Sildenafil and Ticagrelor: Can They Be Taken Together?

Takes less than 2 minutes to complete 100% online

Choose your treatment

Select from our recommended UK-licensed medications.

Answer quick questions

Select safe UK treatments. Quick answers.

Get it delivered fast

We will deliver direct to you as quickly as tomorrow.

Key takeaways

• There is no major direct interaction between sildenafil and ticagrelor
• Your prescriber must confirm your heart is healthy enough for sexual activity
• Never take sildenafil with nitrates, nicorandil, riociguat or poppers
• Continue taking ticagrelor as prescribed—do not stop without medical advice
• Report dizziness, chest pain or prolonged erection to a doctor immediately

What Is Sildenafil and How Does It Work?

Sildenafil is the active ingredient in Viagra and is licensed in the UK to treat erectile dysfunction (ED) in men [3]. 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. Sildenafil does not cause an erection on its own—sexual stimulation is still needed.

Sildenafil is available in 25mg, 50mg and 100mg tablets. The usual starting dose is 50mg, taken about one hour before sexual activity, with a maximum of one dose per day [3]. The medicine can help men achieve and maintain an erection sufficient for sexual intercourse when taken as directed. At Cured Pharmacy, sildenafil is available only after an online consultation reviewed by a UK-registered prescriber, who will check your medical history and current medicines to ensure it is safe and suitable for you.

What Is Ticagrelor and Why Is It Prescribed?

Ticagrelor is an antiplatelet medicine that helps prevent blood clots from forming. It is commonly prescribed alongside aspirin for people who have had a heart attack, unstable angina, or certain heart procedures such as coronary stenting. Ticagrelor works by blocking a specific receptor on platelets (the blood cells involved in clotting), making them less likely to stick together and form dangerous clots in the arteries.

Because ticagrelor is prescribed for serious heart conditions, it is important that your prescriber knows you are taking it before approving any new medicine, including sildenafil. The presence of ticagrelor on your medication list tells the prescriber that you have underlying cardiovascular disease, which requires careful assessment before starting treatment for erectile dysfunction. Your heart health, not the ticagrelor itself, is the main consideration when deciding whether sildenafil is safe for you.

Why Heart Health Matters for ED Treatment

Erectile dysfunction can be an early warning sign of cardiovascular disease, and many men with heart conditions also experience ED [1][2]. If you have been prescribed ticagrelor, it means you have a heart condition that needs ongoing management. Sexual activity itself places demands on the heart, so your prescriber must ensure that your heart is healthy enough for sex before approving sildenafil or any other ED treatment. This assessment is a standard part of the online consultation at Cured Pharmacy and is designed to keep you safe.

At a glance

Do Sildenafil and Ticagrelor Interact?

There is no major direct drug interaction between sildenafil and ticagrelor reported in standard UK prescribing references [3]. This means that ticagrelor does not significantly alter the way sildenafil works in your body, and sildenafil does not interfere with ticagrelor's antiplatelet effect. The two medicines can usually be taken together, provided your prescriber has assessed your overall heart health and confirmed that sexual activity is safe for you.

However, both medicines can have effects on your cardiovascular system. Sildenafil can cause a small drop in blood pressure, which is usually mild and well tolerated, but may cause dizziness or light-headedness in some men [3]. If you are also taking other blood-pressure-lowering medicines (which is common in people with heart disease), this effect may be more noticeable. Your prescriber will review all your current medications during the consultation to ensure the combination is safe and to recommend the most appropriate starting dose of sildenafil.

What Your Prescriber Checks Before Approving Sildenafil and Ticagrelor Together

When you request sildenafil treatment and you are taking ticagrelor, the prescriber will ask detailed questions about your heart condition and overall health. They will want to know when you had your heart attack or procedure, whether you have any ongoing chest pain (angina), and how well you can manage physical activity. This helps them decide whether your heart is stable enough for the physical demands of sexual activity.

The prescriber will also check for any medicines that must not be taken with sildenafil. These include nitrates (such as GTN spray, isosorbide mononitrate or dinitrate), nicorandil, riociguat, and amyl or alkyl nitrites (poppers). If you are taking any of these medicines, do not take sildenafil, as the combination can cause a dangerous drop in blood pressure [3]. Ticagrelor is not on this list, so it does not automatically rule out sildenafil treatment.

Alpha-Blockers and Other Blood Pressure Medicines

Many men with heart disease also take medicines to lower blood pressure or manage prostate symptoms, such as alpha-blockers (for example, doxazosin or tamsulosin). These can add to the blood-pressure-lowering effect of sildenafil, increasing the risk of dizziness or fainting [3]. If you take an alpha-blocker, your prescriber will usually recommend starting sildenafil at the lowest dose (25mg) and ensuring you are stable on the alpha-blocker before beginning ED treatment. Always declare every medicine you take during your consultation, including over-the-counter and herbal products.

Practical Advice for Taking Sildenafil and Ticagrelor Safely

If your prescriber approves sildenafil while you are taking ticagrelor, follow their instructions carefully. Take sildenafil about one hour before you plan to have sex, and do not take more than one dose in 24 hours [3]. Avoid heavy meals and excessive alcohol before taking sildenafil, as both can reduce its effectiveness and increase the risk of side effects such as dizziness or headache.

Be aware of how you feel when you first start treatment. If you experience dizziness, light-headedness, or any chest discomfort during or after sexual activity, stop and seek medical advice. These symptoms may indicate that your blood pressure has dropped too much or that your heart is under strain. It is also important to continue taking ticagrelor and any other heart medicines exactly as prescribed by your doctor—do not stop or change any medicine without medical advice, as this could increase your risk of a heart attack or stroke.

If you develop an erection that lasts longer than four hours (priapism), sudden loss of vision or hearing, or chest pain during sex, seek urgent medical help immediately. These are rare but serious side effects that require prompt treatment [3].

Alternatives to Sildenafil for Men Taking Ticagrelor

If sildenafil is not suitable for you, or if you prefer a different option, other PDE5 inhibitors are available. Tadalafil (Cialis) can be taken on-demand (10mg or 20mg at least 30 minutes before sex, with effects lasting up to 36 hours) or as a daily low dose (2.5mg or 5mg), which may suit men who want to be ready for sex at any time without planning ahead [4]. Vardenafil (Levitra) and avanafil (Spedra) are also licensed for ED and work in a similar way to sildenafil [5][6].

All PDE5 inhibitors have similar considerations when used alongside ticagrelor: there is no major direct interaction, but your heart health must be assessed before treatment. The same contraindications apply (no nitrates, nicorandil, riociguat or poppers), and the same caution is needed if you take other blood-pressure medicines [4][5][6]. Your prescriber will help you choose the most suitable option based on your preferences, lifestyle and medical history. At Cured Pharmacy, all ED treatments require an online consultation reviewed by a UK-registered prescriber.

When to See Your GP

If you are experiencing erectile dysfunction for the first time, or if your symptoms have recently worsened, it is important to see your GP for a full assessment [1][2]. ED can be an early sign of cardiovascular disease, diabetes or other health conditions that need investigation and treatment. Your GP can arrange blood tests, review your medications, and refer you to a specialist if needed. Once any underlying causes have been addressed, you can then consider ED treatment through a service like Cured Pharmacy if appropriate.

When to get urgent help

• Erection lasting longer than 4 hours (priapism)—go to A&E immediately
• Sudden loss of vision or hearing—seek urgent medical attention
• Chest pain during or after sexual activity—stop and call 999
• Severe dizziness or fainting after taking sildenafil—seek same-day medical advice

Call 999 or go to A&E in an emergency, or contact NHS 111 for urgent advice.