Daily Cialis: How Long It Takes to Work and What to Do If You Miss a Dose

Daily Cialis is a low dose version of tadalafil, taken every day rather than before sex. It usually reaches a steady level in your blood after around 5 days of once-daily dosing, and most men notice a clear effect from about day 3 onwards. Missing one dose isn't a big deal. You simply carry on with your next scheduled tablet the following day.

Daily dose versus as-needed dose#

Cialis, and generic tadalafil, comes in two very different forms. The as-needed version is 10mg or 20mg, taken 30 minutes to 2 hours before sex, and works for up to 36 hours. The daily version is 2.5mg or 5mg, a much smaller dose designed to sit in your system all the time.

Because the daily dose is so much lower, it isn't meant to give a single strong peak. Instead, it keeps a low, steady level of tadalafil in your blood so you're ready whenever you need to be, without planning sex around a tablet.

The timeline: what to expect and when#

Tadalafil has a mean half-life of around 17.5 hours in healthy adults. That's the time it takes for the amount in your blood to drop by half. In older men or those with reduced kidney function, this half-life can be considerably longer — up to around 35 hours — meaning the drug stays in the body for longer. With daily dosing, it takes about 5 half-lives for levels to settle into a steady state, which the tadalafil SPC indicates takes approximately 5 days of once-daily dosing.

So if you start daily tadalafil this week, don't judge it after 2 days. Give it until around day 5, and ideally a full week, before deciding whether it's working for you.

What can change this timeline#

A few things speed up or slow down how tadalafil builds up and clears from your body.

• Kidney function. Your kidneys clear tadalafil from your blood. Reduced kidney function means the drug stays around longer, so lower doses or less frequent dosing may be needed.
• Liver function. Your liver breaks tadalafil down. Liver problems can change how quickly this happens.
• Age. Men over 65 often clear tadalafil a little more slowly, though this rarely changes the dose much on its own.
• Other medicines. Certain drugs, including some antifungals and HIV medicines, slow down the enzyme that breaks tadalafil down. This can raise blood levels and increase side effects.
• Missed or irregular doses. Daily dosing only works as intended if you actually take it daily. Skipping days on and off means you never really reach a steady level.

If you miss a dose#

Don't double up. If you forget your tablet one day, just take the next one at your usual time. One missed dose won't undo your steady state completely, since tadalafil clears slowly. Two or three missed days in a row is more likely to bring levels down and reduce the effect.

If you want to stop daily dosing altogether and switch to as-needed use, you don't need to taper off. You simply stop the daily tablet and take your as-needed dose an hour or two before sex instead.

Who shouldn't take daily Cialis#

Tadalafil is not safe for everyone. The clearest and most serious rule is around nitrates. This includes GTN tablets and sprays used for angina, GTN patches, isosorbide mononitrate or dinitrate, amyl nitrite (sometimes called poppers), and riociguat (used to treat pulmonary hypertension). Taking tadalafil with any of these can cause a severe, and potentially fatal, drop in blood pressure. This combination should never be used.

Severe kidney impairment requires particular care. For daily dosing of tadalafil 2.5mg or 5mg, use is not recommended where creatinine clearance falls below 30 mL/min. Even moderate kidney impairment (creatinine clearance 31–50 mL/min) already requires caution and is generally limited to a maximum dose of 5mg. Your prescriber will assess your kidney function and advise accordingly.

Severe liver impairment is also a concern. Daily dosing is not recommended here, because there isn't enough safety data in this group.

Other situations that need caution include a recent heart attack or stroke, uncontrolled low or high blood pressure, and use of certain alpha-blockers for prostate symptoms. Alpha-blockers in particular can interact with tadalafil to cause a significant drop in blood pressure (symptomatic hypotension), and not all combinations have been studied — only tamsulosin 0.4mg has combination data with tadalafil. These situations do not automatically rule out daily Cialis, but they do change your dose and how closely you're monitored. This is exactly why a proper consultation matters before you start.

Daily Cialis and an enlarged prostate#

Tadalafil 5mg is also licensed in the UK to treat lower urinary tract symptoms caused by an enlarged prostate (BPH), alongside ED. If you have both conditions, one daily tablet can address them together. How much it helps your specific urinary symptoms is something your prescriber should talk through with you, since this varies between men.

How much does daily Cialis cost?#

Cost is one of the most common questions men have — and it's genuinely good news. Generic tadalafil is significantly cheaper than branded Cialis, and daily dosing in particular is very affordable.

Here's a breakdown of Totiva's prices:

Daily tadalafil

As-needed tadalafil

Whatever route you choose, only use a GPhC-registered pharmacy. Legitimate UK online services will always ask health questions and have a prescriber review your answers before dispensing anything.

The NHS can prescribe tadalafil for ED, but only in specific situations — including conditions like diabetes, prostate cancer treatment, and spinal cord injury. Outside these, ED treatment is prescribed privately. Generic tadalafil through a regulated online service like Totiva is typically the most cost-effective private option available.

If you're weighing up daily versus as-needed tadalafil, a proper consultation with a UK-registered clinician is the quickest way to get a dose and plan that actually fits your health and your sex life.