Cialis 20mg Daily, and the Two Routes That Are Actually Licensed

Tadalafil is one drug carrying two separate licensed regimens, and a surprising number of the questions people ask about dosing turn out, underneath, to be questions about which of the two they are actually on.

NICE notes that while PDE5 inhibitors arrived as on-demand treatments, tadalafil "has also been approved for continuous, everyday use at 2.5 mg and 5 mg doses". That approval came afterwards and covered two specific low strengths. The higher strengths retained the original terms: taken when wanted, capped at one dose in any 24 hours.

So what sits in front of you is not a choice of tablet size. It is a choice between a medicine that is permanently present and a medicine summoned for particular occasions. The strengths differ because the patterns differ, not the reverse.

Key Points

• Cialis 20mg daily is not a licensed regimen. 20mg is licensed for as-needed use only, capped at one dose in any 24 hours
• Continuous everyday use of tadalafil is approved at 2.5mg and 5mg
• No published safety evidence describes 20mg Cialis every day, because the daily studies used the daily strengths
• The higher strengths are taken only when needed, capped at one dose in any 24 hours
• Daily dosing reaches a steady level inside 5 days, and the product page frames this as 3 to 5 days for full effect
• An as-needed dose acts from around 30 minutes, peaks near 2 hours, and efficacy is maintained for up to 36 hours
• Tadalafil's mean half-life is 17.5 hours in healthy individuals
• Daily tadalafil should not be combined with an additional as-needed dose unless a prescriber directs it specifically
• The 5mg tablet carries a further licence, issued October 2012, for the signs and symptoms of benign prostatic hyperplasia
• Both routes are prescription only, following an online consultation with UK registered prescribers

The Two Licensed Ways of Taking Tadalafil

One molecule, assessed twice, for two different jobs.

Continuous Everyday Use

A low strength swallowed once a day at roughly the same hour, so the medicine sits in the body permanently rather than being introduced for a particular evening. Approved for this at 2.5mg and 5mg.

Because the drug accumulates, this route has a warm-up. Steady state, the level at which the amount present stops climbing and holds, arrives inside 5 days of once-daily dosing. Forming a verdict on day one or two is forming a verdict before the regimen has finished arriving.

Use When Needed

A higher strength taken ahead of anticipated activity, capped at one dose per 24 hours. No warm-up applies, because each dose carries the entire load by itself.

A single dose becomes effective from around 30 minutes, peaks near the 2-hour mark, and efficacy is maintained for up to 36 hours. That long tail is frequently sold as the headline advantage, and it is one, but it describes a window during which the medicine can work, not a switch left permanently on. Arousal remains necessary throughout.

Why the Daily Strength Is So Much Smaller

From a standing start, a dose must be substantial enough to generate an effect unaided. Where a steady level already exists, a far smaller tablet holds it there.

So the daily strength is not a diluted edition of the as-needed one. It is whatever quantity maintains a level already established, which means the mental arithmetic people run, setting one tablet against another as though the milligrams were directly comparable, describes neither regimen accurately.

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How to Choose Between Them

Both are licensed and neither is a compromise. In most cases the deciding factors are practical rather than clinical, which is exactly why the decision belongs in a consultation rather than a shopping basket.

What Points Towards Each Route

The table is not built to crown a winner. Read down both columns; one of them will sound more like your life than the other, and that recognition is the useful thing to carry into a consultation.

What Should Not Decide It

The belief that a bigger number on the tablet means a stronger medicine. On the daily route the smaller tablet performs a different task, not an inferior one.

Nor the price of a single tablet, since the two routes consume tablets at wildly different rates. The next section puts real figures against that. And convenience should not outrank the clinical picture: your other medicines, blood pressure and cardiovascular history all bear on which route is appropriate.

What a Month on Each Route Actually Costs

This is where per-tablet comparisons fall apart, so here are the real numbers.

On the daily route, arithmetic is simple, because consumption is fixed at one tablet a day.

On the as-needed route, there is no monthly figure, because consumption depends entirely on you.

Put those side by side and something useful emerges. Four as-needed doses in a month costs £40.49. Eight costs £76.49, within a few pounds of an entire month of daily treatment at £80.99, which supplies 28 tablets rather than 8.

So there is a crossover point, roughly around eight or nine occasions a month, above which the daily route stops being the more expensive option and becomes the cheaper one. Below it, the as-needed route costs less.

That is a genuinely useful thing to know, and it is also not a reason to choose. Cost tracks the pattern of use, and the pattern of use is what a prescriber is assessing anyway, so the money tends to follow the clinical answer rather than compete with it. Prices are standard, quoted before any code, and may change.

Maximum Dose: Why "One a Day" Means Two Different Things

Both routes cap at one dose per 24 hours, which is precisely why they get muddled.

On the daily route, one a day is the instruction. On the as-needed route, one a day is the limit. Identical number, opposite meaning, and reading it the wrong way round is the commonest dosing error with this medicine.

Two doses in a day sits outside the licence either way. Never add a second tablet because the first seemed not to land, and never compensate for a forgotten dose by taking two. Given how long tadalafil persists, a dose that appears slow has usually not finished rather than failed.

Never Run Both Routes Together

A daily tablet with an as-needed dose stacked on top breaches the ceiling for either route on its own. It is the single most common thing that goes wrong when someone arranges a change of regimen for themselves, and it is why a switch is a prescribing decision rather than a purchasing one.

Alternate Days Is Not a Middle Path

Some people attempt to invent a halfway house by taking a higher strength every second day. That is not among the licensed regimens, and the pharmacology explains why it fails to deliver what it promises.

At a mean half-life of 17.5 hours, a dose landing 48 hours after the last one arrives while a measurable quantity of its predecessor is still circulating. So it is neither clean occasional use nor the accumulation pattern the daily route was studied at. It occupies the gap between two things that were each assessed, in a spot that never was.

The licensed middle path already exists. It is the daily strength.

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Can You Take 20mg Cialis Daily?

Not within the licence, and this is worth answering directly because it is one of the most searched questions about the medicine.

20mg is a licensed tadalafil strength, but it is licensed for as-needed use: one dose before anticipated activity, capped at one in any 24 hours. Continuous everyday use was approved separately, and that approval named 2.5mg and 5mg. There is no licensed regimen in which Cialis 20mg daily appears.

The distinction catches people out because 20mg and 5mg are the same drug in the same kind of tablet, so the gap between them feels like a matter of size. It is not. The licence attaches to the pattern as much as to the strength, and the two patterns were assessed separately, on separate evidence.

What Taking 20mg Cialis Every Day Actually Means

It means leaving the territory the regulator examined.

The daily studies were conducted at the daily strengths, so there is no published safety evidence describing 20mg Cialis daily as a regimen. Absence of evidence is not proof of harm, but it is not reassurance either, and it is not something to work out for yourself with a prescription only medicine.

There is a mechanistic concern behind the paperwork, too. Tadalafil lowers blood pressure and clears slowly, at a mean half-life of 17.5 hours. Repeating an as-needed strength every day therefore holds more drug in the body than the daily regimen was ever designed to produce. If you also take anything else that lowers blood pressure, alpha blockers for the prostate being the common example, that matters more, not less.

The Licensed Route to Daily Treatment

If what you actually want is treatment that is simply always there, that want is entirely reasonable and it already has a licensed answer. It is the daily route described on this page, supplied at EveryDayMeds at 2.5mg and 5mg, reaching a steady level within about 5 days.

You do not need a higher strength to get continuous cover. You need the regimen that was built for it, which is a smaller tablet taken every day, decided at consultation rather than assembled at home.

What the Daily Route Offers, and What It Does Not

What it offers. Once steady state arrives, the medicine is continuously present rather than introduced per occasion, so timing stops being a decision. It suits people already running a daily medicines routine. And the 5mg tablet carries that separate October 2012 licence for the signs and symptoms of benign prostatic hyperplasia, so where a prescriber judges it appropriate, one tablet may address two things.

What it does not offer. It is not a route to getting more medicine into you, and not automatically the more effective choice. It is a lower strength settling at a steady level instead of a peak. It also lives or dies on being taken: a skipped day counts for more on a regimen built around accumulation, so a daily tablet taken most days is not the regimen that was prescribed.

Switching Between the Two Routes

Moving from one licensed regimen to the other is a prescribing decision, not something arranged by ordering a different pack.

What the Process Involves

1. You complete an online consultation covering medical history, current medicines, blood pressure, heart health, and how the present regimen has been performing
2. A UK registered prescriber reviews it and decides whether the other route suits you, and at which strength
3. If approved, the pharmacy dispenses it
4. You take it exactly as directed, at the same time daily if you have moved onto the daily route
5. If it is not performing as expected after a fair run, you return to your prescriber rather than adjusting things yourself

On the daily route the medicine reaches steady state in about 5 days, though your prescriber may want a longer stretch before judging whether treatment is working adequately.

What Not to Do When Changing

Do not overlap the regimens, for the reason given above.

Do not retain the old strength as a backup. If the new route is not suiting you, that is a conversation to have, and a leftover pack in a drawer quietly converts it into a decision you have already taken alone.

Do not change anything without declaring everything you take. Nitrates, nitric oxide donors and riociguat are absolute bars on both routes at every strength. Alpha blockers for the prostate, including alfuzosin, doxazosin and tamsulosin, need assessing, since they and tadalafil both push blood pressure downwards.

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Side Effects and What the Trials Reported

The adverse effect profile attaches to tadalafil itself, not to a particular strength or route.

Frequently reported across this class: headache, flushing of the face, indigestion, and congestion in the nose and sinuses. Back pain, muscle aches and light-headedness also feature. Most sit in the mild-to-moderate band and many ease as the body adjusts.

Figures From a 12-Week Trial of the Daily Route

These come from a 12-week trial of tadalafil 5mg daily in 212 men with lower urinary tract symptoms. They describe that strength, that duration and that group, and they appear here because this page concerns the daily route.

Across that trial 30.7%, 65 of 212, reported one or more treatment-emergent adverse event, 5.7% discontinued because of one, and 0.5%, meaning a single participant, reported a serious adverse event.

Long Term Daily Use: How Far the Evidence Reaches

The longest published follow-up on daily tadalafil that NICE records runs to a year.

A 1-year extension study in 427 men taking 5mg daily found 57.6% reporting one or more treatment-emergent adverse event, most graded mild at 44% or moderate at 45%. Serious events appeared in 4.7%, two judged possibly treatment-related: a worsening of coronary heart disease, and an episode of global amnesia.

The share reporting something rose across a year relative to 12 weeks, which is what a longer observation window produces rather than evidence of the medicine becoming harder to tolerate. Discontinuation barely shifted, 5.2% over a year against 5.7% over 12 weeks, suggesting most of what got reported was not severe enough to stop for.

What the evidence does not reach is several years of continuous use, because no published study runs that long. Anyone quoting a confident figure for five or ten years has gone past what exists, which is why long term use gets reviewed periodically rather than settled once.

Does Tadalafil Stop Working Over Time?

There is no established recommendation to routinely increase tadalafil because of tolerance. Where treatment appears less effective over time, other explanations deserve consideration first, and a prescriber should review any persistent change in response before a dose is adjusted.

• The underlying condition can progress, altering what the medicine is being asked to do
• Blood pressure, blood sugar and cardiovascular health all affect response, and all move over time
• Medicines started since treatment began can interact
• Alcohol, tiredness and stress shape a given occasion without touching the drug
• Expectation shifts, and treatment that once felt remarkable can feel ordinary while performing identically

Taking more is not the answer to any of those. Treatment that has stopped working as it did is grounds for review, because the cause usually sits outside the tablet.

What Weight to Give Online Discussion Threads

Much of what circulates about dosing originates in anonymous forums. Posted accounts are not studies: no denominator, no verification, no record of what else the person was taking, no follow-up. Someone reporting that an unlicensed pattern suited them tells you nothing about safety, and neither does someone reporting the reverse.

The valuable part of those threads is the questions being asked, which is why several are answered here. The dosing advice is not.

Getting Assessed: What to Put in Front of a Prescriber

Both routes are prescription only, so the process runs identically whichever you are weighing up. An online consultation with UK registered prescribers at EveryDayMeds covers daily tadalafil at 2.5mg and 5mg, as-needed tadalafil at the higher strengths, and branded Cialis tablets.

Raise these specifically, because each can change the answer:

• Everything you take, pharmacy purchases and supplements included, with nitrates named first
• Any cardiac history, including stroke, angina, heart attack or heart failure, in specifics rather than summary
• Your blood pressure, and whether anything you take is meant to lower it
• Any prostate symptoms, or medication taken for them
• How often treatment is genuinely wanted, answered honestly, since that is what separates the two routes
• What you have already tried, and how it went

A prescriber can only assess what you actually tell them, and an incomplete answer about nitrates or a heart condition is the one thing on this page capable of causing real harm.

EveryDayMeds dispenses as a GPhC registered pharmacy, registration 9012878, trading as OVIO LTD. Nothing is supplied without clinical assessment first, and stock is genuine and UK sourced.

Stop and Get Help Straight Away If

• An erection persists beyond 4 hours. This needs emergency attention, not wait-and-see
• Vision goes suddenly in one or both eyes, or hearing drops away suddenly. Stop the tablet and get seen urgently
• Chest pain arrives during or after use. Treat as an emergency, and ensure whoever attends knows tadalafil is on board, because nitrates must then be withheld
• You black out or collapse

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