The seasonal flu shot is a yearly vaccine administered to protect against the flu, or influenza. Here are the facts and side effects of the shot.

Common mood stabilizer side effects include headaches, tremors, and nausea. More serious side effects include changes in vision and loss of balance.

Allergy medicine comes in three main varieties: antihistamines, decongestants, and corticosteroid nasal sprays. Here's which medication works best.