PDE5 inhibitors block PDE5, an enzyme in the walls of blood vessels. Blocking PDE5 causes blood vessels to relax, increasing blood flow to certain areas of the body.

Don’t rely solely on OTC Sildenafil for erectile difficulties; consult a doctor.
Some OTC Sildenafil products are obtained from unregulated sources online.
Use caution with OTC Sildenafil to avoid counterfeit or contaminated products.
Be aware of possible legal risks associated with purchasing OTC Sildenafil.
OTC Sildenafil might not be suitable for men with cardiovascular issues.
Using OTC Sildenafil without guidance can lead to serious health problems.
OTC Sildenafil drugs often claim to be "safe" without scientific backing.
Verify ingredients and sources when considering OTC Sildenafil options.
OTC Sildenafil may cause unexpected drug interactions with other medications.
It’s safer to seek medical advice rather than self-medicating with OTC Sildenafil.
Some OTC Sildenafil products may be illegal in certain jurisdictions.

This effect means that they can help manage conditions such as ED and pulmonary hypertension.

Brand names

People taking nitrate medication should not take PDE5 inhibitors because the combination of drugs can cause a dangerous drop in blood pressure, which can be life-threatening.

Product	Dosage	Quantity + Bonus	Price
Viagra Generic	150mg	10 Pills	36.73€ 34.98€
Viagra Generic	25mg	180 + 6 Pills	154.93€ 147.55€
Viagra Generic	200mg	120 + 8 Pills	204.80€ 195.05€
Viagra Generic	25mg	30 + 4 Pills	47.97€ 45.69€
Kamagra Soft Tabs	100mg	180 + 8 Pills	425.45€ 405.19€
Viagra Generic	25mg	120 + 6 Pills	125.56€ 119.58€
Viagra Generic	50mg	90 + 6 Pills	107.37€ 102.26€
Viagra Generic	150mg	20 Pills	55.02€ 52.40€
Kamagra Polo	100mg	180 + 8 Pills	446.52€ 425.26€
Kamagra	100mg	84 + 6 Pills	264.44€ 251.85€
Viagra Generic	50mg	10 Pills	26.87€ 25.59€
Kamagra Polo	100mg	12 Pills	60.21€ 57.34€
Kamagra	100mg	180 + 6 Pills	436.79€ 415.99€
Viagra Generic	25mg	10 Pills	25.19€ 23.99€

Other drugs, foods, supplements, or herbal remedies may contain PDE5 inhibitors.

What should I know about storage and disposal of this medication?

PDE5 inhibitors block PDE5, an enzyme in the walls of blood vessels. Blocking PDE5 causes blood vessels to relax, increasing blood flow to certain areas of the body. This effect means that they can help manage conditions such as ED and pulmonary hypertension. People taking nitrate medication should not take PDE5 inhibitors because the combination of drugs can cause a dangerous drop in blood pressure, which can be life-threatening. Other drugs, foods, supplements, or herbal remedies may contain PDE5 inhibitors.

Cialis Professional

These may not have FDA regulations and could contain unlisted ingredients or contaminants, or interact with other medications. People should discuss any potential side effects or drug interactions of PDE5 inhibitors with their doctor before taking these medications. Sildenafil citrate is a generic prescription drug that widens arteries. Most people recognize it as pfizer sildenafil 100 Viagra, a treatment for erectile dysfunction. Healthcare professionals also use a lower-dose version to treat high arterial blood pressure in the lungs. These may not have FDA regulations and could contain unlisted ingredients or contaminants, or interact with other medications. People should discuss any potential side effects or drug interactions of PDE5 inhibitors with their doctor before taking these medications. Sildenafil citrate is a generic prescription drug that widens arteries. Most people recognize it as pfizer sildenafil 100 Viagra, a treatment for erectile dysfunction. Healthcare professionals also use a lower-dose version to treat high arterial blood pressure in the lungs. The dosage form and dosing schedule will depend on the condition being treated.

Country	OTC Availability	Regulations/Restrictions	Notes
USA	Some products	FDA regulations, claims must be substantiated	Limited to specific formulations
UK	Allowed in pharmacies	MHRA regulations, age restrictions	Mix of OTC and behind-the-counter
Australia	Restricted	TGA approvals needed, pharmacy sales	Limited brands, professional advice
Canada	Available	Health Canada approval, OTC or behind-the-counter	Varies by province

Treats erectile dysfunction or pulmonary arterial hypertension. Antihypertensive, phosphodiesterase type 5 inhibitor (PDE-5 inhibitor) Antihypertensive, phosphodiesterase type 5 inhibitor (PDE-5 inhibitor) Sildenafil treats erectile dysfunction or pulmonary hypertension (high blood pressure in the arteries to the lungs). Tablet 20 mg (for pulmonary hypertension) 25 mg 50 mg 100 mg Oral suspension 10 mg/mL (pulmonary hypertension) Injection 10 mg/12.5 mL (pulmonary hypertension) 10 mg/12.5 mL (pulmonary hypertension) 10 mg/12.5 mL (pulmonary hypertension) For erectile dysfunction: 25–100 mg tablet taken only once daily at least one hour before sexual activity For erectile dysfunction: 25–100 mg tablet taken only once daily at least one hour before sexual activity For pulmonary hypertension: In adults and children 45 lbs or heavier: 20–80 mg taken orally three times daily OR 10 mg intravenous injection three times daily In children weighing less than 44 lbs: 10 mg three times daily In adults and children 45 lbs or heavier: 20–80 mg taken orally three times daily OR 10 mg intravenous injection three times daily In adults and children 45 lbs or heavier: 20–80 mg taken orally three times daily OR 10 mg intravenous injection three times daily In children weighing less than 44 lbs: 10 mg three times daily In children weighing less than 44 lbs: 10 mg three times daily Sildenafil Citrate12.5ml of 10mg/12.5ml vial Your doctor will tell you how much sildenafil to take and how often it can be taken.

The legality of OTC Sildenafil varies by jurisdiction; some countries ban sales.
Many OTC Sildenafil products are marketed as "natural" or "herbal" remedies.
Consumers should be wary of false advertising claims on OTC Sildenafil labels.
Some OTC Sildenafil products come in online "complimentary" health packages.
OTC Sildenafil may be marketed as an alternative when prescription is difficult.
There is a rise in OTC Sildenafil products targeting men over 40.
OTC Sildenafil popularity has increased due to ease of availability online.
Prices for OTC Sildenafil vary widely depending on branding and source.
Some OTC Sildenafil products are capsules, powders, or dissolvable tablets.
OTC Sildenafil use might mask underlying health conditions needing medical attention.
The safety profile of OTC Sildenafil is less studied than prescription versions.

Your doctor will tell you how much sildenafil to take and how often it can be taken. Sildenafil doses can be taken with or without food. Please read the Patient Information sheet before taking sildenafil. Take the prescribed dose about one hour before anticipated sexual activity. The dose could still work if it’s taken one-half hour to four hours before sexual activity. Sexual stimulation is needed for sildenafil to work. Do not take more than one dose in a 24-hour period. Take or administer the prescribed dose three times a day, four to six hours apart. Sildenafil oral suspension is prescribed for pulmonary hypertension. Please read and follow the Instructions for Use.

8.5 Geriatric Use

Take a missed dose as soon as it’s remembered. This medicine is not right for everyone. Do not use it if you have had an allergic reaction to sildenafil. Tell any doctor or other healthcare provider who treats you that you are taking sildenafil. The doctor may need to perform regular check-ups and tests to check the effectiveness and side effects of this treatment.

Yohimbine (Yocon)

Tell your doctor if you are pregnant, breastfeeding, or have: Kidney disease Liver disease Diabetes Bleeding problems Blood problems such as sickle cell anemia Bleeding problems or ulcers Obstruction of the small veins in the lungs (pulmonary veno-occlusive disease) Eye or vision problems Deformed penis shape Tell your doctor if you are pregnant, breastfeeding, or have: Blood problems such as sickle cell anemia Blood problems such as sickle cell anemia Obstruction of the small veins in the lungs (pulmonary veno-occlusive disease) Obstruction of the small veins in the lungs (pulmonary veno-occlusive disease) If sildenafil is prescribed for erectile dysfunction, the prescriber will need to know if you have: Chest pain during sex Heart disease Heart rhythm problems Low blood pressure or uncontrolled high blood pressure Any previous heart attack or stroke Any heart surgery in the last six months Pulmonary hypertension Multiple myeloma Any history of prolonged erections (longer than four hours) If sildenafil is prescribed for erectile dysfunction, the prescriber will need to know if you have: Low blood pressure or uncontrolled high blood pressure Low blood pressure or uncontrolled high blood pressure Any heart surgery in the last six months Any heart surgery in the last six months Any history of prolonged erections (longer than four hours) Any history of prolonged erections (longer than four hours) Make sure the doctor knows if you smoke or not. Make sure the doctor knows if you smoke or not. Sildenafil can cause serious problems, particularly at high doses: Heart problems Low blood pressure Prolonged or painful erections Sudden loss of vision in one or both eyes Hearing problems including hearing loss, ringing in the ears, and dizziness Sildenafil can cause serious problems, particularly at high doses: Sudden loss of vision in one or both eyes Sudden loss of vision in one or both eyes Hearing problems including hearing loss, ringing in the ears, and dizziness Hearing problems including hearing loss, ringing in the ears, and dizziness If sildenafil is being used for ED, do not continue having sex if you experience symptoms of heart problems such as chest pain or nausea. If sildenafil is being used for ED, do not continue having sex if you experience symptoms of heart problems such as chest pain or nausea. Sildenafil for ED does not protect you or your partner from sexually transmitted diseases. Do not use sildenafil oral suspension if it’s still in powder form. Shake the bottle for at least 10 seconds before measuring a dose. Use the oral syringe provided with the medicine to measure doses. Do not mix the dose with other liquids or flavorings.

Chemical synthesis

The dosage form and dosing schedule will depend on the condition being treated. Treats erectile dysfunction or pulmonary arterial hypertension. Antihypertensive, phosphodiesterase type 5 inhibitor (PDE-5 inhibitor) Antihypertensive, phosphodiesterase type 5 inhibitor (PDE-5 inhibitor) Sildenafil treats erectile dysfunction or pulmonary hypertension (high blood pressure in the arteries to the lungs). Tablet 20 mg (for pulmonary hypertension) 25 mg 50 mg 100 mg Oral suspension 10 mg/mL (pulmonary hypertension) Injection 10 mg/12.5 mL (pulmonary hypertension) 10 mg/12.5 mL (pulmonary hypertension) 10 mg/12.5 mL (pulmonary hypertension) For erectile dysfunction: 25–100 mg tablet taken only once daily at least one hour before sexual activity For erectile dysfunction: 25–100 mg tablet taken only once daily at least one hour before sexual activity For pulmonary hypertension: In adults and children 45 lbs or heavier: 20–80 mg taken orally three times daily OR 10 mg intravenous injection three times daily In children weighing less than 44 lbs: 10 mg three times daily In adults and children 45 lbs or heavier: 20–80 mg taken orally three times daily OR 10 mg intravenous injection three times daily In adults and children 45 lbs or heavier: 20–80 mg taken orally three times daily OR 10 mg intravenous injection three times daily In children weighing less than 44 lbs: 10 mg three times daily In children weighing less than 44 lbs: 10 mg three times daily Sildenafil Citrate12.5ml of 10mg/12.5ml vial Your doctor will tell you how much sildenafil to take and how often it can be taken. Your doctor will tell you how much sildenafil to take and how often it can be taken.

Sildenafil Tablets or Oral Suspension for PAH

Sildenafil doses can be taken with or without food. Please read the Patient Information sheet before taking sildenafil. Take the prescribed dose about one hour before anticipated sexual activity. The dose could still work if it’s taken one-half hour to four hours before sexual activity. Sexual stimulation is needed for sildenafil to work. The person getting the medicine should be sitting or standing upright. Place the syringe in the mouth against the cheek and squirt the dose into 200mg sildenafil citrate the cheek. Wash the syringe with water and allow it to dry after each use. Store sildenafil oral suspension in the refrigerator. Throw away any unused medicine 60 days after receiving it. Liqrev oral suspension can be kept for 90 days before it must be thrown away.

When oral medications might not be safe

Wash the syringe with water and allow it to dry after each use. Store sildenafil oral suspension in the refrigerator. Throw away any unused medicine 60 days after receiving it. Liqrev oral suspension can be kept for 90 days before it must be thrown away. For erectile dysfunction: If a dose is missed, take it when remembered but wait at least 30 minutes before attempting sexual activity.

Patient resources

Do not take two or more doses in any 24-hour period. If a dose is missed, take it when remembered but wait at least 30 minutes before attempting sexual activity. For pulmonary hypertension: Take a missed dose as soon as it’s remembered. If it’s almost time for the next dose, skip the 150mg sildenafil for sale missed dose and take the next dose as scheduled. Never take extra sildenafil to compensate for a missed dose. For erectile dysfunction: If a dose is missed, take it when remembered but wait at least 30 minutes before attempting sexual activity. Do not take two or more doses in any 24-hour period. If a dose is missed, take it when remembered but wait at least 30 minutes before attempting sexual activity. For pulmonary hypertension: Take a missed dose as soon as it’s remembered. If it’s almost time for the next dose, skip the 150mg sildenafil for sale missed dose and take the next dose as scheduled. Never take extra sildenafil to compensate for a missed dose.

OTC Sildenafil is frequently involved in drug misuse and abuse cases.
Many OTC Sildenafil supplements are labeled as dietary aids or supplements.
Consumers should educate themselves about potential risks before using OTC Sildenafil.
OTC Sildenafil products are sometimes flavored or disguised to appeal to consumers.
Purchasing OTC Sildenafil online can expose users to scams and frauds.
The legality of OTC Sildenafil depends on local drug laws and regulations.
OTC Sildenafil can cause allergic reactions in sensitive individuals.
OTC Sildenafil may interact negatively with herbal medicines.
The increase in OTC Sildenafil options raises concern about safety standards.
The best safeguard is to consult healthcare providers before OTC use.
OTC Sildenafil should not be used if experiencing chest pain or other health issues.

Take a missed dose as soon as it’s remembered. This medicine is not right for everyone. Do not use it if you have had an allergic reaction to sildenafil.

Upcoming Events

Do not take more than one dose in a 24-hour period. Take or administer the prescribed dose three times a day, four to six hours apart. Sildenafil oral suspension is prescribed for pulmonary hypertension. Please read and follow the Instructions for Use. Do not use sildenafil oral suspension if it’s still in powder form.

Sildenafil Tablets for ED

Shake the bottle for at least 10 seconds before measuring a dose. Use the oral syringe provided with the medicine to measure doses. Do not mix the dose with other liquids or flavorings. The person getting the medicine should be sitting or standing upright. Place the syringe in the mouth against the cheek and squirt the dose into 200mg sildenafil citrate the cheek. Tell any doctor or other healthcare provider who treats you that you are taking sildenafil. The doctor may need to perform regular check-ups and tests to check the effectiveness and side effects of this treatment.

Often, OTC Sildenafil is marketed with false claims of "all natural" ingredients.
OTC drugs containing Sildenafil are sometimes used as party drugs for ED enhancement.
Many countries have strict regulations banning OTC Sildenafil sales.
OTC Sildenafil can trigger dangerous hypotension in some users.
Users should avoid OTC Sildenafil if they are taking medications affecting blood flow.
OTC Sildenafil’s unregulated status increases the risk of adverse effects.
Proper dosage information is essential but often missing on OTC products.
OTC Sildenafil should be purchased from reputable sources to ensure safety.
Doctors warn against using OTC Sildenafil without proper diagnosis.
Long-term health effects of OTC Sildenafil are still under study.
OTC Sildenafil misuse can lead to serious health emergencies.

8.1 Pregnancy

Because of potentially hazardous drug interactions, sildenafil can never be safely used with: Other PDE-5 inhibitors such as vardenafil or tadalafil The pulmonary hypertension treatment Adempas (riociguat) Nitrates such as nitroglycerin Drugs that enhance sexual performance called “poppers” such as amyl nitrite Because of potentially hazardous drug interactions, sildenafil can never be safely used with: Other PDE-5 inhibitors such as vardenafil or tadalafil Other PDE-5 inhibitors such as vardenafil or tadalafil Drugs that enhance sexual performance called “poppers” such as amyl nitrite Drugs that enhance sexual performance called “poppers” such as amyl nitrite To avoid other drug interactions, make sure the prescriber knows about all prescription drugs, over-the-counter medications, and supplements you use, particularly: Alpha blockers, medicines commonly used to treat enlarged prostate or high blood pressure Other types of blood pressure drugs Other treatments or supplements for erectile dysfunction HIV/AIDS medications called protease inhibitors Azole antifungal drugs such as ketoconazole and itraconazole The antibiotics clarithromycin and erythromycin Amlodipine, bosentan, cimetidine, rifampin To avoid other drug interactions, make sure the prescriber knows about all prescription drugs, over-the-counter medications, and supplements you use, particularly: Alpha blockers, medicines commonly used to treat enlarged prostate or high blood pressure Alpha blockers, medicines commonly used to treat enlarged prostate or high blood pressure Other treatments or supplements for erectile dysfunction Other treatments or supplements for erectile dysfunction Azole antifungal drugs such as ketoconazole and itraconazole Azole antifungal drugs such as ketoconazole and itraconazole Find more detailed information about sildenafil interactions to avoid here. Contact a doctor if you notice any signs or symptoms of a possible serious side effect including: Chest pain, trouble breathing, sudden or severe headache, dizziness, arm or shoulder pain, nausea, cough Chest pain, trouble breathing, sudden or severe headache, dizziness, arm or shoulder pain, nausea, cough Painful erection or an erection that lasts longer than four hours Painful erection or an erection that lasts longer than four hours Sudden decrease in hearing, hearing loss, ringing in the ears, dizziness Sudden decrease in hearing, hearing loss, ringing in the ears, dizziness Allergic reaction: Itching or hives, swelling in your face or hands, swelling or tingling in your mouth or throat, chest tightness, trouble breathing Allergic reaction: Itching or hives, swelling in your face or hands, swelling or tingling in your mouth or throat, chest tightness, trouble breathing Warmth or redness in your face, neck, arms, or upper chest Warmth or redness in your face, neck, arms, or upper chest Find more detailed information about Viagra side effects here.

What Is Over-The-Counter Viagra?