I'm glad this website is running this information because I realized today that after taking 1500 mg over the last 3 days I'm not going nuts or am having an adverse reaction to the cough medicine prescribed to me as I completely stopped taking it.
My symptoms are: Increased heart rate-fluxuating, skin crawling/itching, tingling feeling throughout my body, horrible menthol-like taste in my mouth, and strangely an increased libido.
Trust me when I say that the increased libido isn't worth all of the other horrible reactions to this medication. I initially took it for severe cough and flu-like symptoms. I also suffer from severe NES, and degenerative disc disease. No doubt I will be stopping this regiment.