Hand transplant

How to choose a fitness ball

A fitness ball is versatile, but it's not one-size-fits-all. See your options.

Tramadol: Precautions and Common Side Effects

Safety precautions, side effects and discontinuation recommendations for tramadol. Learn more about tramadol at: http://www.drugs.com/tramadol.html

• Tramadol
• Pain

Macular degeneration

This animation shows the process of macular degeneration in the eye. The macula is the part of the retina that distinguishes fine details at the center of the field of vision. Macular degeneration results from a partial breakdown of the insulating layer between the retina and the choroid layer of blood vessels behind the retina. Macular degeneration results in the loss of central vision only.

• Vision

Knee extension with weight machine

The knee extension exercise targets the front of the thigh. See how it's done.

Ibuprofen: Pain Mechanism, Dose Safety and Drug Interactions

A brief discussion of mechanism of action, maximum doses and drug interactions for ibuprofen

• Ibuprofen