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Sildenafil  is common in the treatment of ED. It can also treat conditions such as pulmonary hypertension — a type of high blood pressure in the lungs.

The pills come in doses of 25 mg, 50 mg, or 100 mg.

Some advantages of taking sildenafil for ED include:

  • Fast-acting: It starts working around 30 minutes after taking the pill.
  • Research: Clinical trials and studies confirm its effectiveness.
  • Lasting effects: The effects can last for up to 4 hours.
  • Side effects: Serious side effects are rare, though they can include allergic reactions and heart problems.

Some disadvantages include:

Short-term use: It may only be a short-term option, as 20–50% of people who take sildenafil like to buy cenforce 150 and fildena 100 online do so temporarily.

Unsuitable for some health conditions: According to an older review from 2012, it may not suit individuals with some chronic conditions, such as multiple sclerosis.

Drug interactions: It can interact with other drugs, including some heart disease and blood pressure medications.

Preference: People seem to prefer an alternative drug — tadalafil— though the two drugs are equally effective, according to 2017 research.

There are also some possible side effects of sildenafil, including:

  • a stuffy or runny nose
  • hot flashes
  • headaches
  • a fever
  • nausea
  • chest pains
  • painful erections lasting several hours
  • dizziness
  • vision problems
  • indigestion