Tadalafil can be taken orally 30 minutes before having sex. But it is better to take these medicines as per the instructions of the doctor cause it has a strength of 800 mg, which is very powerful.

There are some drugs that should not interact with tadalafil, such as Nitrates, Nitroglycerin, Azole Antifungals, Blood pressure medications, Boceprevir, Isosorbide Dinitrate, etc. Even tadalafil should not be consumed with grapefruit cause it reduces its effectiveness.

• Headache
• Dizziness
• Fainting
• Sweating
• Vomiting
• Pain or discomfort in the arms

• Do not use grapefruit or drink its juice while using this medicine.
• Take it under the guidance of a professional.
• Do not consume alcohol while taking 
• Tell your doctor if you have any health problems before using it.

There are some studies that say that discontinuing drugs like tadalafil does not cause physical dependence or withdrawal. Still, there are some changes that can be seen in behavior.

Taking too much tadalafil to improve sexual performance can have some chances of getting side effects. 

Store the medicine in a closed container at room temperature, away from heat, moisture, and direct light. Keep it away from minors.

Tadalafil (Cialis) helps to treat erectile dysfunction and impotence in men. Do not break or split Tadalafil medicine. Take the medicine at the same time each day with or without food.

You can take Tadalafil 30 mins before sexual activity, or you can also take a low-dose pill every day. It may take as long as 2 hours to take effect.

You should avoid grapefruit juice and junk foods, which may increase the side effects of Tadalafil. And limit the use of alcohol and smoking while treated with tadalafil.