Yes, generic Cialis exists and has been widely available in the United States since 2018. The active ingredient is tadalafil, and it works identically to brand-name Cialis. The first generic version was approved by the FDA on May 22, 2018, manufactured by Teva Pharmaceuticals. Since then, more than 30 additional generic versions have been approved, which has driven prices down significantly.
How Generic Tadalafil Compares to Brand Cialis
Generic tadalafil contains the same active ingredient at the same dose as brand-name Cialis. The FDA requires every generic to prove bioequivalence before approval, meaning the drug enters your bloodstream at the same rate and reaches the same concentration as the brand version. In testing, generic tadalafil matched Cialis within about 97% for both peak blood levels and total absorption, well within the FDA’s required range. For practical purposes, the two are interchangeable.
The only differences are cosmetic: the pill shape, color, and inactive ingredients (fillers, coatings) may vary by manufacturer. These inactive ingredients don’t affect how the drug works. In rare cases, someone with a specific allergy to an inactive ingredient might need a different manufacturer’s version, but this is uncommon.
Available Dosages
Generic tadalafil comes in the same dosage options as brand Cialis, and it’s prescribed in two distinct ways depending on how you plan to use it.
For as-needed use, the typical starting dose is 10 mg taken about 30 minutes before sexual activity, no more than once per day. Your prescriber may adjust this up or down based on how well it works and whether you experience side effects.
For daily use, the dose is much lower: 2.5 mg or 5 mg taken at the same time every day, regardless of when sexual activity happens. The daily approach keeps a steady level of the drug in your system so you don’t need to plan around taking a pill. The 5 mg daily dose is also used to treat symptoms of an enlarged prostate, such as weak urine stream, frequent urination, or difficulty starting urination.
The Price Difference Is Substantial
This is likely the biggest reason you’re searching. Without insurance, brand-name Cialis 20 mg costs roughly $55 per tablet, putting a 30-tablet supply around $1,650. Generic tadalafil 5 mg, by contrast, runs about $0.48 to $0.65 per tablet, or $14 to $20 for a 30-day supply. Even accounting for dose differences, the generic costs a fraction of the brand price.
Insurance plans have taken notice. Many insurers now require you to try generic tadalafil before they’ll cover brand Cialis at all. Cigna’s policy, for example, only covers brand Cialis if you’ve already tried the generic and can’t tolerate it due to an allergy to a specific inactive ingredient. If your plan covers erectile dysfunction medications, generic tadalafil is almost always the version on the formulary.
What It Treats
Generic tadalafil is FDA-approved for the same conditions as brand Cialis. It treats erectile dysfunction in adult men and also relieves symptoms of benign prostatic hyperplasia (an enlarged prostate), including difficulty urinating, weak stream, incomplete bladder emptying, and urinary urgency. Some men have both conditions, and a single daily dose can address both at once.
Common Side Effects
Because the active ingredient is identical, generic tadalafil carries the same side effect profile as brand Cialis. The most frequently reported effects in clinical trials, each occurring in at least 2% of users, include headache, indigestion, back pain, muscle aches, nasal congestion, and flushing. These tend to be mild and often diminish after your body adjusts to the medication over the first few uses.
With daily use, the list of commonly reported effects is slightly longer and includes upper respiratory symptoms, cough, diarrhea, and acid reflux. This likely reflects the fact that daily users take the drug continuously rather than occasionally.
Who Should Not Take It
Tadalafil has one critical interaction: it cannot be combined with nitrate medications. Nitrates are prescribed for chest pain and include nitroglycerin (in tablets, sprays, patches, or ointments), isosorbide dinitrate, and isosorbide mononitrate. Recreational drugs known as “poppers” (amyl nitrite, butyl nitrite) also contain nitrates. Combining tadalafil with any nitrate can cause a dangerous drop in blood pressure.
You also shouldn’t take tadalafil alongside other medications in the same drug class, such as sildenafil (Viagra) or a pulmonary hypertension medication that contains tadalafil under a different brand name. If you take alpha-blocker medications for prostate symptoms, combining them with tadalafil is not recommended due to the risk of low blood pressure.
Buying Safely Online
The availability of cheap generic tadalafil online has created a market for counterfeit pills. The FDA has identified counterfeit versions of Cialis entering the U.S. with telltale signs: misspellings on the label, missing NDC numbers, incorrect manufacturer addresses, and unusual packaging colors. Counterfeits may contain the wrong dose, the wrong ingredient, or nothing at all.
The safest approach is to fill your prescription through a state-licensed U.S. pharmacy, whether that’s a brick-and-mortar location or a verified online pharmacy. The FDA’s BeSafeRx program maintains a list of warning signs for illegitimate online sellers. Any site that offers tadalafil without requiring a prescription is operating outside U.S. law and should be avoided.