Browse Health
Internist, Endocrinologist (diabetes, hormones)
9 years of experience
Accepting new patients
Video profile


Education ?

Medical School Score
Texas Tech University (2003)

Awards & Distinctions ?

Compassionate Doctor Recognition (2015)
American Board of Internal Medicine
American Association of Clinical Endocrinologists

Affiliations ?

Dr. Felton is affiliated with 4 hospitals.

Hospital Affiliations



  • Lubbock Heart Hospital
    4810 N Loop 289, Lubbock, TX 79416
    Top 25%
  • Covenant Medical Center
    3615 19th St, Lubbock, TX 79410
    Top 25%
  • Covenant Children's Hospital
    3610 21st St, Lubbock, TX 79410
  • Covenant Hospital Plainview
    2601 Dimmitt Rd, Plainview, TX 79072
  • Publications & Research

    Dr. Felton has contributed to 3 publications.
    Title Implications of Vitamin D Deficiency in Pregnancy and Lactation.
    Date May 2010
    Journal American Journal of Obstetrics and Gynecology

    Vitamin D is an essential fat soluble vitamin and a key modulator of calcium metabolism in children and adults. Because calcium demands increase in the third trimester of pregnancy, vitamin D status becomes crucial for maternal health, fetal skeletal growth, and optimal maternal and fetal outcomes. Vitamin D deficiency is common in pregnant women (5-50%) and in breastfed infants (10-56%), despite the widespread use of prenatal vitamins, because these are inadequate to maintain normal vitamin D levels (>or=32 ng/mL). Adverse health outcomes such as preeclampsia, low birthweight, neonatal hypocalcemia, poor postnatal growth, bone fragility, and increased incidence of autoimmune diseases have been linked to low vitamin D levels during pregnancy and infancy. Studies are underway to establish the recommended daily doses of vitamin D in pregnant women. This review discusses vitamin D metabolism and the implications of vitamin D deficiency in pregnancy and lactation.

    Title 1,25(oh)2 Vitamin D Inhibits Foam Cell Formation and Suppresses Macrophage Cholesterol Uptake in Patients with Type 2 Diabetes Mellitus.
    Date September 2009
    Journal Circulation

    Cardiovascular disease is the leading cause of death among those with diabetes mellitus. Vitamin D deficiency is associated with an increased risk of cardiovascular disease in this population. To determine the mechanism by which vitamin D deficiency mediates accelerated cardiovascular disease in patients with diabetes mellitus, we investigated the effects of active vitamin D on macrophage cholesterol deposition.

    Title Analysis of Responses to Valerian Root Extract in the Feline Pulmonary Vascular Bed.
    Date May 2004
    Journal Journal of Alternative and Complementary Medicine (new York, N.y.)

    OBJECTIVES: This study was undertaken to investigate pulmonary vascular response to valerian (Valeriana officinalis) in the feline pulmonary vasculature under constant flow conditions. DESIGN: In separate experiments, the effects of NG-L-nitro-L-arginine methyl ester (L-NIO), a nitric oxide synthase inhibitor, glibenclamide, an adenosine triphosphate (ATP)-sensitive potassium (K+) channel blocker, meclofenamate, a nonselective cyclooxygenase (COX) inhibitor, bicuculline, a GABA(A) receptor antagonist, and saclofen, a GABA(B) antagonist, were investigated on pulmonary arterial responses to various agonists in the feline pulmonary vascular bed. These agonists included valerian, muscimol, a GABA(A) agonist, SKF-97541 a GABA(B) agonist, acetylcholine (ACh), and bradykinin, both inducers of nitric oxide synthase, arachidonic acid, a COX substrate, and pinacidil, an ATP-sensitive K+ channel activator, during increased tone conditions induced by the thromboxane A2 mimic, U46619. Settings/location: Laboratory investigation. SUBJECTS: Mongrel cats of either gender. INTERVENTIONS: Injections of the abovementioned agonists and antagonists were given. OUTCOME MEASURES: Baseline pulmonary tone, responses to the agonists, and responses to the agonists after injections of antagonists were all measured via a pulmonary catheter transducer and recorded. RESULTS: Valerian root extract is a potent smooth muscle dilator in the feline pulmonary vascular bed. The vasodilatory effects of valerian root extract were unchanged after the administration of L-NIO, glibenclamide, and meclofenamate. These effects were ablated, however, by both saclofen and bicuculline. The ability of saclofen and bicuculline to modulate the dilatory effects of valerian root extract was not statistically different. CONCLUSIONS: The vasodilatory effects of valerian root extract are mediated by a nonselective GABA mechanism.

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