When you buythis online you will want to be well aware of the side effects that may occur. You can always talk to your local doctor about these before you order the medication. You may feel tired, have an upset stomach, feel dizzy or even have a headache. While these are common, you will want to call your local doctor if these side effects do not go away. If you have more severe side effects such as breaking out in hives or having difficulties breathing you will want to call your local doctor.