How to take Cialis, Levitra and Viagra correctly

Are There Precautions Before Taking One of These Drugs?
There are certain situations in which these drugs may not be safe to take. Before taking them, talk to your doctor:

  • If you are allergic to any drugs, including Viagra or other ED medications.
  • If you are taking prescription or nonprescription medications, including herbal and dietary supplements
  • If you are scheduled for surgery, including dental surgery
  • If you take nitroglycerin or a long-acting nitrate to treat chest pain. The combination of Cialis, Levitra, or Viagra with these drugs can cause dangerously low blood pressure.
  • If you take alpha-blockers for blood pressure or prostate problems. The combination of Cialis, Levitra, or Viagra with these drugs can also cause dangerously low blood pressure.

In addition, always follow the directions on your prescription label carefully and ask your doctor. Take these drugs exactly as directed. Do not take more or less or take it more often than prescribed by your doctor. Do not take these drugs more than once a day.

Who Should Not Take Cialis, Levitra, or Viagra?
If you have suffered from a heart attack, stroke or life threatening arrhythmia (irregular heart rate) within the last 6 months you should find another option with your doctor. It is also advised to not take these drugs if you have uncontrolled high or low blood pressure or if you experience any chest pain with sex.

Are there Side Effects with Cialis, Levitra, and Viagra?
Side effects are not common but they can occur. Side effects can be:

  • Headache
  • Upset stomach or heartburn
  • Flushing (feeling warm)
  • Nasal congestion
  • Changes in vision (color, glare)
  • Back pain (with Cialis)

Call your doctor if you experience severe forms of these symptoms or if they do not go away after 4-8 hours.

Call your doctor or seek emergency treatment immediately if you experience any of the following symptoms:

  • Rash
  • Painful erection
  • Prolonged erection (longer than 4 hours)
  • Fainting
  • Chest pain
  • Itching or burning during urination

Stop taking these medications and call a doctor or health care provider right away if you experience sudden or decreased vision loss in one or both eyes. A rare vision problem called NAION has been reported by a few men using these drugs. NAION (nonarteritic anterior ischemic optic neuropathy) causes a sudden loss of eyesight because blood flow is blocked to the optic nerve. People who have a higher chance for NAION include those who:

  • Are over 50 years old
  • Smoke
  • Have heart disease
  • Have diabetes
  • Have high blood pressure
  • Have high cholesterol
  • Have certain eye problems