Keflex side effects: Keflex is a cephalosporin antibiotic. This antibiotic can commonly cause gastrointestinal side effects like diarrhea, nausea, vomiting and sometimes, headaches. Serious side effects include anaphylactic reactions, decrease in blood cells and liver disease. ...Read more.
1 Vitamin E is an antioxidant for cardiovascular health, a blood thinner, improves circulation and is also an anti-inflammatory. 2  CoQ10 is an important nutrient for the circulation, especially if you suffer from high cholesterol or high blood pressure.
Data on taking vitamin C for hypertension are also mixed. Taking vitamin C with antihypertensive medications may slightly decrease systolic blood pressure, but not diastolic pressure. Supplemental vitamin C -- 500 mg per day taken without antihypertensives -- doesn't seem to reduce systolic or diastolic blood pressure. Type 2 diabetics who supplemented with vitamin C and remained on their antihypertensive medications seemed to have a reduction in blood pressure and arterial stiffness.