Tadalafil is not available over the counter in the United States. It remains a prescription-only medication for all its approved uses, including erectile dysfunction and an enlarged prostate. However, the UK reclassified a low-dose tadalafil product for pharmacy sale without a prescription, and getting a prescription in the U.S. has become significantly easier through telehealth services.
Why Tadalafil Still Requires a Prescription in the U.S.
Every tadalafil product approved by the FDA, whether branded Cialis or generic, requires a prescription. This applies to the oral tablets used for erectile dysfunction and the liquid formulation used for pulmonary arterial hypertension. No manufacturer has submitted an application to make tadalafil available over the counter in the U.S., and the FDA has not signaled any plans to reclassify it.
The prescription requirement exists largely because tadalafil has a serious, potentially life-threatening interaction with nitrate medications (used for chest pain and heart conditions). Combining the two can cause blood pressure to drop so severely it leads to cardiovascular collapse. A prescriber screens for this and other cardiovascular risk factors before writing the prescription. Tadalafil also stays active in the body for a long time, with a half-life of about 17.5 hours, meaning its effects and potential interactions linger much longer than similar medications.
The UK Exception: Cialis Together
The UK’s medicines regulator, the MHRA, reclassified a product called Cialis Together as a pharmacy medicine, making it the first tadalafil product available without a prescription anywhere in a major regulated market. It contains 10 mg of tadalafil and can be purchased directly from a pharmacy after a consultation with the pharmacist.
The restrictions are specific. Buyers must be men over 18 with erectile dysfunction. The maximum dose is one tablet per day, and the maximum pack size is 8 tablets. Pharmacists are required to screen customers before selling it, and the product is not sold to people with severe cardiovascular disorders, high cardiovascular risk, severe kidney or liver failure, or those taking certain interacting medications. This pharmacist-led screening replaces the traditional doctor visit but still provides a safety check, particularly for the nitrate interaction.
This UK reclassification does not affect availability in the U.S., Canada, Australia, or other countries where tadalafil remains prescription-only.
How to Get a Prescription in the U.S.
While you can’t buy tadalafil off a shelf, getting a prescription is more straightforward than it used to be. Telehealth platforms now offer consultations specifically for erectile dysfunction, often completed in a single online visit. Most states require more than just filling out a questionnaire. You’ll typically need a live interaction (video or phone) with a licensed provider who verifies your identity, takes a medical history, documents a diagnosis, and creates a treatment plan. A few states have stricter requirements, but the general standard is that the telehealth visit must meet the same clinical bar as an in-person appointment.
Your primary care doctor or a urologist can also prescribe tadalafil during a routine visit. There’s no specialized testing required in most cases. The provider mainly needs to confirm you don’t have cardiovascular conditions or take medications that would make tadalafil dangerous.
Dosages and How They Differ
Tadalafil is prescribed at different doses depending on how you plan to use it. For as-needed use before sexual activity, the standard starting dose is 10 mg taken about 30 minutes beforehand, no more than once a day. For daily use, the dose drops to 2.5 mg or 5 mg taken at the same time each day regardless of when sexual activity occurs. The 5 mg daily dose is also used for men with an enlarged prostate, sometimes addressing both conditions at once.
The daily approach eliminates the need to plan around a pill, which some men prefer. The as-needed approach means you’re only taking medication when you want it. Your prescriber will help determine which makes more sense based on how frequently you’re sexually active and whether you have overlapping prostate symptoms.
Cost of Generic vs. Brand-Name Cialis
Generic tadalafil has made the medication dramatically more affordable. Brand-name Cialis at the 20 mg strength runs roughly $55 per tablet without insurance, totaling over $1,600 for a 30-tablet supply. Generic tadalafil at the 5 mg daily dose costs between $0.48 and $0.65 per tablet, putting a month’s supply under $20. That price difference is one reason generic tadalafil has become one of the most commonly prescribed erectile dysfunction medications.
Insurance coverage varies. Many plans cover generic tadalafil, especially the 5 mg dose prescribed for an enlarged prostate. Coverage for erectile dysfunction specifically is less consistent. Pharmacy discount programs and manufacturer coupons can bring cash prices down further.
Watch Out for “Natural” OTC Alternatives
Because tadalafil isn’t sold over the counter, a market of supplements marketed as “natural male enhancement” has filled the gap. The FDA maintains an active and growing list of these products that contain hidden, undeclared pharmaceutical ingredients, often including tadalafil itself or similar compounds. These products are sold online, in gas stations, and in convenience stores, frequently advertised as dietary supplements or all-natural remedies.
The danger is real. Without knowing the actual dose of the active ingredient, you can’t predict interactions with other medications. Someone taking nitrates who buys what they think is an herbal supplement could unknowingly be taking tadalafil at an uncontrolled dose. The FDA has flagged hundreds of these products and warns that they “pose a serious health risk and are not guaranteed to work.”
Common Side Effects
In long-term clinical trials lasting 18 to 24 months, the most frequently reported side effects were headache (15.8%), indigestion (11.8%), cold-like symptoms such as a stuffy or runny nose (11.4%), and back pain (8.2%). These are generally mild and tend to decrease with continued use. About 6.3% of participants stopped taking the medication because of side effects, and no single side effect drove more than 1% of people to quit.
Back pain and muscle aches are somewhat unique to tadalafil compared to other erectile dysfunction medications, likely related to its longer duration in the body. These typically appear 12 to 24 hours after taking a dose and resolve on their own within a couple of days.