Cialis (tadalafil) is a prescription, oral medication, which is used for the treatment of erectile dysfunction and the symptoms of benign prostatic hyperplasia. It's an extremely effective medication and has quickly risen in popularity as the treatment of choice for sufferers of erectile dysfunction. There are two forms – the standard Cialis, which can be active for up to 36 hours in the body and Cialis Daily, which can be used on a day-to-day basis for more consistent treatment.

As with any medication, while the benefits outweigh the risks, certain side effects can be experienced. It is important to understand what these are, whether you are at a high-risk of experiencing these and how to deal with side-effects if they do occur. The following lists are not exhaustive but cover the majority of side effects and risk factors. For more information, speak to your doctor, or complete our free online consultation.

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Possible side effects

As a prescription medication, there is a small chance that side effects may occur when using it. Depending on which type of Cialis is taken, the chance of side effects is usually much less. The Cialis once a day 2.5mg or 5mg dosage has a very low risk of side effects, due to the low daily dosage, even the standard Cialis 10mg or 20mg tablets (used once every 36-48 hours) have a lower side effect risk compared to popular erectile dysfunction treatments such as Viagra. Below is a list of possible side effects.

Common side effects (about 1 in 10):
Dizziness Stomach pain
Stuffy nose Indigestion
Uncommon side effects (1 in 100 or 1,000)
Stuffy nose, cough or throat irritation Sinus, throat or nose infection
Dehydration or vomiting Pain in arms or legs
Temporary flushing of the face or neck Excessive sweating
Rare side effects (1 in 1000 or 10,000)
An erection that lasts longer than four hours (priapism) A sudden decrease or loss of vision or hearing
A sudden increase or decrease in blood pressure Rapid heartbeat or chest pain
Facial swelling, difficulty breathing or swallowing Temporary loss of memory
Itchiness or rashes Drowsiness or extreme lethargy
Tingling or numbness in the face, hands or feet Vomiting, acid reflux or severe nausea

How to prevent the risk of side effects?

Before taking Cialis, it is important to disclose all relevant information to ensure that you are suitable to take Cialis and reduce the risk of side effects. This includes disclosing any allergies, other medications and underlying medical conditions.

Disclose any allergies:

Allergic reactions to Cialis (tadalafil) are unusual, but you should tell your doctor if you have experienced any allergies to it or other medications. While other allergies may seem unrelated, the product may contain some inactive ingredients that could cause an allergic reaction.

Disclose other medications:

Before taking Cialis, you should advise your doctor of any other medication you are taking. When you combine different drugs, they can interact in a way that changes how the medication works and can cause dangerous side effects.

Cialis can cause a dangerous drop in your blood pressure if it's combined with Nitrates, such as nitroglycerin or isosorbide used to treat chest pain and angina. It can also cause a dangerous drop if combined with alpha blocker medications, such as doxazosin or tamsulosin used to treat enlarged prostate and high blood pressure.

Some other medications can affect the way Cialis is removed and broken down by your body, such as:

  • Azole antifungals
  • Macrolide antibiotics
  • HIV and Hepatitis C Virus protease inhibitors
  • Rifampin

Disclose any underlying medical conditions:

Cialis is not suitable for everyone and certain medical conditions may place you at a greater risk of adverse side-effects. It's important to discuss your full medical history with your doctor. In particular, you need to let them know if you:

  • Have suffered from any heart problems including heart attack, chest pain, angina or irregular heartbeat
  • Have suffered from a stroke
  • Have kidney or liver disease
  • Have high or low blood pressure
  • Have had painful or prolonged erections in the past, or have penis conditions such as angulation, scarring or Peyronie's disease
  • Have leukaemia, sickle cell anaemia or multiple myeloma
  • Have eye problems such as retinitis pigmentosa or sudden vision loss
  • Have stomach ulcers or bleeding disorders

Things to avoid when taking Cialis:

Finally, in addition to the above precautions, it is important to avoid the following while taking Cialis:

  • Other erectile dysfunction medications
  • Recreational drugs, in particular, drugs such as poppers
  • Excessive alcohol, which may increase your risk of experiencing side-effects.

Dealing with Cialis side effects

The mild common side effects should pass relatively quickly, within one to two hours. For men who experience muscle or back pain, it usually occurs within 12-24 hours after taking Cialis (tadalafil) and disappears within two days. If they persist or worsen, tell your doctor immediately.

If you experience any symptoms of some of the rarer and more severe side-effects, it's important to stop taking Cialis (tadalafil) and get medical help straight away. In particular, you must seek emergency medical help if you show any signs of:

  • Heart problems/attack
  • Prolonged erection
  • Sudden hearing or vision loss
  • Allergic reaction to the medication

How can I find out if Cialis is right for me?

If you suffer from erectile dysfunction and want to know if this treatment could be the right one, you can read more about Cialis here.

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