Please note: a valid prescription is required for all prescription medication.
Cialis® is the brand name for tadalafil, a PDE5 inhibitor for erectile dysfunction and urinary symptoms from an enlarged prostate. This page explains how it works, who it suits, and how to use it safely, with US delivery from Canada. Many patients compare Canadian pricing for potential savings without insurance.
CanadianInsulin is a prescription referral service. We verify your prescription with your clinic, and licensed Canadian pharmacies dispense your order.
What Cialis® Is and How It Works
Cialis® contains tadalafil, a phosphodiesterase type 5 (PDE5) inhibitor. It increases blood flow to the penis by enhancing nitric oxide effects. It helps achieve and maintain an erection with sexual stimulation. It can also relax smooth muscle in the prostate and bladder. That action can improve lower urinary tract symptoms in benign prostatic hyperplasia.
For erectile dysfunction, tadalafil reduces PDE5 activity in penile tissue. Cyclic GMP persists longer, helping smooth muscle relax and arteries dilate. For BPH, relaxation of smooth muscle may ease urine flow and reduce urgency. Cialis works only with sexual stimulation for ED. It does not cure ED or increase libido.
US delivery from Canada is available after prescription verification. Orders ship discreetly from licensed Canadian pharmacies.
Who Cialis® Is For
Cialis is approved for adult men with erectile dysfunction. It is also approved for adult men with signs and symptoms of benign prostatic hyperplasia. A daily dose can treat both ED and BPH in eligible patients.
People with certain conditions should avoid Cialis. It must not be used with nitrates or nitric oxide donors. It is not for women or children. Caution is advised in severe heart disease, recent stroke or heart attack, uncontrolled blood pressure, or severe liver or kidney problems. Discuss personal risks with a clinician before starting therapy.
Learn more about Erectile Dysfunction and Benign Prostatic Hyperplasia. For treatment options by category, see Enlarged Prostate.
Dosage and Usage
Tadalafil dosing follows two approaches: as needed or once daily. Do not exceed one dose per day. Always follow the prescribed regimen.
- As-needed dosing for ED: Start at 10 mg before sexual activity. Take at least 30 minutes before expected activity. The dose may be adjusted to 5 mg or 20 mg based on response and tolerability. Do not take more than once daily.
- Once-daily dosing for ED: Typical dose is 2.5 mg to 5 mg at the same time each day. Daily dosing may suit those with frequent sexual activity.
- Once-daily dosing for BPH (with or without ED): 5 mg daily at about the same time each day.
Food does not meaningfully affect tadalafil tablets. Sexual stimulation is required for erectile response. If unsure about the plan, review the official label or ask a clinician. Dose adjustments may be needed in kidney or liver impairment. Concomitant medications may require a lower starting dose.
Strengths and Forms
Cialis tablets are commonly available in these strengths:
- 2.5 mg
- 5 mg
- 10 mg
- 20 mg
Packaging and strengths can vary by manufacturer and market. Availability may vary based on pharmacy supply.
Missed Dose and Timing
As-needed dosing has no set schedule, so a missed dose does not apply. For once-daily dosing, take the missed tablet when remembered, unless it is close to the next dose. Do not double doses to make up for a missed tablet. Keep doses about 24 hours apart.
Storage and Travel Basics
Store tablets at room temperature in the original container. Keep them dry and away from excessive heat or moisture. For travel, carry medicine in a hand luggage compartment. Keep a copy of the prescription when crossing borders. If needed, use prompt shipping to replenish while away. Do not use tablets past the labeled expiration date.
Pen Handling and Sharps Disposal
Not applicable. Cialis tablets are taken by mouth. No pen or sharps handling is required.
Benefits
Cialis offers flexible dosing. As-needed dosing supports planned intimacy. Once-daily dosing supports spontaneity without timing a dose before sexual activity. For BPH, the daily regimen can ease urinary symptoms while also treating ED.
Compared to some alternatives, tadalafil has a longer half-life. Effects may last up to 36 hours in many users. That window can allow more flexibility around sexual activity. Individual results vary.
Men with both ED and BPH may simplify therapy using one daily medicine. This may reduce pill burden. It may also avoid separate timing for different conditions.
Side Effects and Safety
- Headache
- Flushing
- Indigestion or heartburn
- Back or muscle pain
- Nasal congestion
- Dizziness
Most effects are mild to moderate and short-lived. Back pain and muscle aches can appear later after dosing. They usually resolve within a couple of days.
Serious risks are uncommon but require urgent care. These include chest pain, severe dizziness or fainting, a painful erection lasting more than four hours, sudden vision loss, or sudden hearing loss with ringing or dizziness. Priapism requires immediate treatment to prevent lasting damage. Stop sexual activity if chest pain occurs and seek help.
Patients with diabetes and cardiovascular disease should discuss risks and benefits with a clinician. Background conditions may affect sexual activity safety. For context on metabolic health and sexual function, see Uncovering The Link.
Drug Interactions and Cautions
- Nitrates or nitric oxide donors: Contraindicated due to severe blood pressure lowering.
- Riociguat: Avoid combined use.
- Alpha-blockers: Use caution, especially when starting or changing doses.
- Antihypertensives: Additive blood pressure effects may occur.
- Strong CYP3A4 inhibitors: May raise tadalafil levels. Examples include ketoconazole, itraconazole, ritonavir, and clarithromycin.
- Strong CYP3A4 inducers: May lower tadalafil exposure. Examples include rifampin and carbamazepine.
- Excess alcohol: Can increase dizziness and hypotension risk.
- Grapefruit: May increase drug levels in some cases.
Preexisting heart disease requires careful assessment before resuming sexual activity. Kidney or liver impairment may require dose limits or avoidance. Review the complete label for full interaction and contraindication details. For a broader look at sexual health in diabetes, see How Does Diabetes.
What to Expect Over Time
With as-needed use, some men notice benefits with the first dose. Others may require a few tries with dose adjustments. With once-daily dosing, erectile function can improve over days to weeks. BPH urinary symptoms may respond over a similar timeframe. The pattern varies by individual, dose, and coexisting conditions.
Consistency matters for daily dosing. Take the tablet at the same time each day. Report bothersome side effects or inadequate response to a clinician for guidance. Do not change the dose without medical advice.
Compare With Alternatives
Several PDE5 inhibitors are available. Some have shorter onset or duration profiles. Two common alternatives include:
- Viagra® (sildenafil) is an as-needed option with a shorter duration window.
- Tamsulosin Cr is not an ED drug, but it treats urinary symptoms of BPH. It may be used when ED treatment is not needed.
Therapy choice can depend on desired timing, duration, tolerability, and comorbidities. Clinicians can help match a regimen to individual goals and risks.
Pricing and Access
Explore Canadian pricing and compare the cost of Cialis tablets. Orders are processed with US delivery from Canada after prescription verification. Many patients review price differences and potential savings before choosing dose and supply.
To check price and availability, start the order and select strength and quantity. Add the prescription and preferred pharmacy fulfillment. Checkout uses encrypted transmission for security. Discreet packaging is standard.
Availability and Substitutions
Availability can vary by strength and manufacturer. If a selected strength is temporarily unavailable, a prescriber may recommend a comparable alternative dose or a different PDE5 inhibitor. Generic tadalafil products exist in many markets. The dispensing pharmacy can substitute a therapeutically equivalent product when permitted by the prescriber and local laws.
Patient Suitability and Cost Saving Tips
Cialis may suit adult men seeking flexible timing or daily coverage. It should be avoided with nitrates, riociguat, severe hypotension, or recent major cardiovascular events. Careful evaluation is needed in significant kidney or liver impairment.
- Discuss once-daily vs as-needed dosing based on activity patterns.
- Consider multi-month supplies to reduce per-tablet costs.
- Align refills with clinic appointments to avoid gaps.
- Use the same pharmacy to streamline prior verification.
- Ask about generic tadalafil when appropriate for additional savings.
Questions to Ask Your Clinician
- Is daily tadalafil or as-needed dosing a better fit?
- What signs mean the dose is too high or too low?
- Are current medicines safe to combine with tadalafil?
- How should alcohol intake be limited while on therapy?
- What heart checks are needed before starting treatment?
- If urinary symptoms persist, should therapy be adjusted?
- When should treatment be stopped or changed?
Authoritative Sources
Closing
Start a secure order with US delivery from Canada and select the needed strength. This content is for general information and does not replace the advice of a licensed clinician.
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How long does Cialis last?
Tadalafil has a long half-life. Many men experience effects for up to 36 hours. Duration varies by dose, metabolism, and other factors.
How quickly does Cialis start working?
As-needed doses can work in about 30 minutes. Some men respond sooner, while others may need more time or a dose adjustment.
Can Cialis be taken with food or alcohol?
Food does not significantly affect tablets. Limit excessive alcohol, as it can increase dizziness or drop blood pressure.
Is daily Cialis different from as-needed dosing?
Yes. Daily dosing aims for steady blood levels and spontaneity. As-needed dosing targets a single sexual activity window.
Can Cialis treat urinary symptoms from BPH?
Yes. The 5 mg daily dose is approved to improve BPH-related urinary symptoms, with or without ED.
Who should not use Cialis?
Do not use with any nitrate or with riociguat. Avoid after recent heart attack or stroke, severe hypotension, or when advised by a clinician.
Can orders ship to the US from Canada?
Yes. US delivery from Canada is available after prescription verification. Orders are dispensed by licensed Canadian pharmacies.
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