Can you take viagra and cialis together?
Can you take Viagra and Cialis together? Usually no. Taking both can dangerously lower blood pressure. Only combine them if a clinician says so.
Key facts
- Answer a few health questions online. A licensed clinician reviews them. If approved, it ships to your door.
- Adults 18 or older. A licensed clinician reviews your health history and decides whether treatment is appropriate for you. Availability depends on the state you live in.
If you are asking “can you take viagra and cialis together,” the safest default is no. Viagra (sildenafil) and Cialis (tadalafil) are in the same drug class and can stack their blood pressure lowering effects, which can be dangerous. This is a common question when one medication does not seem to work as expected or timing is tricky. Vitals Vault can help you talk through options with a licensed clinician, including whether a different plan, timing, or evaluation for underlying causes makes more sense than combining medications.
- Usually no. Do not take Viagra and Cialis together unless a clinician specifically tells you to.
- Both are PDE5 inhibitors and can add up to dangerously low blood pressure.
- The risk is higher with nitrates, riociguat, heavy alcohol use, or some blood pressure medicines.
- If you have chest pain, fainting, or an erection lasting over 4 hours, get emergency care.
Can you take Viagra and Cialis together?
Why people ask
Most people consider combining them when one dose did not work, the timing felt off, or they want a stronger effect. Those situations are common, but they are usually better handled by adjusting the plan with a clinician rather than doubling up.
What “together” can mean
Because tadalafil can last longer in your body than sildenafil, “together” can include taking them on the same day or taking one while the other is still active. That overlap is why clinicians usually avoid combining them.
Safer next step
If you are not getting the effect you expected, a clinician can check for medication interactions, dosing plan issues, and health conditions that can make ED treatment less effective. They may recommend one medication, not both.
Why combining Cialis and Viagra can be risky
Additive blood pressure drop
Both sildenafil and tadalafil relax blood vessels by increasing cGMP signaling, which can lower blood pressure. Taking two PDE5 inhibitors can amplify this effect and raise the chance of dizziness, fainting, or other complications.
Nitrates are a hard stop
PDE5 inhibitors must not be used with nitrates (for example nitroglycerin) because the combination can cause severe hypotension (dangerously low blood pressure). This warning applies to both sildenafil and tadalafil.
Riociguat interaction
Both sildenafil and tadalafil are contraindicated with riociguat (a soluble guanylate cyclase stimulator) due to the risk of hypotension. If you take riociguat, do not use either medication unless your prescriber gives a different plan.
Alpha blockers and some BP meds
Some blood pressure medicines, especially alpha blockers used for prostate symptoms or hypertension, can increase the blood pressure lowering effect of PDE5 inhibitors. A clinician may still prescribe a PDE5 inhibitor, but typically with careful selection and monitoring rather than combining two.
Priapism and vision or hearing symptoms
All PDE5 inhibitors carry warnings about priapism (an erection lasting more than 4 hours) and sudden vision or hearing changes. Combining agents may increase side effect burden, and these symptoms require urgent evaluation.
| Topic | What the labels say | What it means for you |
|---|---|---|
| Drug class | Sildenafil and tadalafil are PDE5 inhibitors for erectile dysfunction. | Two drugs in the same class can stack effects and side effects. |
| Nitrates | Contraindicated with nitrates due to severe hypotension risk. | If you use nitrates, do not take either medication. |
| Riociguat | Contraindicated with riociguat due to hypotension risk. | Tell your clinician if you take riociguat. |
| Cardiac risk | Sexual activity has cardiovascular demands; labels advise evaluation in certain patients. | If you have heart symptoms or significant heart disease, get clinician guidance before ED meds. |
When to talk to a clinician urgently
Chest pain or fainting
If you develop chest pain, severe dizziness, or fainting after taking an ED medication, seek emergency care. Do not take nitrates on your own unless emergency clinicians instruct you, because nitrates can be dangerous with PDE5 inhibitors.
Erection over 4 hours
An erection lasting more than 4 hours (priapism) is a medical emergency because it can cause permanent injury. Get emergency care rather than waiting for it to resolve.
Sudden vision or hearing changes
Stop sexual activity and seek urgent medical evaluation if you notice sudden vision loss or sudden decrease or loss of hearing. These are rare but serious warnings on PDE5 inhibitor labels.
New or worsening heart symptoms
Erectile dysfunction can be associated with cardiovascular disease. If you have shortness of breath, chest pressure with exertion, or new exercise intolerance, talk with a clinician before trying to intensify ED treatment.
Practical tips if one is not working
Check for interacting meds
Bring a full medication list, including nitrates and alpha blockers.
Avoid heavy alcohol
Alcohol can worsen dizziness and lower blood pressure with PDE5 inhibitors.
Do not chase a dose
If it did not work, do not take extra pills without clinician guidance.
Ask about evaluation
ED can reflect vascular, hormonal, or medication related causes worth checking.
Discuss a single-med plan
A clinician can choose one option and adjust timing or dose safely.
Frequently Asked Questions
Can you take viagra and cialis together if one is not working?
Usually no, because combining PDE5 inhibitors can increase side effects and dangerously lower blood pressure. If one is not working, a clinician can review timing, interactions, and whether a different single medication plan is safer.
How long should you wait between Cialis and Viagra?
There is no universal safe waiting time to self-manage because tadalafil can remain active longer than sildenafil. If you think you have overlap or need a change, ask a clinician to set a plan based on your health and medications.
Is it dangerous to take Cialis and Viagra with nitrates?
Yes. Both sildenafil and tadalafil are contraindicated with nitrates because the combination can cause severe hypotension. If you use nitrates for chest pain, tell your prescriber before taking any ED medication.
Can you switch from Viagra to Cialis instead of combining them?
Many people switch between sildenafil and tadalafil, but the safest approach is to do it with clinician guidance to avoid overlap and interactions. Your clinician may also review whether other conditions or medications are affecting erections.
What should I do if I feel dizzy after taking an ED pill?
Sit or lie down and seek urgent care if symptoms are severe, you faint, or you have chest pain. Dizziness can be a sign of low blood pressure, which is more likely if you combine ED medicines or use them with interacting drugs.