Tadalafil vs Sildenafil

This is a decision you and your doctor will make. For this medicine, the following should be considered: Tell your doctor if you have ever had any unusual or allergic reaction to this medicine or any other medicines.

Brand/Source	Price per Tablet	Package Size	Cost per Pack	Notes
Brand A	$3.00	30 tablets	$90.00	Trademarked, pharmacy purchase
Generic B	$0.50	60 tablets	$30.00	FDA-approved generic
Online Supplier C	$0.20	90 tablets	$18.00	Bulk purchase, check authenticity
Local Pharmacy D	$1.00	20 tablets	$20.00	Over-the-counter available

Also tell your health care professional if you have any other types of allergies, such as to foods, dyes, preservatives, or animals. For non-prescription products, read the label or package ingredients carefully.

• Sildenafil 10mg can cause dizziness or vision changes in some users.
• Always check for drug interactions before taking sildenafil.
• It is important to stay hydrated when using sildenafil.
• The medication is not effective as an aphrodisiac without stimulation.
• Seek emergency help if you experience chest pain after use.

Appropriate studies have not been performed on the relationship of age to the effects of sildenafil in children younger than 1 year of age.

Dosage	Recommended Use	Onset of Action	Duration of Effect	Typical Frequency
10 mg	Mild to moderate ED cases	30-60 minutes	Up to 4-6 hours	Once per day, as needed
20 mg	Moderate to severe ED	30-60 minutes	Up to 4-6 hours	Once per day, as needed
5 mg	For elderly or sensitive users	30-60 minutes	Up to 4 hours	Once per day, as needed

Safety and efficacy have not been established.

Advice To Patients

[1]Advise patients to seek prompt medical attention in the event of sudden decrease or loss of hearing while taking sildenafil. [1] These events may be accompanied by tinnitus and dizziness. [1]Advise patients to seek prompt medical attention for an erection that lasts more than 4 hours. [1] If it is not treated right away, priapism can permanently damage the penis. [1]Inform patients taking sildenafil for erectile dysfunction that the drug offers no protection against sexually transmitted diseases and patients should use necessary protective measures to guard against such diseases, including the human immunodeficiency virus (HIV).

Less common

[1]Instruct the patient to seek medical attention immediately if they take too much sildenafil. [1]Inform patients of the risk of symptomatic low blood pressure (e.g., dizziness, lightheadedness, fainting). [1] Monitor blood pressure when administering sildenafil in combination with blood pressure lowering drugs (e.g., α-adrenergic blocking agents). [1]Advise patients to take sildenafil with or without food 1 hour or, if needed, 30 minutes to 4 hours before sexual activity. [1] Inform patients that taking sildenafil with a high-fat meal may cause delayed onset.

Already Own This Product?

[1]Advise patient to inform their clinician of existing or contemplated concomitant therapy, including prescription and OTC drugs and dietary or herbal supplements, as well as any concomitant illnesses. [1]Inform patients of other important precautionary information. Excipients in commercially available drug preparations may have clinically important effects in some individuals; consult specific product labeling for details. Please refer to the ASHP Drug Shortages Resource Center for information on shortages of one or more of these preparations. \* available from one or more manufacturer, distributor, and/or repackager by generic (nonproprietary) name © Copyright, 1959-2026, Selected Revisions April 10, 2024. Sildenafil should never be used in children for erectile dysfunction. In general, sildenafil should not be used for pulmonary arterial hypertension in children, especially for chronic use. Use of sildenafil oral film is not indicated for use in the pediatric population. Appropriate studies performed to date have not demonstrated geriatric-specific problems that would limit the usefulness of sildenafil in the elderly.

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Viagra Generic	150mg	120 + 8 Pills	177.58€ 169.12€	Buy
Viagra Generic	100mg	180 + 8 Pills	199.37€ 189.88€	Buy
Viagra Generic	150mg	270 + 10 Pills	326.61€ 311.06€	Buy
Kamagra	100mg	84 + 6 Pills	264.44€ 251.85€	Buy
Kamagra Polo	100mg	272 + 12 Pills	622.94€ 593.28€	Buy
Kamagra Oral Jelly	100mg	220 + 18 Sachets	662.24€ 630.70€	Buy
Viagra Generic	25mg	360 + 10 Pills	213.68€ 203.50€	Buy
Kamagra Polo	100mg	20 Pills	83.56€ 79.58€	Buy
Viagra Generic	25mg	20 Pills	37.74€ 35.94€	Buy
Kamagra Polo	100mg	84 + 4 Pills	244.49€ 232.85€	Buy
Viagra Generic	150mg	60 + 4 Pills	111.25€ 105.95€	Buy

However, elderly patients are more likely to have age-related liver, kidney, or heart problems, which may require caution and an adjustment in the dose for patients receiving sildenafil. There are no adequate studies in women for determining infant risk when using this medication during breastfeeding.

• The medication can be part of a treatment plan for ED.
• Do not share sildenafil with others, even if they have similar symptoms.
• Taking sildenafil on an empty stomach may increase effectiveness.
• Be aware of possible allergic reactions, such as rash.
• Follow-up with your healthcare provider regularly when using sildenafil.

Weigh the potential benefits against the potential risks before taking this medication while breastfeeding. Although certain medicines should not be used together at all, in other cases two different medicines may be used together even if an interaction might occur. In these cases, your doctor may want to change the dose, or other precautions may be necessary.

5.3 Epistaxis

[1][67] Such concentrations are unlikely to cause any effects in sexual partners exposed to the semen. [67] Plasma sildenafil concentrations appear to decline in a biphasic manner following oral administration, with a terminal elimination half-life of about 4 hours (range: 3-5 hours). [1][4][67][91][116][127][130][131] Sildenafil is metabolized principally via hepatic cytochrome P-450 (CYP) microsomal isoenzymes 3A4 (major route) and 2C9 (minor route). [1][26][67][91][131] Plasma concentrations of the active N-desmethyl metabolite are approximately 40% of those observed with sildenafil, and the metabolite reportedly accounts for about 20% of sildenafil's pharmacologic activity. [1][67][131] The N-demethylated metabolite, the major circulating metabolite, has a phosphodiesterase selectivity profile similar to that of sildenafil and an in vitro potency for PDE type 5 of approximately 50% of the parent drug.

What happens if I take too much sildenafil?

[1][116][131] Sildenafil is eliminated mainly in the feces as metabolites following oral administration. [1][67][91][116][131] In healthy adults and those with ED, approximately 80% of an oral dose is excreted as metabolites in feces and 13% is excreted in urine. Importance of instructing patients to read the manufacturer's patient information before starting sildenafil therapy and each time their prescription is refilled. [1]Instruct patients to avoid contraindicated medications such as regular and/or intermittent use of organic nitrates, organic nitrites (e.g., ''poppers''), and riociguat. [1]Inform patients that sildenafil is marketed for erectile dysfunction (Viagra) and pulmonary arterial hypertension (Revatio®).

Professional resources

[1] Advise patients taking Viagra® not to take Revatio® or other PDE type 5 inhibitors. [1]Advise patients of the potential for sildenafil to augment the blood pressure lowering effect of α-adrenergic blocking agents (e.g., doxazosin) and anti-hypertensive medications (e.g., amlodipine) and concomitant administration may lead to symptomatic hypotension in some patients. [1]Inform patients taking sildenafil for erectile dysfunction and with potential for cardiac risk of sexual activity (e.g., patients with preexisting cardiovascular risk factors) to refrain from further activity and seek medical attention immediately if they experience symptoms (e.g., chest pain, dizziness, nausea) upon initiation of sexual activity. [1]Advise patients to seek immediate medical attention for a sudden loss of vision in one or both eyes while taking sildenafil. [1] Such an event may be a sign of non-arteritic anterior ischemic optic neuropathy (NAION), a cause of decreased vision including possible permanent loss of vision. When you are taking this medicine, it is especially important that your healthcare professional know if you are taking any of the medicines listed below.

6.1 Clinical Trials Experience

When a man is sexually stimulated, his body's normal response is to increase blood flow to his penis to produce an erection. By controlling the enzyme, sildenafil helps to maintain an erection after the penis is stroked. Without physical action to the penis, such as that occurring during sexual intercourse, sildenafil will not work to cause an erection. Sildenafil is also used in both men and women to treat the symptoms of pulmonary arterial hypertension. This is a type of high blood pressure that occurs between the heart and the lungs.

Advantages Over Taking Both Pills Separately

When hypertension occurs in the lungs, the heart must work harder to pump enough blood through the lungs. Sildenafil works on the PDE5 enzyme in the lungs to relax the blood vessels. This will increase the supply of blood to the lungs and reduce the workload of the heart. This medicine is available only with your doctor's prescription. This product is available in the following dosage forms: In deciding to use a medicine, the risks of taking the medicine must be weighed against the good it will do. The following interactions have been selected on the basis of their potential significance and are not necessarily all-inclusive.

5.1 Hypotension

American Society of Health-System Pharmacists®, 4500 East-West Highway, Suite 900, Bethesda, Maryland 20814. The American Society of Health-System Pharmacists, Inc. represents that the database provided hereunder as formulated with a reasonable standard of care, and in conformity with professional standards in the field. The American Society of Health-System Pharmacists, Inc. makes no representations or warranties, express or implied, including, but not limited to, any implied warranty or merchantability and/or fitness for a particular purpose, with respect to such database and specifically disclaims all such warranties and representations.

ED Prescriptions for $1-2 Per Pill

Users are advised that decisions regarding drug therapy are complex medical decisions requiring the independent, informed decision of an appropriate health care professional, and the database if provided for informational purposes only. The entire monograph for a drug should be reviewed for a throrough understanding of the drug's actions, uses and side effects. The American Society of Health-System Pharmacists, Inc. does not endorse or recommend the use of any drug in the database. The information contained in the database is not a substitute for medical care or treatment by a licensed health care provider.

What are the serious side effects of sildenafil?

A PDE5 inhibitor (IC50s = 3.6 and 3 nM for PDE5 activity in isolated rabbit platelets and human corpus cavernosum, respectively); selective for PDE5 over PDE1 and PDE3 (IC50s = 0.26 and 65 μM, respectively); reverses glucose-induced decreases in ANG1 expression and reduction of capillary-like tube formation by mouse dermal endothelial cells in vitro; increases the number of functional blood vessels and regional blood flow in the sciatic nerve in a db/db mouse model of diabetic peripheral neuropathy; increases ICP/MAP ratio in castrated rats at 20 mg/kg per day; reduces cardiac arrest and resuscitation-induced increases in angiotensin II ACE, ACE2, and various angiotensin receptors and increases survival in a porcine model of ischemia/reperfusion injury Sildenafil is used to treat erectile dysfunction (also called sexual impotence). Sildenafil belongs to a group of medicines called phosphodiesterase 5 (PDE5) inhibitors. These medicines prevent an enzyme called phosphodiesterase type-5 from working too quickly. The penis is one of the areas where 20mg sildenafil this enzyme works. Erectile dysfunction is a condition where the penis does not harden and expand when a man is sexually excited, or when he cannot keep an erection.