Cancer of the throat or larynx

How cancer spreads

Watch this video to see how cancer spreads (metastasizes).

• Cancer

Allergy tests

What happens in an allergy test? Watch this video and find out.

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

Zoloft (sertraline): A Review of Important Precautions and Side Effects

Tips for patients and their caregivers on how to safely use sertraline, and an overview of common side effects

• Zoloft

Trintellix: Uses, How it Works & Common Side Effects

Trintellix is an antidepressant medicine used to treat major depressive disorder in adults, to help improve symptoms. It is a prescription medicine that is thought to work by balancing neurotransmitters which are chemical messengers in the brain.

• Trintellix