Tadalafil and Buspirone: Can They Be Taken Together?

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Tadalafil and Buspirone: Understanding the Interaction

Published: 18 October 2026

Many men wonder whether tadalafil and buspirone can be taken together safely. The good news is that no major interaction is commonly reported between tadalafil (a treatment for erectile dysfunction) and buspirone (an anti-anxiety medicine). However, every medicine you take—including over-the-counter products and supplements—must be declared during your consultation, so your prescriber or pharmacist can check for any individual risk factors and ensure the combination is appropriate for you.

What Is Tadalafil and How Does It Work?

Tadalafil is a prescription medicine licensed in the UK to treat erectile dysfunction (ED) in adult men. It belongs to a group of medicines called PDE5 inhibitors, which work by relaxing the blood vessels in the penis, allowing increased blood flow when you are sexually aroused [4]. Tadalafil does not cause an erection on its own—sexual stimulation is still needed.

Tadalafil is available in two forms: on-demand tablets (usually 10 mg or 20 mg, taken at least 30 minutes before sexual activity, with effects lasting up to 36 hours) and daily tablets (2.5 mg or 5 mg, taken once a day at the same time) [4]. The longer duration of action is why tadalafil is sometimes called the 'weekend pill'. It is the generic version of the branded medicine Cialis.

At Cured Pharmacy, tadalafil is available on prescription after an online consultation reviewed by a UK-registered prescriber. The prescriber will check your medical history, current medicines, and overall health to ensure tadalafil is safe and suitable for you.

What Is Buspirone and Why Is It Prescribed?

Buspirone is a prescription medicine used to treat anxiety disorders. Unlike benzodiazepines (such as diazepam), buspirone is not a sedative and does not cause dependence. It works by affecting serotonin and dopamine receptors in the brain, helping to reduce feelings of anxiety over time. Buspirone usually takes a few weeks to reach its full effect, so it is not used for immediate relief of anxiety symptoms.

Buspirone is typically taken two or three times a day, and it is important to take it consistently as prescribed. Common side effects include dizziness, headache, and nausea, especially when you first start treatment. Because buspirone can cause dizziness, it may add to the blood-pressure-lowering effect of some other medicines, including tadalafil.

If you have been prescribed buspirone for anxiety and are considering treatment for erectile dysfunction, it is essential to tell your prescriber about all your current medicines. Anxiety itself can contribute to ED, so treating the underlying anxiety may also help improve erectile function over time [1].

How Anxiety Can Affect Erectile Function

Anxiety and stress are common psychological causes of erectile dysfunction. Performance anxiety, relationship worries, and generalised anxiety disorder can all interfere with sexual arousal and the ability to achieve or maintain an erection [1]. Treating anxiety with medicines like buspirone, alongside psychological support such as counselling or cognitive behavioural therapy, can be an important part of managing ED. If you are experiencing both anxiety and erectile difficulties, speak to your GP, who can assess both conditions and recommend the most appropriate treatment plan.

Do Tadalafil and Buspirone Interact?

No major interaction between tadalafil and buspirone is commonly reported in the medical literature or the British National Formulary. This means that, for most men, taking these two medicines together does not pose a significant safety risk. However, both medicines can cause dizziness or a drop in blood pressure, so there is a theoretical possibility that taking them together might increase these effects.

Tadalafil works by relaxing blood vessels, which can lower blood pressure slightly. Buspirone can also cause dizziness, particularly when you first start taking it or if the dose is increased. If you experience dizziness, light-headedness, or fainting when taking tadalafil and buspirone together, you should sit or lie down until you feel better and contact your GP or pharmacist for advice.

It is important to remember that every person's medical history is different. Your prescriber will review all your current medicines, health conditions, and any other risk factors during your consultation to ensure that tadalafil is safe for you. Never start, stop, or change the dose of any prescribed medicine without speaking to a healthcare professional first.

What Your Prescriber Checks Before Prescribing Tadalafil and Buspirone

When you request tadalafil through Cured Pharmacy, a UK-registered prescriber will review your online consultation. They will check your current medicines (including buspirone), your medical history, and any conditions that might make tadalafil unsuitable. The prescriber will look for contraindications such as recent heart attack or stroke, unstable angina, severe heart failure, very low blood pressure, or the use of nitrate medicines (such as GTN spray or isosorbide mononitrate), nicorandil, riociguat, or recreational drugs known as 'poppers' [4].

If you are taking buspirone, the prescriber will consider whether you have any additional risk factors for low blood pressure or dizziness. They may recommend starting on a lower dose of tadalafil to minimise side effects. The prescriber will also check whether you are taking any other medicines that can interact with tadalafil, such as alpha-blockers (for prostate or blood pressure), potent CYP3A4 inhibitors (such as ritonavir, ketoconazole, or clarithromycin), or other blood-pressure medicines.

You must declare every medicine, supplement, and herbal product you are taking during your consultation. This includes over-the-counter medicines, vitamins, and St John's wort, which can reduce the effectiveness of tadalafil. Honest and complete information helps your prescriber make the safest decision for you.

Medicines That Must Not Be Taken with Tadalafil

Do not take tadalafil if you are using nitrates (GTN spray, isosorbide mononitrate or dinitrate), nicorandil, riociguat, or recreational drugs called 'poppers' (amyl or alkyl nitrites). The combination can cause a dangerous drop in blood pressure [4]. Do not take tadalafil with another PDE5 inhibitor (such as sildenafil, vardenafil, or avanafil) at the same time. If you are unsure whether any of your medicines fall into these categories, ask your GP or pharmacist before requesting tadalafil.

Practical Advice for Taking Tadalafil and Buspirone Together

If your prescriber confirms that tadalafil is suitable for you and you are already taking buspirone, there are some practical steps you can take to use both medicines safely. Take each medicine exactly as prescribed, at the times recommended by your doctor or pharmacist. Do not take more tadalafil than prescribed, and do not take it more often than once a day if you are using the on-demand tablets.

Be aware of the potential for dizziness, especially when you first start tadalafil or if your buspirone dose has recently changed. Avoid standing up quickly from a sitting or lying position, as this can make dizziness worse. Limit alcohol while taking tadalafil, as heavy drinking can worsen erectile dysfunction and increase the risk of low blood pressure and dizziness. Grapefruit juice can raise the level of tadalafil in your blood, so it is best to avoid it.

If you experience any new or worsening symptoms—such as severe dizziness, fainting, chest pain, or an erection lasting more than four hours—seek medical help immediately. Contact your GP or pharmacist if you have any questions or concerns about taking tadalafil and buspirone together. They can provide personalised advice based on your individual circumstances.

When to Seek Medical Advice About Tadalafil and Buspirone

You should speak to your GP if you are experiencing erectile dysfunction for the first time, as ED can be an early warning sign of underlying health conditions such as heart disease, diabetes, or high blood pressure [1]. Your GP can carry out tests to identify any underlying causes and recommend the most appropriate treatment. If you are already taking buspirone and are considering tadalafil, your GP can review your medicines and confirm whether the combination is suitable.

Contact your GP or pharmacist if you experience side effects from tadalafil that are troublesome or do not go away. Common side effects include headache, indigestion, back pain, muscle aches, flushing, and a blocked or runny nose [4]. These are usually mild and short-lived. However, if you develop sudden loss of vision or hearing, severe dizziness, or chest pain during sexual activity, stop taking tadalafil and seek urgent medical help.

If you are prescribed a new medicine while taking tadalafil and buspirone, always tell the prescriber that you are using both. Some medicines can interact with tadalafil, and your prescriber may need to adjust your dose or choose an alternative treatment. Never stop taking buspirone or any other prescribed medicine without speaking to your doctor first, as stopping suddenly can cause withdrawal symptoms or a return of your anxiety.

How Cured Pharmacy Can Help

Cured Pharmacy is a GPhC-registered online pharmacy (GPhC 9012511) offering convenient access to erectile dysfunction treatments through a secure online consultation. Every request is reviewed by a UK-registered prescriber, who will check your medical history and current medicines—including buspirone—to ensure tadalafil is safe for you. If approved, your medicine is dispensed by our qualified pharmacists and delivered discreetly to your door. You can contact our pharmacy team at any time if you have questions about your treatment or need further advice.

Scientific References

1. NHS. (n.d.). Erectile dysfunction (impotence). NHS website. https://www.nhs.uk/conditions/erection-problems-erectile-dysfunction/ [accessed 18 October 2026]
2. Joint Formulary Committee. (n.d.). Tadalafil. British National Formulary. NICE. https://bnf.nice.org.uk/drugs/tadalafil/ [accessed 18 October 2026]

Information on this page is for educational purposes only and is not medical advice. Prescription treatments require clinical assessment by a UK-registered prescriber. Always consult a qualified healthcare professional before starting or changing any medication.

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