Questions this tray answers
Remy asks: What is generic Cialis? Generic Cialis is tadalafil in 2.5, 5, 10, or 20 mg tablets. Teva's ANDA 090141 was approved as bioequivalent to Lilly's Cialis tablets. The imprint can differ.
Ines asks: What is Cialis? Cialis is Lilly's brand tablet of tadalafil for erectile dysfunction and for BPH. The yellow almond is coded C 2 1/2, C 5, C 10, or C 20.
Tomas asks: How long does tadalafil last? The US label gives an as-needed window up to 36 hours versus placebo. Half-life is 17.5 hours. Sexual stimulation is still required.
Nia asks: How long does it take for Cialis to work? Cmax sits between 30 minutes and 6 hours, median 2 hours. A 20 mg stopwatch study recorded a significant response down to 16 minutes; 52% had a successful attempt within 30 minutes against 35% on placebo.
Oleg asks: What is tadalafil used for? The Cialis-family tablets treat erectile dysfunction, BPH, and both. Adcirca uses the same INN at 40 mg daily for PAH.
Saskia asks: What is tadalafil for BPH? BPH, and ED plus BPH, sit at 5 mg once a day. With finasteride the pairing is labelled up to 26 weeks. Alpha-blockers are not recommended for that BPH line.
Hugh asks: Where can you buy Cialis? A US pharmacy fills Cialis or generic tadalafil after a licensed clinician writes a prescription. The visit can be in clinic or on a licensed telehealth service.
Dina asks: Where can you buy tadalafil? Same gate: a licensed clinician writes the script, then a US pharmacy fills 2.5, 5, 10, or 20 mg at the counter or by licensed mail.
Cale asks: Can you buy tadalafil online? Yes if the visit is with a licensed clinician and the fill is a licensed US pharmacy. Ro, Sesame, Rex MD, Lemonaid, and Walgreens Virtual Care all start with that review. Sites that skip the prescription are not a US fill.
Petra asks: Can you buy Cialis over the counter? Not in the United States. In the UK, Cialis Together 10 mg is a pharmacy medicine after a pharmacist check.
Yves asks: What is the tadalafil dosage? Daily ED starts at 2.5 mg and may rise to 5 mg. As-needed starts at 10 mg, then 20 mg or 5 mg, once a day. BPH is 5 mg daily.
Noor asks: What is tadalafil 20 mg? Twenty milligrams is the labelled as-needed ceiling after a 10 mg start, not a daily tablet. Do not split it. Not more than once a day.
Ilya asks: How long does Cialis 5 mg last? The UK 5 mg leaflet says once-daily use can support an erection, when stimulated, at any time during the 24 hours of that day. Steady-state plasma sits within 5 days.
Rhea asks: How much does tadalafil cost? Drugs.com on 6 October 2026 listed 5 mg from $10.92 for 8 tablets and 10 mg from $10.05 for 4. Those are cash prints on that board.
Kat asks: What is Adcirca? Adcirca is tadalafil 20 mg tablets taken as 40 mg once daily for PAH. It is not interchangeable with Cialis.
Bo asks: Can women take Cialis? The US carton is not indicated for females. Addyi and Vyleesi are the FDA-labelled HSDD products.
June asks: What are the side effects of tadalafil? Headache, dyspepsia, back pain, and myalgia lead the as-needed table; headache reached 15% on 20 mg. Back ache often starts 12 to 24 hours later and eases within 48 hours.
Wes asks: Can you take Cialis with nitrates? No. Nitrates stay a stop. If a nitrate is still needed in an emergency, the label wants 48 hours after the last tadalafil dose and close monitoring. Riociguat is a separate stop.
Mina asks: Is tadalafil the same as Cialis? Yes for the 2.5, 5, 10, and 20 mg ED/BPH tablets. Adcirca is the same INN on a 40 mg PAH carton and is not interchangeable with Cialis.
Sol asks: Does food affect tadalafil? The US label says the tablet may be taken without regard to food.
Tess asks: What is the brand name for tadalafil? Cialis is the ED and BPH brand. Adcirca is the PAH brand.
Generic Cialis is the same tadalafil
An approved generic Cialis tablet holds the same 2.5, 5, 10, and 20 mg oral strengths as Lilly's brand. FDA approved Teva's ANDA 090141 on 22 May 2018 as bioequivalent and therapeutically equivalent to Cialis tablets. Teva launched that first-to-file generic in the United States on 27 September 2018.
Lilly's brand is a yellow almond-shaped film-coated tablet: C 2 1/2, C 5, C 10, or C 20. One generic USP line in DailyMed is a light yellow oval film-coated tablet debossed T21/2, T5, T10, or T20. Teva's later US catalogue prints pale yellow ovals coded 09, 10, and 11 on the 5, 10, and 20 mg strengths. Inactive ingredients can differ. The stamped tadalafil strength stays 2.5, 5, 10, or 20 mg.
Daily 2.5 mg can go to 5
Once-daily tadalafil for ED starts at 2.5 mg at about the same time each day, without regard to the hour of sexual activity. The labelled next step is 5 mg if the lower strength is tolerated and still short. BPH, and ED plus BPH, skip that 2.5 mg start and sit at 5 mg. The UK 5 mg patient leaflet says that once-daily tablet can support an erection, when sexually stimulated, at any time during the 24 hours of the day. European product information puts steady-state plasma concentrations within 5 days of once-daily dosing. DailyMed's US sheet calls that lane continuous plasma tadalafil levels.
The as-needed lane starts at 10 mg before anticipated sexual activity, then 20 mg or 5 mg. Twenty milligrams is the labelled as-needed ceiling, not a daily tablet. The US sheet says do not split the tablet, and not more than once a day. EMA writes that continuous daily use of the 10 or 20 mg strengths is not recommended. Do not add a 10 or 20 mg tablet on a day that already carried daily 2.5 or 5 mg.
Creatinine clearance below 30 mL/min takes daily use off the table. Between 30 and 50 mL/min, daily use starts at 2.5 mg.
BPH stays on 5 mg daily
The BPH line, and the ED-plus-BPH line, are 5 mg once a day at about the same hour. When BPH treatment starts with tadalafil and finasteride together, that 5 mg pairing is labelled for up to 26 weeks. The incremental benefit of adding tadalafil after week 4 shrinks through week 26, and the sheet does not claim a benefit past that window.
Alpha-blockers are not recommended with tadalafil for BPH. A man already on an alpha-blocker for prostate symptoms is told to stop it at least one day before daily tadalafil for BPH. Creatinine clearance below 30 mL/min again bars the daily tablet. Between 30 and 50 mL/min, start at 2.5 mg and move to 5 mg only if the response supports it.
How long the labelled window lasts
The Cialis US label says as-needed tadalafil improved erectile function compared to placebo up to 36 hours after the dose. Mean terminal half-life in healthy subjects is 17.5 hours. Mean oral clearance is 2.5 L/hr. About 61% of a dose leaves as metabolites in feces and about 36% in urine. Sexual stimulation is still required.
How long it takes to work
After a single oral dose, Cmax sits between 30 minutes and 6 hours, median 2 hours. In a stopwatch study of 223 men, 39 of 75 on tadalafil 20 mg (52%) had at least one successful intercourse attempt within 30 minutes, against 26 of 74 (35%) on placebo. The 20 mg response was significant from 30 minutes down to 16 minutes.
What tadalafil is used for
The 2.5, 5, 10, and 20 mg Cialis-family tablets treat erectile dysfunction, the signs and symptoms of BPH, and both together. FDA first approved the Cialis tablet in 2003.
The same INN is sold as Adcirca, a 20 mg tablet taken as 40 mg once daily (two tablets) for pulmonary arterial hypertension, WHO Group 1, to improve exercise ability. Splitting that 40 mg across the day is not recommended. The Adcirca carton says not to take Cialis or another PDE5 inhibitor during that treatment. FDA approved Adcirca for PAH in 2009.
Where a US pharmacy fills it
Walgreens Virtual Care, Sesame, Ro, Rex MD, and Lemonaid all put the same gate on a US tadalafil fill, including a buy-online visit: a licensed clinician writes a prescription, then a pharmacy dispenses 2.5, 5, 10, or 20 mg. Sesame sends that script to a nearby counter. Ro, Rex MD, and Lemonaid mail from a licensed pharmacy after the review. Walgreens' tadalafil FAQ says the tablet is not sold over the counter in the United States. Lemonaid lists 5, 10, and 20 mg and does not prescribe 2.5 mg. Ro lists all four strengths.
Cialis Together is a UK pharmacy pack
A US counter does not sell tadalafil without a prescription.
In the United Kingdom, MHRA reclassified Cialis Together 10 mg as a pharmacy medicine for men 18 and older with erectile dysfunction, after a pharmacist check. Maximum is one tablet a day and a pack of 8. Other tadalafil strengths stay prescription-only there.
Opella announced in January 2025 that FDA had lifted a hold on an actual-use trial for a US Cialis switch. ClinicalTrials.gov NCT06805513, tadalafil 5 mg with a digital health survey, completed primary collection on 2 March 2026. Completion of that trial is not an OTC approval.
Headache, back pain, and myalgia
The as-needed Cialis table (≥2% and more often than placebo) lists headache at 15% on 20 mg, dyspepsia 10%, back pain 6%, and myalgia 3%, against 5%, 1%, 3%, and 1% on placebo. Nasal congestion, flushing, and pain in limb each sat at 3% on 20 mg.
Back pain or myalgia in the pharmacology trials generally began 12 to 24 hours after the dose and typically resolved within 48 hours. The discomfort was described as diffuse bilateral lower lumbar, gluteal, thigh, or thoracolumbar ache, worse when lying down. About 0.5% of men on as-needed Cialis stopped because of it.
Nitrates wait 48 hours
Any organic nitrate is a stop. In a life-threatening chest-pain case where a nitrate is still judged necessary after tadalafil, the label wants at least 48 hours after the last dose, and only under close hemodynamic monitoring. Princeton IV's 48-hour class wait sits on the heart guide.
Riociguat (Adempas) is a separate stop. Adempas labeling says discontinue tadalafil at least 48 hours before the first riociguat dose, and discontinue riociguat at least 24 hours before a PDE5 inhibitor.
Cialis is not labelled for women
The US Cialis carton says tadalafil is not indicated for use in females. The UK SmPC uses the same line. Addyi (flibanserin) 100 mg at bedtime is indicated for acquired, generalized hypoactive sexual desire disorder in premenopausal women; Vyleesi (bremelanotide) is a premenopausal HSDD injection.
Tadalafil versus sildenafil
Verywell Health and the two US labels split the pair on clock, food, and BPH. As-needed tadalafil is labelled out to 36 hours and may be taken without regard to food; daily 2.5 or 5 mg is a second ED lane, and 5 mg daily is the BPH carton. Sildenafil's labelled ED window is 30 minutes to 4 hours, a high-fat meal delayed Tmax about 60 minutes, and the Viagra sheet has no daily ED carton and no BPH indication. Both labels keep the nitrate stop. The Cialis sheet says not to combine Cialis with another PDE5 inhibitor.
What Drugs.com printed for cash tadalafil
Drugs.com's tadalafil price guide, read 6 October 2026, listed 5 mg oral tablets from $10.92 for 8 tablets, 10 mg from $10.05 for 4 tablets, and 20 mg from $77.83 for 60 tablets. Those are cash prints on that board, not a copay and not a promise at a named pharmacy counter.
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