I keep yawning constantly im taking 20mg citalopram, what can i do to make it stop.

Take pill at bedtime: About five percent of humans on this medication experience this. They should take the pill at bedtime.

Nasal breathing: There have been a few cases of SSRI antidepressants causing excessive yawning. Talk to your doc about lowering the dose. Here is a 'cool' article on scholarpedia Olivier Walusinsk a French doctor, about it, He writes that nasal breathing or cooling your forehead (cold compresses) may help with yawning and explains the theory. Let is know if it works! http://www.scholarpedia.org/article/Yawn