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Both sildenafil and tadalafil work via the same mechanism to help you achieve and keep an erection. There are lots of things to consider if you’re comparing treatments such as dose, safety and duration of effects. "Our officers are dedicated to identifying and intercepting these types of shipments that could potentially harm our communities," said LaFonda Sutton-Burke, Director, Field Operation, Chicago Field Office. "Consumers do not realize the risk they are taking when using prescription drugs from other countries. These non-regulated drugs could cause health concerns or even death." Note that all prescriptions are at the discretion of your health care provider.

On very rare occasions ED treatment produces prolonged and painful erections, in a condition known as priapism. Priapism is a medical emergency with the potential on rare occasions for irreversible injury to the penis. If an erection lasts for more than 2 hours, medical attention should be sought immediately. Cialis (tadalafil) tablets to treat erectile dysfunction available to buy online in daily dose 2.5mg or 5mg strengths, and as required 10mg or 20mg strengths. Cialis (tadalafil) is a phosphodiesterase-5 (PDE5) inhibitor used to treat impotence (the inability to attain or maintain a penile erection) and benign prostatic hyperplasia (BPH).

Cialis, on the other hand, was developed a few years later for the sole purpose of treating erectile dysfunction, and was approved in 2003. Unlike Viagra, it can be taken daily or "as-needed" within 36 hours of sex. Viagra works for roughly four hours and must be taken 30 to 60 minutes before sex, according to the drug’s website.

Poor kidney function can increase Cialis levels in your body, increasing the risk of side effects. Avoid high fat foods or heavy meals before taking Cialis and before sexual activity. Fatty or heavy foods can affect how well Cialis works, as well as how long it takes to kick in. It can increase the level of medication in your blood, causing severe side effects.

Vardenafil (Levitra) is almost 10 times more biochemically potent than sildenafil, therefore a lower dose is needed to facilitate the penile erection, potentially resulting in less side effects. Selectivity is the ability of the drug to attach to the specific enzyme PDE 5 found in penile tissues. Vardenafil (Levitra) is more selective than sildenafil and tadalafil (Cialis) to PDE5, which again means a lower dose is needed with potentially less side effects. Tadalafil is very specific for PDE5 and is also very specific for the enzyme PDE11.

BPH is a condition in which the prostate gland gets larger but isn’t cancerous. BPH may cause problems with urination such as the need to urinate frequently or having to urinate more often at night. After ejaculation, you’ll likely lose your erection even if you’re taking Cialis. If you have an erection that lasts longer than 4 hours while using Cialis, see a doctor or go to the hospital right away. The prolonged erection should be treated as soon as possible so that it doesn’t cause lasting damage.

It most commonly affects men over 40 and becomes more common the older a man gets. However, data from The Journal of Sexual Medicine finds that over 25% of men under 40 also deal with ED. The one exception is grapefruit, which has substances that interfere with the body’s ability to eliminate tadalafil from the body. To lower the risk of side effects, avoid eating grapefruit or drinking grapefruit juice when taking Cialis.

Your doctor or pharmacist can provide more information about how Cialis and generic tadalafil compare. Cialis can cause certain side effects, some of which are more common than others. These side effects may be temporary, lasting a few days or weeks. But if the side effects last longer than that, bother you, or become severe, be sure to talk with your doctor or pharmacist. Cialis can be taken daily or as needed