01Three locked tablets, three cash boards
Shop-pipe searches mash Cialis, Viagra, and Levitra into one 'ED pill price' and then quote a per-tablet average that never lived on a label. This sheet refuses that mash. The Qivana lock is tadalafil 10 mg as needed, sildenafil 25 mg or 50 mg, and vardenafil 20 mg. Other strengths exist. They are not priced here.
GoodRx tablet tables, read for this rail, print generic tadalafil 10 mg x 30 at $2,172.94 average retail and $18.77 with a coupon; generic sildenafil 25 mg x 10 at $67.14 / $13.53 and 50 mg x 10 at $646.10 / $11.35; generic vardenafil 20 mg x 10 at $573.78 / $44.21 (06 July 2026 for the Levitra board). Those are pack prices, not a checkout on qivanarx.com.
Mateo Ruiz seals the Barcelona align on 21 August 2026. The magazine teaches. [email protected] takes source corrections, not dose requests. A prescription still has to meet a farmacia or a US window. Read the tadalafil, sildenafil, and vardenafil vaults for molecule depth; stay here when the question is which locked count the cash board is actually quoting.
02QT footnote and CYP3A4 caps that break coupon logic
Vardenafil 20 mg is the lock that brings a QT conversation. Therapeutic and supratherapeutic doses prolonged QTc in a controlled study similarly to moxifloxacin; a later study with gatifloxacin showed an additive millisecond change. Clinical impact of those milliseconds is unknown, which is why the label says avoid - not 'monitor and hope' - in congenital QT and Class IA/III users.
Ritonavir is the coupon-killer. It raised sildenafil exposure about 11-fold; cap 25 mg per 48 hours. It raised vardenafil AUC about 49-fold and stretched half-life toward 26 hours; cap 2.5 mg per 72 hours. Tadalafil as-needed stays at this sheet's 10 mg lock but only every 72 hours. A window pricing Levitra 20 x 10 for a boosted protease-inhibitor chart is selling the wrong tablet.
Ketoconazole, itraconazole, clarithromycin, and erythromycin pull similar levers with their own mg caps. Grapefruit is a weaker, sloppier 3A4 story; it is still a bad mixer on a first trial. Inducers such as rifampin can flatten tadalafil enough that a 10 mg weekend plan disappoints for enzyme reasons, not because the coupon was 'weak generic.'
04What a Cialis 10 x 30 board actually prints
Thirty generic tadalafil 10 mg tablets is the weekend-start lock on this magazine. The Cialis label starts most as-needed patients at 10 mg before anticipated activity, then allows a move to 20 mg or down to 5 mg. Food does not steer absorption. Erectile function in the as-needed trials stayed above placebo out to 36 hours, which is why Friday dosing still shows up in Sunday plans.
The cash shock is the retail column: $2,172.94 for that thirty-count before a coupon collapses it to $18.77. Walk-up cash and discount-card cash are not cousins. Ask the window for generic tadalafil 10 mg, quantity thirty. If the pharmacist hears 'Cialis' and keys a 20 mg thirty-count, you have left this rail. Daily 2.5 mg and 5 mg bottles are a different indication rhythm and a different GoodRx row.
Per-tablet coupon math from $18.77 / 30 is about sixty-three cents. That number is useful only after the count is right. A telehealth ad that says 'tadalafil under a dollar' is often averaging 20 mg or a 90-count. This sheet will not invent those dollars. Pair the board with the weekend glow pulse if the real question is Friday-to-Sunday coverage, not the receipt.
| Lock | Count on the board | GoodRx retail | GoodRx coupon |
|---|---|---|---|
| Tadalafil 10 mg PRN (Cialis generic) | 30 tablets | $2,172.94 | $18.77 |
| Sildenafil 25 mg (Viagra generic) | 10 tablets | $67.14 | $13.53 |
| Sildenafil 50 mg (Viagra generic) | 10 tablets | $646.10 | $11.35 |
| Vardenafil 20 mg (Levitra generic) | 10 tablets | $573.78 | $44.21 |
05Price reviews that skip the locked count
Commercial roundups in 2026 still publish 'sildenafil $0.30 to $3' and 'tadalafil $0.50 to $4' without naming strength or quantity. Those ranges can be true for some NDCs at some chains on some Tuesdays. They are useless for a man holding a script that says 10 mg tadalafil #30 or sildenafil 25 mg #10.
SingleCare-style Cialis-versus-Viagra posts often price daily tadalafil 5 mg x 30 against brand Viagra 100 mg x 10. That is a real comparison for someone on those products. It is not this rail. Brand Viagra 100 mg and daily Cialis 5 mg stay off this sheet so the SERP lock does not drift.
Telehealth subscriptions quote monthly bundles that mix 20 mg tadalafil with 50 or 100 mg sildenafil. Fine for their cart. Not a substitute for the GoodRx rows above. If a review cannot say '10 mg x 30' or '25 mg x 10' in the same sentence as the dollar, treat the dollar as atmosphere.
06Ten, twenty-five, and twenty are not a conversion chart
A 10 mg tadalafil tablet is not 'weaker' than a 20 mg vardenafil tablet, and a 50 mg sildenafil tablet is not 'twice as strong' as either. Each milligram number is local to that INN's dose-response curve. Registration trials did not run a three-way milligram swap.
Cialis as-needed: start 10 mg, max 20 mg, once daily in most patients; with ritonavir or other potent CYP3A4 inhibitors the as-needed cap is 10 mg every 72 hours. Viagra: usual 50 mg, 25 mg step-down, 100 mg ceiling, once daily; with ritonavir, 25 mg in 48 hours. Levitra: start 10 mg, ceiling 20 mg once daily; with ritonavir, 2.5 mg in 72 hours. The locks on this sheet collide with those caps in different ways.
If a friend says 'I take 20 of the yellow and you take 50 of the blue so yours is stronger,' the sentence is already broken. Open the matching vault. Do not scale coupons across INNs.
| Locked tablet | Label job on that INN | What this sheet will not price |
|---|---|---|
| Tadalafil 10 mg PRN | Usual as-needed start; food-open | Daily 2.5/5 mg; 20 mg PRN packs |
| Sildenafil 25 mg | Step-down / special-population start | 100 mg ceiling packs |
| Sildenafil 50 mg | Usual start for most men | 100 mg ceiling packs |
| Vardenafil 20 mg | Labeled ceiling, not the 10 mg start | 2.5/5/10 mg; Staxyn ODT |
07Which lock to price first - after the script exists
Price tadalafil 10 x 30 when the chart already chose as-needed tadalafil and the couple wants a long window without fasting. Do not price it as a secret daily regimen; daily therapy has its own 2.5 and 5 mg tablets.
Price sildenafil 50 x 10 when the chart chose the usual Viagra start and the man can keep a high-fat meal off the hour before the dose. Price 25 x 10 when the label reasons for a step-down are actually present, not when a blog said start low for everyone.
Price vardenafil 20 x 10 only when the chart already titrated to the ceiling and the QT list is clean. A first-fill Levitra 20 because '20 matches Cialis 10 on Instagram' is milligram folklore.
Switch INN after honest trials at the labeled lock - meal rules kept, nitrates absent, several attempts - not after one Saturday. Failed class after that pattern is a urology and cardiology problem, not a third coupon.
08Dinner tax on the 25-50 rungs
Mediterranean restaurant volume is not a low-fat meal because the oil is olive. Sildenafil's label allows food and then documents the high-fat penalty. Couples who buy the 50 mg coupon for Saturday dinner and swallow the tablet with the first course are running the delayed-peak study on themselves.
Tadalafil 10 mg does not need that fast. That is a pharmacokinetic convenience, not proof it is 'better.' Heavy alcohol still adds orthostasis on all three. Five or more drinks with tadalafil is a labeled hypotension warning, not a vibe.
Vardenafil 20 mg sits between: food is allowed, high-fat can still flatten the peak. If the only reason someone wants Levitra 20 is 'it works at dinner,' check whether they meant a light plate. The onset pulse is honest about that. This sheet will not sell a ceiling tablet as a food hack.
09Clocks on the three locked tablets
Tadalafil 10 mg: onset often from 30 minutes, Tmax around 2 hours, mean half-life 17.5 hours, activity quoted up to about 36 hours. That is the weekend argument. It is also the long nitrate-washout argument.
Sildenafil 25 or 50 mg: Tmax 30-120 minutes fasted (median 60), half-life about 4 hours, practical window about 4-6 hours. The 25 mg rung does not last longer because it is 'gentler.' Duration is the molecule, not the bargain.
Vardenafil 20 mg: Tmax often 30-120 minutes (median near 60) fasted, half-life about 4-5 hours, activity about 4-5 hours. Some men feel a faster peak on a light stomach; that is why the ceiling lock gets shop-pipe traffic. Fasted onset is not a reason to skip the QT list.
Shared mechanism is still PDE5 blockade after nitric oxide and cGMP. No stimulation, no useful erection, on any coupon. Class stop rules - priapism past four hours, sudden one-eye vision loss, sudden hearing drop - apply to all three locks.
| Clock row | Tadalafil 10 PRN | Sildenafil 25-50 | Vardenafil 20 |
|---|---|---|---|
| Typical onset / Tmax | 30 min; Tmax ~2 h | 30-60 min; Tmax median 60 min fasted | 25-60 min; Tmax median ~60 min |
| Half-life | ~17.5 h | ~4 h | ~4-5 h |
| Quoted window | Up to ~36 h | ~4-6 h | ~4-5 h |
| Food on the lock | May take with or without food | High-fat: Tmax +60 min, Cmax -29% | With or without food; high-fat can cut Cmax |
| Daily ED label | Exists at 2.5/5 mg - not this lock | No | No |
10Viagra 25 x 10 and 50 x 10 sit on two rails
Pfizer's Viagra label still starts most men at 50 mg about an hour before activity, with a window from 30 minutes to 4 hours, and allows a step to 25 mg or a ceiling of 100 mg once per day. Qivana locks the first two rungs. The 100 mg ceiling is named in the vault, not priced on this sheet.
The 25 mg ten-count prints $67.14 / $13.53. The 50 mg ten-count prints $646.10 / $11.35. Retail on 50 mg is not 'twice 25 mg.' Coupon on 50 mg can undercut coupon on 25 mg. Men who pick 25 mg to save money sometimes pay more per successful dose if 25 mg was never going to be enough and they waste a ten-count learning that. Men who pick 50 mg because a forum said 'real dose' may be the ones the label wanted on 25 mg - age over 65, Child-Pugh impairment, creatinine clearance under 30 mL/min, alpha-blocker start, or ritonavir.
High-fat food delays sildenafil Tmax about 60 minutes and cuts Cmax about 29%. That tax hits both rungs. A cheaper 25 mg tablet after paella is still a delayed peak. Fast around the dose or stop pretending the coupon fixes dinner. The fat-shift pulse is the timing note; this rail is the cash note.
11Which US windows will quote these locked counts
Qivana is not a pharmacy. The href in each row is that chain's official pharmacy page, not a coupon vendor. GoodRx numbers stay in the cash table caption. Ask the window to price the written lock: tadalafil 10 mg thirty tablets, sildenafil 25 or 50 mg ten tablets, or vardenafil 20 mg ten tablets.
Insurance step therapy may force a sildenafil trial before tadalafil. Document a food failure or an adverse effect on the 25-50 rungs before you argue for the weekend 10. A rejected Levitra 20 claim is not automatic permission to walk out with two INNs 'just in case.'
| Pharmacy | Ask the window | Official page |
|---|---|---|
| Wegmans | Generic tadalafil 10 mg x 30, or sildenafil 25/50 x 10 | Wegmans pharmacy |
| H-E-B | Same locks; confirm the mg on the label before they key 20 mg tadalafil | H-E-B pharmacy |
| Meijer | Vardenafil 20 mg x 10 if that is the script; Staxyn is a different fill | Meijer pharmacy |
| Walmart | Price the count on the script, not a blog's per-pill average | Walmart pharmacy |
12Levitra 20 x 10 still carries a high coupon
Vardenafil's labeled start is 10 mg about 60 minutes before activity. The dose may rise to 20 mg or fall to 5 mg. Maximum frequency is once per day. Qivana's SERP lock is the 20 mg ceiling, not the start. Staxyn orodispersible 10 mg is another product and another board.
GoodRx's Levitra table, 06 July 2026, lists generic 20 mg x 10 at $573.78 average retail and $44.21 with a coupon. That coupon is still several times the tadalafil 10 x 30 coupon even though you receive fewer tablets. Per-tablet coupon from the pack is about $4.42. Reviews that say 'vardenafil is cheap now' are often quoting a 10 mg thirty-count or a mail-order teaser this sheet does not own.
The 20 mg lock also inherits the QT language the other two labels do not stress the same way. Congenital long QT, quinidine, procainamide, amiodarone, sotalol: avoid vardenafil. A ceiling-strength coupon does not erase that row. Read the QT glow pulse before you tell a window to price Levitra 20 because a friend liked the onset.
13Seal the rail, then open one vault
The 21 August 2026 stamp on this sheet is editorial. GoodRx boards move. Labels move. If the leaflet in the box disagrees with a row, follow the leaflet and send the source to [email protected] so Mateo can send the card back to Assay.
Pay one locked count. Keep the nitrate wall. Fast for the sildenafil rungs if dinner is the plan. Skip Levitra 20 when the QT list is dirty. Then open the matching vault, not a second INN.