Get Hard or Your Money Back. Start free online visit or check for symptoms

Can I Take 40mg of Cialis?

Kristin Hall, FNP

Medically reviewed by Kristin Hall, FNP

Written by Our Editorial Team

Last updated 5/23/2021

There’s really no mincing words about this, but erectile dysfunction medications are not a joke, and they’re certainly not a breath mint. 

We see questions all the time from men wondering if they can take more, should take more, should take medications more frequently, or should double their dosage. 

Erectile dysfunction medications aren’t instant erection pills — it doesn’t work like that. And it can't be overstated enough that drugs like Cialis® (generic tadalafil) should be taken at the dosage prescribed by your healthcare provider. 

It’ll become apparent why you can’t go chomping on these things like candy later, but right now let’s take a moment to briefly explain ED and how erections work.

Erections and Erectile Dysfunction

First, a few words about your penis. When it’s working correctly, erections are the result of two primary processes activated by arousal. 

The first of the two primary processes: increased blood flow to the blood vessels of the penis; the second: the blood becoming trapped in the corpora cavernosa (two large storage chambers that make your penis look full and hard). 

Essentially, when you get turned on, your brain sends signals to your body to send extra blood to the penis, and to lock that blood up so it can fill your erection. 

When something goes wrong, you have erectile dysfunction

The National Institutes of Health (NIH) defines the condition of erectile dysfunction as a  “condition in which you are unable to get or keep an erection firm enough for satisfactory sexual intercourse.” 

Many factors can contribute to erectile dysfunction—obesity, illicit or prescribed drug use, stress, anxiety, poor diet, blood flow issues and hormone imbalances are just a few of the potential causes.

A Look At ED Medication

It’s a condition that affects an estimated 30 million to 50 million men nationwide. And because of how common it is, there are effective treatments, including Cialis and Viagra. 

Cialis and Viagra have a lot in common. For the moment, we’re going to focus on Cialis, but you can read more extensively in our guide on cialis vs viagra

Cialis is a phosphodiesterase type 5 (PDE5) inhibitor, which blocks the breakdown of compounds in your body that interfere with blood vessel dilation and blood flow to the soft tissue of your penis. 

Because of how they work, PDE5 inhibitors are often used to treat certain types of  hypertension.

The big difference between Cialis and other ed drugs is that it can be taken once-daily, rather than a certain amount of time before sex is planned. That gives you more freedom to be spontaneous.

This is important to note: tadalafil doesn't give you arousal, or erections—they merely create the ideal conditions for them to happen. You still have to do the work of getting excited.

In many ways, they could be considered miracle drugs, but they’re not without side effects—ones that, as you might have guessed, are compounded when you take twice the recommended dosage.

buy cialis online

genuine cialis has your back all weekend

Cialis Side Effects

Cialis carries with it certain side effect risks, including blurred vision, diarrhea, flushing, nausea, indigestion, cough, stomach pain, ringing in the ears, dizziness, chest pain, hives, rash, difficulty breathing or swallowing, headaches, blistering or swelling of the face. These side effects of Cialis can be minor or serious.

Some people may even have their vision altered or lost (if you’re experiencing this, seek medical care immediately).

There’s also the blood pressure question. Because the medicines affect blood flow, it’s important to talk to your healthcare provider about tadalafil or Cialis before taking them, especially if you have blood pressure conditions or are currently on medication for high blood pressure.  

Can You Take 40mg of Cialis?

As for taking a double dose (40mg), well, bad ideas abound. 

Remember how we mentioned Cialis doesn’t give you an erection? Well, taking a second one isn’t going to change how the drug fundamentally works. 

What it will do is double the risk of mild and serious side effects like the ones we mentioned. You don’t want a doubled risk of diarrhea, let alone blindness. 

And overdoing on PDE5 inhibitors can lead to even more serious consequences, like death.

Worse yet, taking double doses can increase the likelihood of experiencing a condition called priapism — an erection that lasts for several hours.

It can be painful, it will require medical attention and it may cause permanent damage. Of course, that’s not to say that priapism isn’t a side effect at the regular dosage. 

sildenafil online

get hard or your money back

Taking 40mg of Cialis: Not a Good Idea

Take this as a little heart to heart. If you’re considering double dosing on prescription medications like Cialis, you might be in bigger trouble than you know. 

For starters, more of the ed medication isn’t going to solve the problem and DIY dosages are, as we explained, very dangerous. 

But the bigger issue here is that making executive decisions about these things can be life threateningly dangerous—which is why you should speak to a healthcare provider about anything like this before doing it. 

We’ve already explained the dangers of double doses, but the bigger picture is that you need to have a healthy line of communication with your providers about what is and isn’t working. 

They’ll be able to help you find the right solutions, tweak treatments, and get you back in the game—without dangerous side effects. 

If you’ve been prescribed pills that aren’t working, it may be time to look at other causes of ED, which can include psychological or lifestyle influences. Again, a healthcare provider can help you with this.

If you’re just here learning about ED medications, we can help with that too. Check out our resources to determine if either tadalafil (Cialis) or sildenafil (Viagra) are right for you. 

6 Sources

This article is for informational purposes only and does not constitute medical advice. The information contained herein is not a substitute for and should never be relied upon for professional medical advice. Always talk to your doctor about the risks and benefits of any treatment.

📫 Get updates from hims

Insider tips, early access and more.