More common side effects may include:
Constipation, decreased appetite, decreased sex drive, diarrhea, dizziness, dry mouth, ejaculation disorder, fatigue, flu-like symptoms, impotence, indigestion, insomnia, nausea, runny nose, sinusitis, sleepiness, sweating

Less common side effects may include:
Abdominal pain, abnormal dreaming, allergic reactions, blurred vision, bronchitis, chest pain, coughing, earache, fever, gas, heartburn, high blood pressure, hot flushes, increased appetite, irritability, joint pain, lack of concentration, lack of energy, lack of orgasm, light-headedness, menstrual cramps, migraine, muscle pain, nasal congestion, neck and shoulder pain, pain in arms or legs, palpitations, rash, ringing in the ears, sinus congestion, sinus headache, stomachache, tingling, toothache, tremors, urinary problems, vertigo, vomiting, weight changes, yawning

Wait, I'm gonna yawn all the time? Well, I suppose the uptick is that I won't be so self-conscious about it.