Glucosamine is a proteoglycan synthesis stimulator which relieves osteoarthritis symptoms. It helps in the formation of cartilage (the soft tissue that cushions the joints) and keep the joints lubricated for better movement and flexibility.
 

•  Glucosamine sulfate are often used as natural remedies for osteoarthritis.
• Glucosamine sulfate can help control osteoarthritis by protecting against the breakdown of cartilage. 
• Glucosamine is touted as a natural remedy for interstitial cystitis, temporomandibular joint disorder, and glaucoma.

•  bloating
•  constipation
•  diarrhea
•  gas
•  heartburn
•  indigestion
•  nausea
•  stomach upset

In rare cases, use of glucosamine may cause such side effects as drowsiness, skin
reactions, vomiting, headache, elevated blood pressure and heart rate, and
palpitations.

•  Do not take glucosamine, if you are allergic to glucosamine or shell fish.
•  Avoid taking glucosamine, if you are pregnant or breast feeding.
•  Doctor’s advice should be considered in case of patients with following history of disease conditions: diabetes; high cholesterol or triglycerides; cancer; liver disease; asthma or breathing disorder.
•  Do not continue the glucosamine, if you are having surgery.