Tadalafil 20 mg is a prescription medication that is a part of a drug class known as PDE5 inhibitors. It is typically prescribed to treat males suffering from erectile dysfunction (ED). In order for an individual to achieve an erection while taking tadalafil, sexual stimulation is required to increase blood flow to the penis.

In addition to treating ED, tadalafil is also used in other dosages in order to treat benign prostatic hyperplasia (BPH) and pulmonary arterial hypertension (PAH). The strength used to treat these other conditions depends on the condition of the patient and how they responded to the previous dosage.

What is tadalafil 20 mg used for?

Erectile Dysfunction (ED)

Tadalafil is an FDA approved drug for the treatment of ED. In order to treat ED on an as-needed basis, the maximum recommended dose is 20 mg.

Doses of tadalafil of 2.5 mg or 5 mg may be used in order to allow for more spontaneous sexual activity.

Benign Prostatic Hyperplasia (BPH)

Tadalafil 20 mg is also FDA approved for the treatment of BPH. The dose used to treat BPH is 5 mg and is prescribed once daily.

Using the drug in this dose may provide symptomatic improvement for the individual and may relax muscular tissue of the prostate and bladder.

Pulmonary Arterial Hypertension (PAH)

For the treatment of PAH, doses of tadalafil used are greater than the doses used to treat ED. The source states that the typical dose to treat PAH is 40 mg, taken as two 20 mg tablets once daily.

The dose used may be adjusted depending on the condition of the liver and/or kidneys.

Off-label use

Studies and physician practices have explored the use of tadalafil to treat Raynaud’s phenomenon and prevent high-altitude pulmonary edema.

These uses are not FDA-approved.

Tadalafil 20 mg vs. other doses

Each strength of tadalafil serves a different purpose.

Dose	Typical Use	Frequency	Details
2.5 mg	ED	Once daily	Starting dose for daily use
5 mg	ED, BPH, ED + BPH	Once daily	Standard daily dose
10 mg	ED	As needed	Typical starting dose for as-needed use
20 mg	ED, PAH	As needed (ED); once daily (PAH)	Maximum as-needed dose for ED; adjusted starting dose for PAH with kidney/liver impairment

For the treatment of ED, the recommended starting dose on an as needed basis is 10 mg. If the dose of 10 mg was not effective for the patient, then it is justified to use a dose of 20 mg.

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How long does tadalafil 20 mg last?

Generally, tadalafil is expected to provide its effectiveness for at least 30 minutes. Its effectiveness is expected to last for at least 36 hours; however, this does not mean the patient will have an erection for 36 hours. For an erection to occur, the patient will need to be sexually stimulated.

Tadalafil can be used with food. However, a large amount of alcohol can lower the patient’s blood pressure.

Side effects of tadalafil 20 mg

Tadalafil at 20 mg is expected to have more side effects compared to 5 mg.

Side effects of 20 mg of tadalafil can include:

Flushing
Indigestion
Nasal congestion
Headaches
Muscle pain

It is expected that the side effects will be more bothersome at higher doses.

Serious side effects, which are not common, may include vision or hearing changes, fainting, chest pain, changes in blood pressure, and prolonged or painful erections. The most serious side effect, a prolonged erection, is a medical emergency.

Tadalafil 20 mg vs 10 mg: What’s the difference?

10 mg and 20 mg can both be effective for treating ED, although 20 mg may produce increased effectiveness at the cost of increased side effects.

According to the source’s cited drug label data, 20 mg caused side effects such as headaches, indigestion, and back pain in 15%, 10%, and 6% of people, respectively, whereas these side effects were reported in 11%, 8%, and 5% of people taking 10 mg, respectively.

The cost, side effect profile, effectiveness, and tolerability of 20 mg should all be considered when deciding between the 20 mg and 10 mg tablets.

Who shouldn’t take 20 mg of tadalafil?

Tadalafil shouldn’t be taken by people with an allergy to tadalafil.

It can lower blood pressure dangerously, particularly when used with nitrates. It can also be used with other medications that stimulate the enzyme guanylate cyclase, called GC stimulators, such as riociguat, and may cause dangerous low blood pressure.

There are some situations where patients should use a lower tadalafil dose or should avoid the medication altogether. These situations include patients with cardiovascular disease or low blood pressure, recent heart attack or stroke, problems with the liver or kidneys, or pregnant women.

Tadalafil should not be used with other PDE5 inhibitors, such as sildenafil, unless a doctor prescribes it.

Is it safe to use tadalafil 20 mg?

The maximum recommended dose for treatment of erectile dysfunction (ED) as needed is tadalafil 20 mg. This dose can be prescribed by a healthcare professional for certain patients.

Using higher doses of the medication increases the risk of side effects. Other factors including other medications, and health conditions need to be considered as well.

Tadalafil 20 mg can be an appropriate dose for ED if lower doses are not effective. Because of the increased risk of side effects at higher doses, it is important to follow a healthcare professional’s instructions.

You need to go to the emergency department for conditions including an erection that lasts more than 4 hours, changes in vision or hearing, chest pain, and severe dizziness or fainting.

Expert Advise

Tadalafil 20 mg may be appropriate for those patients who have not obtained satisfactory relief with a lower dose.

There are increased risks with higher doses. These risks are also increased with the combined use of other medicines. Tadalafil 20 mg should not be taken without prescription.

It is important to seek immediate medical attention for any conditions that require an emergency, such as a painful erection that lasts for more than 4 hours, changes in hearing or vision, or chest pain.