If you have just started running, have patience as it takes time to build stamina. No medicine can magically improve stamina overnight without some serious side effects. This is what you can do 1. Get you hemoglobin checked. Make sure you are not anaemic. If you are, take iron supplements 2. Always do warm up and stretching exercises before you begin a run 3. Keep yourself hydrated and drink electrolyte drinks like coconut water or shikanji 4. Have a carbohydrate rich snack before you exercise to give energy to body before work out. Examples would be sandwich, poha, oats etc 5. Increase protein in your diet. As you exercise and gradually build your muscles, your body will need proteins. You can have eggs, Dal, soya etc.

Please Do breathing exercises daily Yoga and pranayam will help you a lot Take salads and fruits more Take milk regularly Take dates beet root jaggery green leafy vegetables regularly Take Tab geriforte by Himalaya 1 Twice a day for 3 months Lohasav 10 ml Twice a day for 3 months Tab zentel 1 stat Reconsult after 45 days