It is important that you are aware of the side effects before you purchase Prevacid. If you start experiencing an allergic reaction due to lansoprazole then you should report to your doctor. Some of effects that may arise on account of an allergic reaction include hives or swelling of lips and face.

Some of the side effects of Prevacid include:

• uneven heart rate
• jerking muscle movements
• dizziness
• confusion
• sleepiness
• muscle cramps
• weakness
• cough
• headache
• constipation

However, as side effects may vary, there are other side effects which may arise. You should report to your doctor if you purchase Prevacid and experience any negative reactions.