Montelukast
"I have been suffering from asthma since the age of 7 and I was recently prescribed montelukast sodium after a bad chest infection which had me hospitalised. I have taken it previously about two years back as well. However since I began taking it this time I noticed I can't fall asleep, I'm badly constipated and extremely lethargic, depressed, irritable and get angered really quick. No medicine is worth feeling this way and I'm stopping this immediately. If a simple drug manifests such tangible changes in your body, imagine what it does to your body silently."