Daily Support vs. On-Demand Erectile Dysfunction Care: Which One Is For Me?

Choosing the right erectile dysfunction (ED) treatment for you is important. Some ED medications are made to be taken when you need them, right before you plan to have sex. Others can be taken once daily and build up in your body, giving you more flexibility for spontaneous moments.

There are some common branded medications known to help with sexual performance such as sildenafil and tadalafil (also known by the brand names Viagra and Cialis), which work in slightly different ways to support ED. In this article, our experts explore the main differences between daily support vs on-demand erectile dysfunction care, and how to know which treatment is right for you.

Article Summary:

• Sildenafil and tadalafil are both used as treatments for erectile dysfunction and work by increasing blood flow to the penis when you’re sexually aroused.
• Tadalafil comes in two doses, one for daily support and another for on-demand response. Sildenafil is usually taken before sex as on-demand treatment.
• Choosing the right ED treatment depends on several factors including your health and medical history, how much flexibility you want, how often you have sex and personal preference.

What is erectile dysfunction?

Erectile dysfunction or ED refers to ongoing difficulty with either getting or keeping an erection that’s firm enough for penetrative sex. [1] Experiences with ED can become more common as you age and could be linked to underlying health conditions. If it continues to happen more often than not, a healthcare professional can help you to find out which treatment options are available. [2]

What causes erectile dysfunction?

For an erection to happen, your brain responds to sexual thoughts, touch or other stimulation and then sends signals to your penis to increase blood flow and create firmness. And because an erection involves both physical and psychological body processes, it’s difficult to directly tie ED to one cause.

The cause of ED can depend on a number of factors, from stress levels and hormones to lifestyle behaviors like smoking, or conditions like diabetes. [1]

Some common causes of ED include:

• Drinking too much alcohol
• Side effects from other medications
• Cardiovascular disease
• High cholesterol
• High blood pressure
• Being overweight

Psychological causes such as depression or feeling anxious before sex may also affect performance and make keeping an erection more difficult. [1] That’s where ED treatments could support you and help target the factors that could be getting in your way.

How do erectile dysfunction treatments work?

Sildenafil and tadalafil belong to a group of medications called phosphodiesterase type 5 inhibitors, or PDE5 inhibitors. When you’re feeling sexually aroused, these PDE5 inhibitors prompt the muscles around your penis to relax. This leads to an increased blood flow to your penis and a firmer erection.

Remember, ED treatments can’t support an erection without you being sexually aroused first. PDE5 inhibitors don’t affect your sex drive, only the physical aspect of erectile dysfunction. [3]

What‘s the difference between daily and on-demand ED treatments?

The main difference is when you take your medicine. Daily ED treatments are usually taken around the same time every day, and may be more suitable if you want more flexibility around sex or have sex quite often. This is because their lower daily dose of ED treatment provides a continuous level of active ingredient in your body, unlike on-demand treatments, which can last up to 36 hours.

On-demand ED treatment should be taken shortly before you expect to have sex. They contain a higher dose, so they reach full effect more quickly. You might prefer this type of treatment if taking medication every day doesn’t suit your lifestyle or if you don’t have sex that often. [4]

Before recommending prescriptions for ED medication, your clinician will take factors such as your sexual health, any medical conditions, and lifestyle habits into consideration to help you find the treatment that’s most suitable for you.

Tadalafil vs sildenafil: what’s the difference?

Tadalafil (Cialis) and sildenafil (Viagra) are common ED treatments a healthcare professional might recommend, but they work slightly differently.

Tadalafil comes in two forms: daily dose support and on-demand tablets. Tadalafil Daily is a low-dose tablet taken once a day, to help you get an erection whenever you experience sexual stimulation. On-demand doses of tadalafil have the same effect, but they stay active in the body for longer and help you get erections for up to 36 hours, so you don't need to take them every day. [5]

Sildenafil, however, only provides on-demand support. It’s recommended to take sildenafil an hour before you plan to have sex, as it's effective from 30 minutes for up to 4 hours. You shouldn’t take sildenafil more than once a day. [6]

What are chewable ED treatments?

Chewable ED treatments may be an ideal choice if you have difficulty swallowing tablets whole. Some people might also prefer chewables because they’re more discreet than traditional oral medication and offer flavoured alternatives. [7] Most importantly, licensed chewable ED treatments are designed with the same active ingredients as traditional capsules, so they work in the same way.

How to choose the right ED treatment?

There’s no single ‘best’ treatment for ED and that’s why it’s important to prioritize what works for you and your lifestyle. When deciding between daily support vs on-demand ED care, here are a few things to consider:

How often do you have sex?

If you have sex regularly, daily dose support may allow more room for flexibility and mean you don’t have to plan as much. However, if you don’t have sex often and are happy to plan ahead, on-demand ED care might suit you better.

Do you take other medication?

Most ED treatments can affect other drugs. For example, sildenafil and tadalafil shouldn’t be taken if you're using nitrate medications, which are often prescribed for chest pain or high blood pressure. Combining tadalafil with nitrates can cause a dangerous drop in blood pressure. [8] This is just one example, and you should always let your prescribing clinician know if you’re taking any other medications during your consultation.

Do you have underlying health conditions?

Your heart (or cardiovascular) health is an important factor to take into consideration before opting to take ED treatments. Sexual activity may put strain on your heart, which could be risky if you have certain heart conditions. Talk to your healthcare provider before taking tadalafil or sildenafil if you have heart disease or any other concerns related to any other underlying health conditions. [8]

What are the common side effects of ED medication?

Like any medication, taking sildenafil and tadalafil can result in side effects. [9] Common side effects may include:

• Headaches
• Indigestion
• Feeling flushed or warm
• Nasal congestion
• Back pain
• Muscle aches

At MedExpress, we offer online consultations with regular clinical check-ins, and a range of erectile dysfunction medications. Speak with our experts to find out which treatment is suitable for you.

References

1. Definition & Facts for Erectile Dysfunction | NIDDK [Internet]. National Institute of Diabetes and Digestive and Kidney Diseases. 2017 [cited 2026 Sept 16]. Available from: https://www.niddk.nih.gov/health-information/urologic-diseases/erectile-dysfunction/definition-facts
2. Domes T, Najafabadi BT, Roberts M, Campbell J, Flannigan R, Bach P, et al. Canadian Urological Association guideline: Erectile dysfunction. Canadian Urological Association Journal. 2021 Aug 17;15(10). Available from: https://pmc.ncbi.nlm.nih.gov/articles/PMC8525522/
3. Mills TM. Vasoconstriction and vasodilation in erectile physiology. Current Urology Reports. 2002 Nov;3(6):477–83. Available from: https://pubmed.ncbi.nlm.nih.gov/12425871/
4. Gagal S, Sidana AK, Agrawal A, Singh S. Comparative efficacy of on-demand sildenafil, tadalafil and daily tadalafil for treatment of erectile dysfunction: a 12-week randomized controlled study. Indian J Psychiatry. 2025;67(12):1136-44. Available from: https://pmc.ncbi.nlm.nih.gov/articles/PMC12774316/
5. Consumer Information for: TADALAFIL - Drug and Health Products Portal [Internet]. Hpfb-dgpsa.ca. 2017 [cited 2026 Sept 23]. Available from: https://dhpp.hpfb-dgpsa.ca/dhpp/resource/94217/consumer-information
6. Government of Canada, Health Canada, Health Products and Food Branch. Drug Details - Drug and Health Product Register [Internet]. Hres.ca. 2020 [cited 2026 Sept 23]. Available from: https://hpr-rps.hres.ca/details.php?drugproductid=4928
7. Adepu S, Ramakrishna S. Controlled Drug Delivery Systems: Current Status and Future Directions. Molecules [Internet]. 2021 Sep 29;26(19):5905. Available from: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8512302/
8. Government of Canada, Health Canada, Health Products and Food Branch. Drug Details - Drug and Health Product Register [Internet]. Hres.ca. 2016 [cited 2026 Sept 24]. Available from: https://hpr-rps.hres.ca/details.php?drugproductid=2744&query=
9. McMurray JG, Feldman RA, Auerbach SM, DeRiesthal H, Wilson N, On. Long-term safety and effectiveness of sildenafil citrate in men with erectile dysfunction. Therapeutics and Clinical Risk Management [Internet]. 2007 Dec [cited 2026 Sept 17];3(6):975. Available from: https://pmc.ncbi.nlm.nih.gov/articles/PMC2387281/