How does Levitra work?

Levitra inhibits the production of phosphodiesterase type 5 (PDE5) which may slow or stop the formation of an erection. Levitra simply allows the body to go through its natural cycle of increasing the flow of blood into the penis to produce an erection.

What to tell your doctor

Before choosing to buy Levitra, ask your doctor to ensure that it will not interact adversely with any of the other drugs, health supplements and herbal remedies you already take. In particular, never give in to the temptation to take Levitra at the same time as Viagra or Cialis. This can be a dangerous overdose.

Because the sexual activity is exercise, a full health check-up is a good idea if you have a sedentary lifestyle. Otherwise, there is a risk that you will overexert yourself. The older you are, the greater the need to seek advice before taking Levitra.

Next, tell your doctor if:

  • an erection was painful or lasted an unnaturally long time;
  • your penis has changed shape; or
  • your testicles are swollen or sore.

The cause should be established before you take a drug designed to produce a harder erection over a longer period of time.

Finally, Levitra does not have magic properties. If you have sexual intercourse without a condom, you may:

  • contract one of the sexually transmitted diseases (STDs);
  • pass your existing STD on to your partner; or
  • find yourself a father unless your partner is taking independent contraceptive precautions.

Before taking Levitra

Before deciding to buy Levitra, ask your doctor about the risks if you have:

  • any cardiovascular disease;
  • one of the blood cell disorders;
  • liver or kidney disease requiring you to be on dialysis; or
  • night blindness, tunnel vision or other genetic eye problems.

Do not combine Levitra with any drug, whether medicinal or recreational, that contains nitrate. Similarly, do not mix Levitra with the macrolide antibiotics, alpha-blockers, the drugs used to treat arrhythmia and any combination of the drugs used to treat HIV infection. This is not a complete list of contraindicated drugs.


Levitra is supplied in tablet form as 2.5mg, 5mg, 10mg and 20mg doses, which should be taken between 25 and 60 minutes before you anticipate sexual activity. The usual safe starting dose is 10mg, taken as and when required, and not more than once per day. Do not crush or chew the tablets, but swallow them whole with plenty of water. If you take a pill after eating a big meal, it will take longer for Levitra to be absorbed into your bloodstream.

Should you forget to take a dose, never double the next dose to “catch up”. It can be dangerous to exceed the daily dose. For storage, keep the tablets at room temperature in an airtight container, avoid excess heat and moisture, and keep them out of the reach of children.