Along with its needing effects, a drug may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.
Check with your family doctor immediately if any of the following side effects was happen
Signs and symptoms of overdose
Difficulty in breathing; dizziness - extreme or faintness; feeling cold; pinpoint pupils of eyes; slow heartbeat; unusual tiredness or weakness - extreme
Check with your family doctor as soon as possible if any of the following side effects was happen
More common with transdermal system - skin patch only
Itching or redness of skin
Less common
Mental depression; swelling of feet and lower legs
Rare
Paleness or cold feeling in fingertips and toes; vivid dreams or nightmares
More common side effects may occur that usually do not need medical attention. These side effects may go away during treat as your body adjusts to the drug. However, check with your family doctor if any of the following side effects continue or are bothersome:
More common
Constipation; dizziness; drowsiness; dryness of mouth; unusual tiredness or weakness
Less common
Darkening of skin with transdermal system - skin patch only; decreased sexual ability; dizziness, lightheadedness, or fainting, especially when getting up from a lying or sitting position; dry, itching, or burning eyes; loss of appetite; nausea or vomiting; nervousness
After you have been using this drug for a while, it may cause unpleasant or even harmful effects if you stop taking it too suddenly. After you stop taking this drug, check with your family doctor immediately if any of the following was happen
Anxiety or tenseness; chest pain; fast or pounding heartbeat; headache; increased salivation; nausea; nervousness; restlessness; shaking or trembling of hands and fingers; stomach cramps; sweating; trouble in sleeping; vomiting
More common side effects not listed above may also occur in some diseaseds. If you notice any other problems, check with your family doctor.