Some common side effects can include lightheadedness, dizziness, headache, flushing, and nausea. The 2.5mg and 5mg dose are typically taken daily, but the 10mg and 20mg doses are taken on an as-needed basis, with or without food. This tablet can take up to 4 hours to begin working, and the effects can last anywhere between 24 to 72 hours.

Both tadalafil and sildenafil (the generic form of Viagra) are effective treatments for ED; however, some people prefer tadalafil because of its longer duration of action. Make sure to also inform your doctor and/or pharmacist of all other medications (including over-the-counter drugs and supplements) you are taking in order to prevent drug interactions.

You should also speak with your doctor about eating grapefruit or drinking grapefruit juice while taking this tablet since it is possible the fruit will interfere with the medication. Lastly, inform your doctor if you are on nitrates, as they cannot be taken together with this tablet.

This paragraph is only an overview, and it is not intended to replace medical counseling; please consult your pharmacist and/or medical provider for more comprehensive information.