Zyban Side Effects

Serious Side Effects

Some side effects of Zyban, while not as common, are potentially serious and should be reported to your healthcare provider. These include but are not limited to:

Seizures (see Zyban Seizures)
Suicidal thoughts or behavior (see Zyban and Suicide)
Anxiety, agitation, or panic attacks
Hostility or aggressiveness
Engaging in unusual or dangerous activities
Restlessness or an inability to sit still
Extreme elation or feelings of happiness that may switch back and forth with a depressed or sad mood
Other unusual changes in behavior
Hallucinations
A rapid heart rate
Chest palpitations
Difficulty sleeping
Feelings of jitteriness or restlessness
Signs of an allergic reaction, including:
- Unexplained rash
- Hives
- Itching
- Unexplained swelling
- Wheezing
- Difficulty breathing or swallowing.

Rare Zyban Side Effects

Rare Zyban side effects occur in less than 1 percent of people taking the drug. Because these side effects are so uncommon, it is difficult to tell whether they are due to the medication or something else.

Some of these rare side effects include but are not limited to:

Low blood pressure (hypotension)
Migraine headaches
Acne
Weight gain (see Zyban and Weight Gain)
High blood sugar (hyperglycemia) or low blood sugar (hypoglycemia)
Anemia
Leg cramps
Impotence (erectile dysfunction or ED) or a decreased sex drive (see Zyban Sexual Side Effects).