for heart like ECG,blood pressure measurements in different positions like supine,sitting and immediately after standing, echo cardiography of heart. The underlying cause could be vasovagal, orthostatic hypotension or postural tachycardia ,neurogenic syncope or syncope due to anxiety etc. You will have to consult your physician first for thoroughly clinical assessment to detect the underlying cause. Treatment will depend on the underlying cause. Meanwhile you can do this things, 1) Maintain proper hydration and electrolyte balance by taking proper fluid intake throughout the day. 2) Positioning on the grounds immediately whenever there is fainting spells and leg elevation, will cause pooling of blood in the upper part of body mainly in brain. 3) Take anti-emetics like tab.ondasetron 8 mg and tab.cyclopam if there is stomach pain or discomfort. Hope i have explained it in a easy way to understand it. Rgards,