Letitia Griffin MSN, APRN, FNP-BC

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Date Published: 07/20/2026

Letitia Griffin MSN, APRN, FNP-BC

Letitia Griffin MSN, APRN, FNP-BC is an Investigator and Nurse Practitioner at our Orlando Main Clinic and embedded Family Practice Clinic. “Ms. Letitia”, as she is known to the patients, joined CNS in 2010 in the role of Prescreener, Manager of Client Services, and Sub-Investigator. With 33 years of nursing experience and expertise she is invaluable to the operations of every trial. Letitia has conducted over 300 Pediatric, Adolescent, Adult and Geriatric Ph I – IV trials including Addiction, Dermatology, Vaccine, Pain, Psychiatry, Orthopedics, Women’s Health, Sleep, Neurology, GI, Cardiovascular, Diabetes and Obesity with Pediatric,
Adolescent, Adult and Geriatric patients. With her dedication, she has helped bring 108 new drugs to market.

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Alcohol Addiction
Alzheimer's Disease
Anxiety
Asthma
Atherosclerotic Cardiovascular Disease (ASCVD)/Coronary Artery Disease (CAD)
Atopic Dermatitis
Atrial Fibrillation
Attention-Deficit/Hyperactivity Disorder (ADHD)
Axial Spondyloarthritis
Back Pain
Binge Eating Disorder
Bipolar Disorder
Birth Control
C-Diff Vaccine
Cannabis Withdrawal
Chronic Kidney Failure/Disease
Chronic Obstructive Pulmonary Disease (COPD)
Chronic Pain
Congestive Heart Failure
Constipation
Contact Dermatitis
COVID-19 Infection
Dementia
Depression
Diabetic Foot Ulcer
Diabetic Neuropathy
Dyskinesia
Dystonia
Eczema
Erectile Dysfunction (ED)
Epilepsy
Essential Tremor (ET)
Fibromyalgia
General Anxiety Disorder
Gout
Healthy Volunteer
Heart Failure
Hepatic Impairment
Hidradenitis suppurativa (HS)
High Blood Pressure/ Hypertension
High Cholesterol/ Hypercholesterolemia/Hyperlipidemoia
High Triglycerides/ Hypertriglyceridemia
Hot Flashes
Human metapneumovirus (HMPV)
Hypogonadism/Low-T/Low Testosterone
Hypothyroid
Influenza
Kidney Disease
Liver Cirrhosis
Liver Failure
LSD & Psilocybin
Metabolic Dysfunction-Associated Steatohepatisis (MASH)
Memory Loss
Menstrual Migraine
Menopause
Migraine
Multiple Sclerosis
Multiple System Atrophy (MSA)
Nonalcoholic Fatty Liver Disease (NFLD)
Nonalcoholic Steatohepatitis (NASH)
Norovirus Infection
Opioid Addiction
Osteoarthritis
Pain Post-Chemo
Parkinson's Disease
Pediatric ADHD
Pediatric Obesity
Pediatric Vaccine
Polycystic Ovary Syndrome (PCOS)
Post Traumatic Stress Disorder (PTSD)
Pre-Alzheimer's
Psoriasis
Psoriatic Arthritis
Respiratory Syncytial Virus (RSV)
Schizophrenia
Seizure
Social Anxiety Disorder
Smoking Cessation
Type 1 Diabetes
Type 2 Diabetes
Ulcerative Colitis
Vaccines
Vaccine- C.DIFF
Vaccine- COVID
Vaccine- Flu
Vaccine- Pneumonia
Vaccine- RSV
Vaccine- RSV/HMPV
Weight loss for Obesity

Acne
Alzheimer's Disease
Amenorrhea
Anemia
Anxiety
Asthma
Atherosclerotic Cardiovascular Disease (ASCVD)/Coronary Artery Disease (CAD)
Athlete's Foot
Atopic Dermatitis
Atrial Fibrillation
Attention Disorder Disorder/ADD/ADHS
Autism
Back Pain
Binge Eating Disorder
Birth Control
Bladder Pain
Botulism
Bronchopulmonary Sequestration (BPS)
C. Difficile Infection
Cancer, Breast
Cancer, Gastrointestinal
Cancer, Genitourinary (GU)
Cancer, Gynecologic (Gyn)
Cancer, Head and Neck
Cancer, Lymphatic System (Lymphoma)
Cancer, Prostate
Cancer, Skin
Cancer, Thoracic/Lung
Cancers, Blood
Cardiac Arrhythmias
Cholera
Chronic Kidney Failure/Disease
Chronic Obstructive Pulmonary Disease (COPD)
Chronic Pain
Cluster Headaches
Cold Sores
Common Cold
Congestive Heart Failure
Constipation
Contact Dermatitis
COVID-19 Infection
Crohn's Disease
Dementia, General
Depression
Diabetes
Diabetic Gastroparesis
Diabetic Nephropathy
Diabetic Neuropathy
Diastolic Dysfunction and Diastolic Heart Failure
Drug Allergies
Dry Eyes
Dyskinesia
Eczema
Endometriosis
Erectile Dysfunction (ED)
Essential Tremor (ET)
Fibromyalgia
Food Allergies
Gastroesophageal Reflux Disease (GERD)
Gastroparesis
Gout
H. Pylori
Healthy Volunteer
Heart Failure
Hemorrhoids
Hepatic Impairment
Hepatic Steatosis
Hepatitis B
Hepatitis C
Hidradenitis suppurativa (HS)
High Blood Pressure/Hypertension
High Cholesterol/Hypercholesterolemia/Hyperlipidemoia
High Triglycerides/Hypertriglyceridemia
HIV/AIDS
Hives
Hot Flashes
Human metapneumovirus (HMPV)
Human Papillomavirus (HPV)
Hyperuricemia
Hypogonadism/Low-T/Low Testosterone
Idiopathic Pulmonary Fibrosis (IPF)
Impaired immune system
Influenza
Intersititial Cystitus
Irritable Bowe Syndrome with Constipation (IBS-C)
Irritable Bowl Syndrome with Diarrhea (IBS-D)
Kidney Disease
Lactose Intolerance
Liver Failure
Long COVID
Lupus
Memory Loss
Meningitis
Metabolic Syndrome
Migraine
Mild Cognitive Impairment
Multiple Sclerosis
Muscle Spasms
Myelodysplastic Syndrome (MDS)
Nocturia
Nonalcoholic Fatty Liver Disease (NFLD)
Nonalcoholic Steatohepatitis (NASH)/Metabolic Dysfunction-Associated Steatohepatisis (MASH)
Norovirus Infection
Opioid Addiction
Opioid-Induced Constipation (OIC)
Osteoarthritis, General
Osteoarthritis, Hip
Osteoarthritis, Knee
Osteoporosis
Otitis Media
Overactive Bladder (OAB)
Paleo Diet
Parkinson's Disease
Pediatric Issues
Pediatric Migraine
Pediatric Vaccine
Peripheral Artery Disease (PAD)
Pneumonia
Polycystic Ovary Syndrome (PCOS)
Post Traumatic Stress Disorder (PTSD)
Postherpetic Neuralgia
Post-Operative Pain
Pre-Alzheimer's
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Premature Ejaculation (PE)
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Psoriatic Arthritis
Pulmonary Hypertension
Respiratory Syncytial Virus (RSV)
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Sleep Problems
Smoking Cessation
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Soft Tissue Injuries
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Tension Headache
Ulcerative Colitis
Urinary Tract Infection (UTI)
Urticaria
Vaccines
Weight loss for Obesity
Women's Health