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Cialis Together: What It Is, How It Works, and Whether It's Right for You

Cialis Together is the branded OTC version of tadalafil 10mg, lasting up to 36 hours. Here's how it works, what to expect, and how it compares to other options.

Written and medically reviewed by:

Callum Armstrong
Callum ArmstrongMPharm, Independent Prescriber (IP)
Last updated:
9 min read

Key Takeaways

Cialis Together is the branded OTC version of tadalafil 10mg, effective for up to 36 hours. Take one tablet 30 minutes before sex. Available online through GPhC-registered pharmacies after a free clinical consultation.

What is Cialis Together?#

Cialis Together is the branded, over-the-counter version of tadalafil 10mg. It contains the same active ingredient as prescription Cialis, but it's available without a traditional GP appointment. In the UK, you can buy it through regulated online pharmacies after completing a short clinical consultation.

It belongs to a class of medicines called PDE5 inhibitors, the same family as sildenafil (the active ingredient in Viagra). What sets tadalafil apart is its duration: a single dose can remain effective for up to 36 hours, which is why it's often called the "weekend pill." You take it, and for the next day and a half, you don't need to plan around it.

At Totiva, Cialis Together 10mg is available in packs of 4 (£14.99) or 8 (£24.99), and you complete a free consultation before any payment is taken. If the treatment isn't right for you, you pay nothing.

How Does Tadalafil Actually Work?#

When you're sexually aroused, your body releases nitric oxide in the penis. This triggers a chain reaction that produces a chemical called cGMP, which relaxes the smooth muscle in blood vessel walls and allows blood to flow in. More blood flow means a firmer erection.

The problem in erectile dysfunction is that an enzyme called PDE5 breaks down cGMP too quickly, disrupting this process before a satisfying erection can develop or be maintained. Tadalafil works by blocking PDE5, giving cGMP more time to do its job.

The result is improved blood flow to the erectile tissue during sexual stimulation. It's worth being clear: tadalafil doesn't cause erections on its own. Sexual arousal is still needed. What it does is make the body's natural response to arousal more reliable and sustained.

This mechanism is shared by all PDE5 inhibitors. What makes tadalafil distinctive is how long it stays active in the body. Its half-life is significantly longer than sildenafil, which is why effects can last up to 36 hours compared to sildenafil's 4 to 6 hours.

Taking Cialis Together: Dosage and Timing#

Cialis Together comes as a 10mg tablet. You take one tablet at least 30 minutes before sexual activity. Do not take more than one tablet in any 24-hour period.

Unlike some other ED tablets, food has relatively little effect on tadalafil's absorption. You can take it with or without a meal, which adds to its convenience.

One important note: grapefruit and grapefruit juice can interfere with how your liver processes tadalafil, potentially increasing the concentration of the drug in your blood. It's best to avoid grapefruit for a few hours before taking it.

10mg vs 20mg: What's the Difference?#

Cialis Together (the branded OTC version) comes in 10mg. Prescription tadalafil is also available at 20mg for cases where 10mg doesn't provide sufficient effect. If you try 10mg and find it partially effective but not quite enough, a clinician can assess whether a higher dose is appropriate.

For reference, prescription as-needed tadalafil is available at Totiva in both 10mg and 20mg, with the 20mg option costing from £8.49 for four tablets. If you're unsure which strength suits you, the online consultation will help clarify this based on your health history.

There's also a third option: daily low-dose tadalafil (2.5mg or 5mg). This is taken every day rather than on demand, keeping a steady level of tadalafil in the system. It suits men who want total spontaneity without thinking about timing at all. You can read more about all of these on Totiva's ED treatments page.

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Cialis Together vs Generic Tadalafil vs Sildenafil#

This is probably the question most men have when they start looking into ED treatment, and it's worth addressing directly rather than sending you elsewhere to find the answer.

Cialis Together vs generic tadalafil: These contain the same active ingredient at the same dose (10mg). The difference is branding and price. Generic as-needed tadalafil 10mg at Totiva starts from £7.49 for four tablets, compared to £14.99 for four tablets of Cialis Together. Both work identically, because they're pharmacologically identical. Some men prefer the reassurance of a familiar branded product; others are happy with the generic and value the savings.

Tadalafil vs sildenafil: Both are PDE5 inhibitors and both are effective, but they differ in duration and timing. Sildenafil works faster (typically 30 to 60 minutes) but the window of effectiveness is shorter, usually 4 to 6 hours. Tadalafil takes a similar 30 minutes to start working but lasts up to 36 hours. If spontaneity matters to you, tadalafil has the advantage. If you want something shorter-acting that's out of your system faster, sildenafil may suit you better.

Sildenafil is also more cost-effective. Generic sildenafil 50mg starts from £4.99 for four tablets at Totiva. Viagra Connect (the branded OTC version) starts at £11.99 for four tablets.

There's no single "best" option. It depends on lifestyle, how often you want to use it, whether you prefer spontaneity or can plan ahead, and how your body responds to each medicine.

Is It Available on the NHS?#

This is a very common question that most online pharmacy pages don't bother answering, so here's a straight answer.

Tadalafil can be prescribed on the NHS for erectile dysfunction, but access isn't straightforward. NHS prescribing for ED was significantly restricted in the 1990s, and while regulations have evolved, many GP practices still apply local formulary restrictions. In practice, NHS prescriptions for ED are usually reserved for men with specific underlying conditions such as diabetes, multiple sclerosis, Parkinson's disease, or those who have had prostate surgery or spinal cord injury.

For men with ED that isn't linked to a listed condition, getting tadalafil on the NHS often means a long wait for a GP appointment, a referral to urology, and no guarantee of a prescription at the end of it. An NHS prescription item costs £9.90 per item under the standard charge, but many men find the access barriers make this route less practical than it sounds.

Private online prescribing through a GPhC-registered pharmacy offers a faster, equally safe alternative. Totiva's consultation is free, clinician-assessed, and you only pay if a treatment is approved for you. For many men, this is a more realistic route to getting treatment quickly.

Safety: Who Shouldn't Take Cialis Together?#

Tadalafil is safe and well-tolerated for most men with erectile dysfunction, but there are important contraindications to be aware of.

Do not take tadalafil if you:

  • Take nitrate medications for heart conditions (such as glyceryl trinitrate, isosorbide mononitrate, or isosorbide dinitrate). Combining tadalafil with nitrates can cause a dangerous drop in blood pressure.
  • Take alpha-blocker medications (commonly prescribed for an enlarged prostate or high blood pressure), as these can also interact with tadalafil.
  • Have been told to avoid sexual activity for cardiac reasons.
  • Have severe liver or kidney impairment.
  • Have had a recent stroke or heart attack.
  • Have very low blood pressure (hypotension) or uncontrolled high blood pressure.

This is why an online consultation matters. It's not a formality. A clinician reviews your health history and current medications before approving any treatment, which is exactly how it should work. Totiva's pharmacist-led consultation process covers all of these safety checks before anything is dispensed.

What About Blood Pressure Medications?#

Many men taking antihypertensives wonder whether they can also take tadalafil. The answer is: sometimes yes, but it depends on which medication and what dose. Some antihypertensives interact more than others. Alpha-blockers (such as doxazosin and tamsulosin) carry the most significant interaction risk. Calcium channel blockers and ACE inhibitors are generally considered lower risk, but this should always be assessed individually. This is another reason why the consultation step is genuinely important rather than just box-ticking.

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Side Effects#

Like all medicines, tadalafil can cause side effects. Most are mild and temporary. The most commonly reported ones are:

  • Headache
  • Flushing (feeling warm or redness in the face)
  • Indigestion or upset stomach
  • Nasal congestion or runny nose
  • Back pain or muscle aches
  • Dizziness

Back and muscle pain is more commonly associated with tadalafil than with sildenafil, and it typically appears 12 to 24 hours after taking the tablet. It usually resolves on its own within a couple of days.

A prolonged erection lasting more than four hours (priapism) is rare but serious. If this happens, seek emergency medical attention immediately.

If any side effects are persistent or troubling, speak to a pharmacist or clinician.

Alcohol and Cialis Together#

Moderate alcohol consumption is unlikely to significantly affect how tadalafil works. However, heavy drinking is a different matter. Both alcohol and tadalafil can lower blood pressure, and together they can amplify this effect, leading to dizziness, lightheadedness, or fainting. Alcohol is also a common contributor to erectile difficulties in its own right, so drinking heavily before relying on tadalafil to work is counterproductive for more than one reason.

A couple of drinks with dinner before using Cialis Together is generally fine for most men. A night of heavy drinking is not the ideal combination.

What to Expect in the First Week#

Many men notice a good response from their first dose. Some find that tadalafil works better after two or three uses as the body adjusts. If the first attempt doesn't go as expected, it's worth trying again under less pressured circumstances before concluding the medication isn't working for you.

Anxiety about performance is itself a significant driver of ED, and sometimes just knowing you've taken a tablet can reduce that anxiety enough to make a difference. At other times, the anxiety can override the medication's effects entirely. If you're finding this a persistent issue, it may be worth discussing psychological support alongside medical treatment.

If after a few attempts there's genuinely no improvement, speak to a clinician about whether the dose needs adjusting or whether a different treatment would suit you better.

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Ordering Safely Online#

Buying any prescription or pharmacy medicine online safely means checking that the pharmacy is GPhC-registered. The GPhC register is publicly searchable on the GPhC website. Totiva is registered with the GPhC (registration number 9012997) and operates under UK law, which means all medicines are sourced through regulated UK supply chains and dispensed by qualified pharmacists.

Be cautious of websites that don't ask any health questions, don't require a consultation, or sell tadalafil at prices that seem implausibly low. These are red flags for illegitimate supply.

Cialis Together is a pharmacy medicine, meaning it can be sold without a GP prescription but must go through a registered pharmacy with an appropriate clinical check. Totiva's free online consultation covers this requirement, and you only pay for treatment after a pharmacist has reviewed and approved your order.

If you'd like to explore your options, Totiva's ED consultation takes just a few minutes and there's no charge unless a treatment is approved for you.

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Medical Information: This article is for informational purposes only and does not constitute medical advice. Always consult a qualified healthcare professional before starting, stopping, or changing any treatment.

Written by

Callum Armstrong

Callum Armstrong

MPharm Independent Prescriber (IP)

Superintendent Pharmacist & Independent Prescriber

Callum Armstrong is a GPhC-registered pharmacist and independent prescriber with over 8 years of clinical experience. Specialising in weight management, hair loss, erectile dysfunction, and dermatology, he combines clinical expertise with a background in digital health and pharmacy software to deliver evidence-based, patient-centred care. As Superintendent Pharmacist at Totiva Health, Callum oversees the clinical governance and quality standards that underpin every service.

Credentials:MPharmIndependent Prescriber (IP)Weight LossHair LossErectile DysfunctionDermatologyDigital Health & Pharmacy Software

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