Prescription ED medication guide

ED medications available by prescription in Canada

The best-known prescription tablets for erectile dysfunction are PDE5 inhibitors. Sildenafil and tadalafil belong to this category, but their timing, duration, interactions and dosing schedules are not identical.

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The direct answer

Sildenafil and tadalafil are prescription PDE5 inhibitors used for erectile dysfunction. Neither produces an automatic erection, and neither is safe for everyone. The product and dose must follow a prescriber’s decision and pharmacy directions.

What PDE5 inhibitors do

These medicines support the normal blood-flow response associated with sexual stimulation. They do not replace arousal and they do not diagnose the reason erectile difficulty is happening.

Why the medication list matters

Nitrates and recreational poppers can interact dangerously with PDE5 inhibitors. Some blood-pressure, prostate, antifungal and HIV medicines can also change risk or dosing, which is why a complete medication list is required.

Sildenafil and tadalafil are different choices

Sildenafil is commonly discussed as an as-needed option. Tadalafil has a longer duration and may be prescribed on different schedules. Duration does not mean a continuous erection; it describes the period in which the medicine may support a response.

The pharmacy identifies what you receive

Generic appearance varies by manufacturer. Use the dispensing label—not tablet colour or an online photograph—to confirm the product, strength and directions.

Help for erection difficulties

How sildenafil and tadalafil help with ED

Sildenafil and tadalafil help blood vessels relax, improving blood flow during sexual stimulation. That can make it easier to get and keep an erection firm enough for sex.

Trouble getting an erection?

Wanting sex but struggling to get firm enough can be a sign of ED. Find out how prescription treatment may help.

Difficulty getting an erection

Losing your erection during sex?

ED can also mean getting an erection but not keeping it. Learn about losing firmness and when medication may be an option.

Difficulty keeping an erection

Worrying about losing your erection?

Pressure to perform can make erection difficulties worse. Medication may help the erection response, but anxiety may also need separate support.

Performance anxiety and ED

Sexual stimulation is still needed. These medicines do not increase desire and are not suitable for everyone; a prescription is required.

Medical references

Canadian Urological Association guideline: Erectile dysfunctionCanadian Urological Association

Ask BigBoyMD

Common questions, clear answers.

Can I select my own dose?+

No. You can discuss preferences, but the prescriber determines whether a medicine and dose are appropriate.

Will ED medication increase sexual desire?+

PDE5 inhibitors act on the erection response; they are not a treatment for low desire. Tell the clinician if desire has also changed.

Why do generic tablets look different?+

Different licensed manufacturers may use different shapes, colours, coatings and inactive ingredients. The pharmacy label identifies the dispensed product.

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