Colin Chalk MD CM FRCPC


Headaches: Should I Take Medicine to Prevent Migraines?

Guides you through the decision to take drugs for migraines. Covers treatment with antidepressants, anticonvulsants, beta-blockers, and calcium channel blockers. Lists side effects. Includes interactive tool to help you make your decision.

Stroke: Changes in Emotions

Emotional reactions after a stroke may be different from normal emotional reactions. The reaction may have little or no clear connection with what is happening around the person. Often reactions can be easily interrupted by diverting the person’s attention. People who have had a stroke—usually in the front part of the…

Multiple Sclerosis: Should I Start Taking Medicines for MS?

Guides you through decision to take medicines to treat MS (called disease-modifying therapy). Covers medicine choices. Covers side effects. Lists reasons for and against taking medicines. Includes interactive tool to help you make your decision.

Pseudobulbar Affect (PBA)

What is PBA? Pseudobulbar affect (PBA) is a problem in the brain that causes you to laugh or cry for no reason. When you have PBA, sudden fits of tears or laughter can come from nowhere. This behavior usually has nothing to do with what you’re doing or feeling. And it’s something you can’t control. PBA tends to cause…