Are there any authentic reports of severe side-effects of menthol in cough syrups ?

Acai Berry Juice Scam • Weight Watchers Points List • Wellsphere • List of High Protein Foods • List of Low Carb Foods • 5k Equals How Many Miles • Causes of Swollen Ankles • Stage 4 Cancer Survival Rate • Itchy Red Spots • Arm Numbness and Tingling • Symptoms of Vitamin D Deficiency • Pictures of Skin Rashes • Mucus Discharge Pregnancy • Swollen Red Rash • Small Red Itchy Bumps • Itchy Bumps on Legs • Red Spots on Tongue • Swollen Lymph Nodes • Burning After Urination • Bloating After Eating • Rash Around Mouth • Thigh Slimming Exercises • Watery Discharge Pregnancy • List of High Calorie Foods • Tingling Toes and Fingers • Red Purple Spots on Legs • List of Fruits and Vegetables • Pelvic Exam • Heat Rash Pictures • 6 Week Fetus • Non Itchy Rash • Red Spots in Mouth • Leg Ache • Prednisone and Alcohol • Bumps in Throat • Arm Muscle Spasm • Blocked Sweat Glands • How to Lose 10 Pounds • Phlegm Throat • Tingling in Legs • Causes of Swollen Lip • Remedies for Swollen Glands • Remedies for Swollen Ankles • Inflamed Cervix • Numbness in Toes • Causes of Pain • Pain in Upper Thigh • Low Red Blood Cell Count • Causes of Swollen Glands • Causes of Swollen Lymph Nodes • 6 Weeks Pregnant Symptoms • 29 Weeks Pregnant • Metallic Taste in the Mouth • Swollen Parotid Gland • Skeletal System Diseases