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What Is Cialis?

What Is Cialis?

Cialis is a prescription medicine used mainly to treat ED (erectile dysfunction) and benign prostatic hyperplasia (BPH). Its generic name is tadalafil, and it belongs to a group of drugs called Phosphodiesterase type 5 (PDE5) inhibitors. Cialis can be taken either as needed before sexual activity or daily in a low dose, and its effects can last up to 36 hours.

Quick Facts About Cialis

Quick Facts About Cialis

Here is a quick summary of key Cialis information:

Brand NameCialis
Generic NameTadalafil
Drug ClassPhosphodiesterase type 5 (PDE5) inhibitor
FDA Approval StatusFDA-approved for ED (erectile dysfunction), symptoms of BPH (benign prostatic hyperplasia), and the combination of ED and BPH
Available FormOral tablets
Strengths2.5 mg, 5 mg, 10 mg, 20 mg
Routes of AdministrationOral (by mouth)
Dosing FrequencyAs needed (once daily max) or once daily (low dose)
Cialis ContraindicationsUse with nitrates, severe heart disease, recent heart attack or stroke, severe liver impairment, hypersensitivity to tadalafil
Elimination Half-Life17.5 hours
Cialis StorageStore at room temperature (20°C-25°C)
Legal StatusPrescription-only medication
Manufacturer (U.S.)Eli Lilly and Company

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What Is Cialis Used For?

What Is Cialis Used For?

Cialis is FDA-approved to treat 3 primary conditions in men:

  • ED (Erectile dysfunction)
  • Symptoms or signs of BPH (benign prostatic hyperplasia)
  • Combination of both ED and BPH
How Does Cialis Work?

How Does Cialis Work?

Cialis (tadalafil) works by helping increase blood flow to the penis during sexual arousal. Normally, the body releases a chemical called nitric oxide when a man is sexually stimulated, which triggers a process that relaxes blood vessels and allows more blood to enter the penis. Cialis enhances this natural process by inhibiting the enzyme PDE5, which would otherwise limit blood flow. The result is improved ability to get and maintain an erection, but only when sexual stimulation is present.

Cialis Dosage Guide

Cialis Dosage Guide

The Cialis dosing schedule is outlined in the table below for easy reference.

Condition / UseCialis DoseTimingNotes
Cialis for Erectile Dysfunction (as needed)10 mg before sexual activityAt least 30 minutes priorMay be adjusted to 5 mg (lower) or 20 mg (higher) based on response and tolerance. Do not exceed once daily. The effect may last up to 36 hours.
Cialis for Erectile Dysfunction (daily use)2.5 mg once dailySame time each dayMay increase to 5 mg daily if needed. Allows for more spontaneous sexual activity.
Cialis for Benign Prostatic Hyperplasia (BPH)5 mg once dailySame time each dayTaken consistently, it improves urinary symptoms.
Cialis for ED and BPH (combined treatment)5 mg once dailySame time each dayApproved for men with both conditions.
Cialis for Kidney impairment (moderate)≤5 mg every 24-48 hoursAdjusted by the doctorSevere impairment or dialysis- avoid daily use, limit to ≤5 mg every 72 hours.
Cialis for Liver impairment (mild/moderate)≤10 mg once dailyAs prescribedNot recommended in severe liver impairment.
Cialis maximum dose20 mgOnce per dayNever exceed this limit.

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How to Take Cialis Tablets?

How to Take Cialis Tablets?

Consider the following Cialis administration guidelines for effective use:

  • Cialis for erectile dysfunction (ED):
    • The usual starting dose of Cialis is 10 mg, taken when needed, at least 30 minutes before sexual activity.
    • Depending on response & tolerance, the dose may be adjusted to Cialis 5 mg or increased to 20 mg.
    • Do not take more than one tablet per 24-hour period.
  • Cialis for daily use (ED or benign prostatic hyperplasia):
    • The recommended dose of Cialis is 2.5 mg or 5 mg once daily, taken at the same time each day.
  • Swallow the tablet whole with water. It can be taken with or without food.
Cialis Side Effects: Common, Mild, and Serious

Cialis Side Effects: Common, Mild, and Serious

Cialis side effects may include:

Common Side Effects of Cialis TabletsPriapismRare or Serious Side Effects of Cialis Tablets
HeadacheDiarrheaSudden vision loss
Upset stomachAbdominal painSudden hearing loss
Back painDizzinessChest pain
Muscle painIndigestionIrregular heartbeat and changes in blood pressure
Stuffy noseHeartburnPriapism
Skin flushingUpper respiratory infectionSevere allergic reaction

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Cialis Warnings

Cialis Warnings

  • Do not use Cialis with nitrate medications (e.g., nitroglycerin, isosorbide dinitrate, recreational “poppers”), as this may lead to a major drop in blood pressure levels.
  • Cialis should not be taken if sexual activity is unsafe due to heart disease, recent heart stroke or attack, unstable angina, or severe heart failure.
  • Seek emergency medical help if an erection lasts longer than 4 hours (priapism), as this can cause permanent damage.
  • Stop Cialis immediately and seek urgent care if sudden vision loss occurs. This may be linked to NAION (non‑arteritic anterior ischemic optic neuropathy).
  • Sudden hearing loss, sometimes accompanied by dizziness or tinnitus, has been reported in patients taking Cialis tablets. In that situation, discontinue the use of this medication and consult a physician immediately.
Cialis Precautions

Cialis Precautions

  • Use Cialis cautiously in patients with moderate kidney impairment. Avoid daily use in severe kidney disease or dialysis.
  • Avoid Cialis in severe liver disease.
  • Before prescribing Cialis for benign prostatic hyperplasia (BPH), other causes of urinary symptoms should be ruled out.
  • Patients with bleeding disorder issues or active peptic ulcers should use Cialis cautiously, as it may affect platelet function.
  • Cialis does not protect against STIs (sexually transmitted infections). So, safe sexual practices remain necessary.
  • Older adults may be more prone to common side effects such as back pain or indigestion while taking Cialis tablets.
  • Avoid excessive alcohol while taking Cialis, as this may increase the risk of dizziness, fainting, or low blood pressure.
What Happens If I Miss a Day of Cialis?

What Happens If I Miss a Day of Cialis?

If you miss a day of Cialis, the effect depends on how you take it. For the daily low‑dose regimen, skipping one pill of Cialis usually isn’t harmful. However, it can lower the steady level of tadalafil in your body and reduce its effectiveness until you resume. Do not double the next Cialis dose. Simply continue with your regular Cialis dosing schedule. If missed doses happen often, it’s best to discuss with your doctor.

Cialis Overdose: How Much Is Too Much Cialis?

Cialis Overdose: How Much Is Too Much Cialis?

An overdose of Cialis means taking more than the recommended dose, which is usually 20 mg once a day. Going beyond this amount does not improve results and can cause problems like headache, dizziness, low blood pressure, chest pain, or a prolonged erection that needs medical care. If you suspect a Cialis overdose, contact the poison control center or your healthcare provider immediately.

Should Cialis Be Refrigerated?

Should Cialis Be Refrigerated?

No, Cialis (tadalafil) does not require refrigeration. Follow these Cialis storage guidelines:

  • Cialis tablets should be stored at a temperature between 68°F-77°F (20 °C-25 °C).
  • These tablets should be kept in a dry place away from direct light and moisture.
  • Keep Cialis tablets in their original packaging until use. It helps maintain stability and effectiveness.
  • During transport, Cialis may be safely stored at temperatures between 59°F-86°F (15 °C-30 °C) for short periods.
  • Store Cialis (tadalafil) tablets out of reach of children and pets.
Cialis Interactions

Cialis Interactions

Cialis (tadalafil) can interact with several medications. Here are the top 10 tadalafil (Cialis) interactions you should know about:

  • Nitroglycerin
  • Doxazosin
  • Amlodipine
  • Metoprolol
  • Lisinopril
  • Sildenafil (Viagra)
  • Vardenafil (Levitra)
  • Ritonavir
  • Ketoconazole
  • Erythromycin
What Can I Use Instead of Cialis?

What Can I Use Instead of Cialis?

When considering Cialis alternatives, here are some options:

  • Viagra
  • Trintellix
  • Adcirca
  • Levitra
  • Revatio
  • Caverject
  • Muse
Why Buy Cialis Online from Polar Bear Meds?

Why Buy Cialis Online from Polar Bear Meds?

A high Cialis cost can make erectile dysfunction and BPH symptoms treatment difficult for many patients. That is why people choose Polar Bear Meds. When you buy Cialis online from Canada with us, you can save significantly compared to U.S. pharmacy prices. We provide Cialis for erectile dysfunction & BPH symptoms at prices up to 80% lower, helping men access treatment without financial stress.

We source Cialis from licensed Canadian pharmacies to ensure safety and quality. New customers can save even more with our Cialis coupon code “WELCOMEPB10”, which gives 10% off your first order. With fast delivery in 3-5 business days through Xpress Post, getting Cialis is simple, affordable, and convenient.

Important Disclaimer

Important Disclaimer

The information provided about Cialis (tadalafil) is intended for general educational purposes only and should not replace professional medical advice. Cialis is a prescription medication that must be taken only under the guidance of a licensed healthcare provider. Cialis dosage, safety considerations, and potential side effects may vary based on the health status and other medications. Never start, stop, or adjust Cialis without consulting your doctor. If you experience sudden hearing or vision loss, or an erection lasting more than four hours, seek emergency medical care immediately.

Cialis FAQs

Cialis FAQs

Dr. Jackson Miller

Medically Reviewed by Dr. Jackson Miller (M.D)

Dr. Jackson Miller is a board-certified medicine physician & hospitalist. He is a healthcare professional with a strong background in patient care. With years of experience and a patient-first approach, he believes the foundation of good health is a patient who feels informed and empowered. He contributes to medical content review, drawing on his background in clinical practice and patient education. He focuses on presenting health information in a clear, accurate, and accessible way to help readers make informed decisions. His work emphasizes clarity, evidence-based guidance, and understandable explanations of medical topics.

Find Dr. Jackson Miller on:LinkedIn

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