Both verapamil and hydralazine can cause headache and stomach upset. Headache is also caused by uncontrolled high blood pressure. The first line of treatment for hypertension is lifestyle changes, including dietary changes, physical exercise, and weight loss. Several classes of medications, collectively referred to as antihypertensive medications, are available for treating hypertension. Advice 1. Consult your doctor for change of medicine or dose modification 2. Start workout like walking, jogging, cycling, or swimming 3. Take diet rich in whole grains, fruits, and vegetables 4. Avoid oily and high cholesterol foods such as egg yolk and milk products etc 5. Consume less salt 6. Avoid smoking, alcohol, coffee and caffeinated beverages 7. Lose extra weight if you are overweight 8. Reduce your metal stress because stress activates sympathetic system and increases BP 9. Measure your BP regularly Thanks