Cialis (Tadalafil) – Uses, Benefits, Side Effects, Safety & Medication Guide

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Cialis is the brand name for tadalafil, a prescription medication belonging to the phosphodiesterase type 5 (PDE5) inhibitor class. Cialis is approved for the treatment of erectile dysfunction (ED), the signs and symptoms of benign prostatic hyperplasia (BPH), and the combination of ED and BPH in adult men.

Tadalafil works by increasing blood flow to the penis during sexual stimulation, which can help a man achieve and maintain an erection. It does not directly increase sexual desire and does not protect against pregnancy or sexually transmitted infections.

Cialis may also be taken as a once-daily treatment in certain situations, while other patients may use it as needed for erectile dysfunction. The appropriate regimen depends on the individual's medical condition, response to treatment, and other medications.

For medication-category information, readers can review the Cialis medication category.

Because tadalafil can interact with nitrates, riociguat, alpha-blockers, blood-pressure medicines, and certain other drugs, it should be used only according to the instructions of a qualified healthcare professional.

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What Is Cialis (Tadalafil)?

Cialis contains tadalafil, an active ingredient belonging to the PDE5 inhibitor class.

PDE5 inhibitors work by affecting the signaling pathway involved in smooth-muscle relaxation and blood flow. In erectile dysfunction, tadalafil helps increase blood flow to the penis when sexual stimulation occurs.

Cialis is different from medications used for other medical conditions, even though tadalafil is also marketed under other brand names for pulmonary arterial hypertension. Patients should use only the tadalafil product and formulation prescribed for their condition.

For readers comparing other PDE5 inhibitor medications, educational information is also available through the Viagra medication category and Levitra medication category.

These medications contain different active ingredients and should not be combined or substituted without medical guidance.

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Cialis Uses

Healthcare professionals may prescribe Cialis for:

• Erectile dysfunction (ED)

• Benign prostatic hyperplasia (BPH)

• ED and BPH together

The current Cialis prescribing information specifically lists these three indications.

Erectile Dysfunction

ED is difficulty getting or maintaining an erection firm enough for sexual activity.

Tadalafil works by increasing blood flow to the penis during sexual stimulation. It does not automatically produce an erection and does not increase sexual desire.

Persistent ED can sometimes be associated with underlying health conditions, including cardiovascular disease, diabetes, or vascular problems. MedlinePlus notes that ED can sometimes be a sign of other health problems, so persistent symptoms should be discussed with a healthcare professional.

Benign Prostatic Hyperplasia

BPH is an enlargement of the prostate that can cause urinary symptoms such as:

• Frequent urination

• Urinary urgency

• Difficulty starting urination

• Weak or interrupted urine stream

• Dribbling

• Incomplete bladder emptying

Tadalafil is approved to treat the signs and symptoms associated with BPH.

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Potential Benefits of Cialis

When appropriately prescribed, tadalafil may help:

• Improve erectile function

• Support the ability to achieve and maintain an erection during sexual stimulation

• Provide an extended window of erectile-function improvement compared with some shorter-acting ED medicines

• Reduce certain urinary symptoms associated with BPH

• Address ED and BPH simultaneously when both conditions are present

The benefits vary between individuals and depend on the underlying condition, medical history, and treatment regimen.

Cialis should not be considered a treatment for sexual desire itself. Its effect on erections depends on sexual stimulation.

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How Does Cialis Work?

Tadalafil inhibits the PDE5 enzyme.

During sexual stimulation, nitric-oxide signaling contributes to the production of cyclic guanosine monophosphate (cGMP), which helps relax smooth muscle and increase blood flow.

By inhibiting PDE5, tadalafil helps maintain cGMP activity and can support increased blood flow to the penis during sexual stimulation.

This explains why Cialis does not simply cause an automatic erection after it is taken.

For BPH, tadalafil's effects on smooth muscle and blood flow can help relieve certain lower urinary tract symptoms.

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Available Cialis Strengths

Cialis tablets are available in several strengths.

Current U.S. Cialis labeling lists:

• 5 mg

• 10 mg

• 20 mg

The prescribing information also describes different dosing regimens depending on whether Cialis is being used as needed for ED or once daily for ED, BPH, or both conditions.

The availability of a particular strength does not mean that it is appropriate for every patient.

Patients should use the strength and schedule prescribed by their healthcare professional.

For medication-category navigation, readers can also review the PrimeFitt Cialis category.

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Cialis Dosage Information

Cialis dosing depends on the condition being treated and the individual's response and medical profile.

As-Needed Use for Erectile Dysfunction

Current Cialis labeling lists 10 mg as the usual starting dose for as-needed treatment of ED. Depending on efficacy and tolerability, the dose may be adjusted to 5 mg or 20 mg. The maximum recommended frequency is once per day for most patients.

Once-Daily Use for Erectile Dysfunction

For once-daily treatment of ED, the labeled starting dose is 2.5 mg daily, which may be increased to 5 mg based on response and tolerability.

Once-Daily Use for BPH

For BPH, the recommended once-daily Cialis dose in the current labeling is 5 mg, generally taken at approximately the same time each day.

These are prescribing-information examples and not individualized dosing recommendations.

Kidney function, liver function, age, other medicines, and overall cardiovascular health may affect treatment decisions.

Never increase, decrease, or repeat a dose without medical advice.

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How to Take Cialis

Tadalafil tablets can generally be taken with or without food.

For as-needed ED treatment, tadalafil is generally taken before anticipated sexual activity. MedlinePlus states that it is usually taken at least 30 minutes before sexual activity and should not be taken more than once every 24 hours unless directed otherwise.

For once-daily treatment, patients should take tadalafil at approximately the same time each day.

Follow the prescription label carefully rather than using a dosing schedule based on another person's treatment.

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How Long Does Cialis Last?

Tadalafil is known for having a relatively long duration of action.

Current Cialis labeling states that as-needed treatment can improve erectile function compared with placebo for up to 36 hours after dosing.

This does not mean that an erection lasts for 36 hours.

Instead, it refers to the period during which the medication may continue to support erectile function when sexual stimulation occurs.

An erection lasting longer than four hours is a medical emergency and requires immediate medical attention.

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Common Cialis Side Effects

Possible side effects include:

• Headache

• Indigestion or heartburn

• Flushing

• Back pain

• Muscle aches

• Nasal symptoms

• Dizziness

• Nausea

• Diarrhea

MedlinePlus lists headache, indigestion, nausea, diarrhea, flushing, and various muscle or body pains among possible side effects.

Many side effects are mild, but patients should contact their healthcare professional if symptoms are severe, persistent, or concerning.

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Serious Cialis Side Effects

Seek urgent medical attention for symptoms such as:

• Chest pain

• Severe dizziness or fainting