Symptoms caused by Aspartame

Those reactions included:

Abdominal Pain
Anxiety attacks
arthritis
asthma
Asthmatic Reactions
Bloating, Edema (Fluid Retention)
Blood Sugar Control Problems (Hypoglycemia or Hyperglycemia)
Brain Cancer (Pre-approval studies in animals)
Breathing difficulties
burning eyes or throat
Burning Urination
can't think straight
Chest Pains
chronic cough
Chronic Fatigue
Confusion
Death
Depression
Diarrhea
Dizziness
Excessive Thirst or Hunger
fatigue
feel unreal
flushing of face
Hair Loss (Baldness) or Thinning of Hair
Headaches/Migraines dizziness
Hearing Loss
Heart palpitations
Hives (Urticaria)
Hypertension (High Blood Pressure)
Impotency and Sexual Problems
inability to concentrate
Infection Susceptibility
Insomnia
Irritability
Itching
Joint Pains
laryngitis
"like thinking in a fog"
Marked Personality Changes
Memory loss
Menstrual Problems or Changes
Migraines and Severe Headaches (Trigger or Cause From Chronic Intake)
Muscle spasms
Nausea or Vomiting
Numbness or Tingling of Extremities
Other Allergic-Like Reactions
Panic Attacks
Phobias
poor memory
Rapid Heart Beat
Rashes
Seizures and Convulsions
Slurring of Speech
Swallowing Pain
Tachycardia
Tremors
Tinnitus
Vertigo
Vision Loss
Weight gain
Aspartame Disease Mimics Symptoms or Worsens the Following Diseases

Alzheimer's Disease
Arthritis
Birth Defects
Chronic Fatigue Syndrome
Diabetes and Diabetic Complications
Epilepsy
Fibromyalgia
Lupus
Lyme Disease
Lymphoma
Multiple Chemical Sensitivities (MCS)
Multiple Sclerosis (MS)
Parkinson's Disease
How it happens:

See the link for a good explanation of the problems from aspartame