You can feel lightheaded or sleepy after taking this medication. You may become dizzy or tired after consuming alcohol or marijuana (cannabis). Till you can do it safely, avoid operating machinery, driving, or doing anything else that requires alertness. Avoid drinking alcohol. Consult your physician if you use marijuana (cannabis). Inform your surgeon or dentist of all the medicines you use before surgery.The adverse effects of this medication, particularly drowsiness and loss of coordination, may be more noticeable in older persons. The risk of slipping can rise as a result of these side effects.