• Abnormal vaginal bleeding
• Acne (acne vulgaris)
• Actinic keratosis
• Allergies (seasonal and perennial allergic rhinitis)
• Alzheimer's disease
• Amenorrhea
• Anal fissure
• Anaphylactic shock
• Androgenetic alopecia (baldness)
• Andropause
• Anemia
• Aneurysms
• Angina pectoris
• Angular cheilitis
• Ankylosing spondylitis
• Anorexia
• Anxiety
• Aphasia
• Aphthous ulcers (mouth sores)
• Appendicitis