Sildenafil dosing question

It has a section on Penile Rehabilitation that includes some information related to your question: Best wishes. I would think your doctor would’ve checked up before prescribing it for you though, but you never know. You should at least mention to your doctor, the side effects you have felt from taking the drug.

2.1 Recommended Dosage in Adults

Concomitant use of organic nitrates in any form, either regularly or intermittently, because of the greater risk of hypotension Concomitant use of riociguat, a guanylate cyclase stimulator; PDE5 inhibitors, including this drug, may potentiate the hypotensive effects of riociguat. Known hypersensitivity to either the active component or to any of the ingredients of the tablet, injection, or oral suspension; hypersensitivity reactions have been reported, including anaphylactic reaction, anaphylactic shock, and anaphylactoid reaction Safety and efficacy have not been established in patients with ED younger than 18 years. Safety and efficacy have not been established in patients with PAH younger than 1 year. Due to high plasma protein binding and poor elimination in urine, removal via hemodialysis is unlikely. Tablets: Administer orally with or without food.

How do the side effects compare for vardenafil and sildenafil?

Reconstitute product before oral administration, and shake well before use. An oral syringe is recommended for dose measurement (and delivery). Use within 60 days after reconstitution; discard any remainder after expiration. The liquid suspension is premixed and may contain flavoring. Shake well before oral administration and use a calibrated measuring device for accurate dosing. See what he has to say about it.

• Sildenafil 10mg is commonly used to treat erectile dysfunction.
• It works by relaxing blood vessels in the penis.
• The medication is typically taken about 30-60 minutes before activity.
• Sildenafil 10mg can be prescribed for certain pulmonary conditions.
• Always follow your doctor’s dosage instructions carefully.

Yes, and I have spoken to her.

Parameter	Value	Notes
Absorption Rate	Rapid	Peak plasma levels in ~60 minutes
Bioavailability	Approximately 40%	Due to first-pass metabolism
Half-life	About 4 hours	Time to reduce plasma concentration by half
Metabolism	Liver (primarily via CYP3A4)	Enzymatic breakdown
Excretion	Mainly feces (~80%)	Some via urine (~13%)

The sildenafil is for "lung blood pressure", whatever that means. It has not impacted my pulse rate or my BP. I think I'm just sensitive to it.

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

It can cause problems if you normally have low blood pressure. Listen to the article instead of reading through it.

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

For patients dealing with erectile dysfunction (ED), certain drugs that influence the blood flow to pelvic organs can help in restoring and maintaining an erection.

Product	Dosage	Quantity + Bonus	Price
Viagra Generic	25mg	30 + 4 Pills	47.97€ 45.69€	Buy
Viagra Generic	150mg	180 + 10 Pills	236.46€ 225.20€	Buy
Kamagra Polo	100mg	20 Pills	83.56€ 79.58€	Buy
Viagra Generic	150mg	270 + 10 Pills	326.61€ 311.06€	Buy
Kamagra Polo	100mg	180 + 8 Pills	446.52€ 425.26€	Buy
Viagra Generic	25mg	120 + 6 Pills	125.56€ 119.58€	Buy
Viagra Generic	100mg	90 + 6 Pills	129.02€ 122.88€	Buy
Viagra Generic	150mg	360 + 10 Pills	423.48€ 403.31€	Buy
Kamagra	100mg	84 + 6 Pills	264.44€ 251.85€	Buy
Viagra Generic	25mg	180 + 6 Pills	154.93€ 147.55€	Buy
Viagra Generic	50mg	180 + 8 Pills	158.82€ 151.26€	Buy
Viagra Generic	25mg	360 + 10 Pills	213.68€ 203.50€	Buy
Kamagra Soft Tabs	100mg	20 Pills	79.79€ 75.99€	Buy
Kamagra Soft Tabs	100mg	60 + 4 Pills	180.59€ 171.99€	Buy
Kamagra Oral Jelly	100mg	21 Sachets	95.92€ 91.35€	Buy
Kamagra Polo	100mg	84 + 4 Pills	244.49€ 232.85€	Buy

Tadalafil and Sildenafil are two such medications typically prescribed for this condition.

Other targets: Side effects

IV: Administer as an IV bolus injection; the supplied product is ready for use. Tablets/IV solution: Store at 20C to 25C (68F to 77F); excursions permitted to 15C to 30C (59F to 86F). Oral suspension (liquid): Store at 20C to 25C (68F to 77F); excursions permitted to 15C to 30C (59F to 86F). Oral suspension (powder): Store below 30C (86F) in the original package in order to protect from moisture. After reconstitution, store below 30C (86F) or in refrigerator at 2C to 8C (36F to 46F); do not freeze.

Special Populations

Oral suspension (powder): Reconstitute with water (total 90 mL) in separate additions; shake vigorously after each addition. Do not mix with other medications or flavoring; insert adaptor into bottle neck. Consult the manufacturer product information for detailed instructions. Cardiovascular: Cardiac status/risk factors (prior to initiation); blood pressure (periodically during treatment in patients with PAH on concomitant anti-hypertensive agents) Drug Interactions: For concomitant use of medications that may be contraindicated or for dose adjustment (at baseline and during treatment) Ocular: NAION risk factors (prior to initiation) Read the US FDA-approved patient labeling (Patient Information and/or Instructions for Use). Tell your healthcare provider about all of the medicines you (or your child take). Both of these work by inhibiting phosphodiesterase type 5 (PDE5), an enzyme found primarily in the vascular smooth muscle of the corpus cavernosum, thus promoting blood flow necessary for achieving an erection. However, they differ slightly in their pharmacodynamics and duration of action. Tadalafil, known under the brand name Cialis among others, has a longer half-life, which allows it to provide therapeutic effects up to 36 hours after dosing; hence its nickname "the weekend pill". On the other hand, Sildenafil or Viagra typically lasts approximately 4-6 hours before its effects start wearing off. Tadalafil (the generic name for Cialis) was a significant advancement in the class of drugs known as PDE5 inhibitors, which were developed after the first class of erectile dysfunction drugs.

• 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.

This medication works by blocking an enzyme called phosphodiesterase type 5, effectively increasing blood flow to certain parts of the body. It is most commonly prescribed for erectile dysfunction and benign prostatic hyperplasia (enlarged prostate).

5.8 Vaso-occlusive Crisis in Patients with Pulmonary Hypertension Secondary to Sickle Cell Disease

Regular and/or intermittent use of nitric oxide donors (e.g., organic nitrates or nitrites) in any form Other PDE5 inhibitors or products containing sildenafil Seek immediate medical attention in the event of: Sudden loss of vision in one or both eyes Sudden decrease or loss of hearing; may be accompanied by tinnitus and dizziness An erection that persists longer than 4 hours. It is not recommended to take this drug more than once a day. This medication can cause your blood pressure to unsafely drop suddenly if it is taken with certain other medicines. Stop sexual activity and seek medical attention if you experience symptoms such sildenafil tablet manforce 50 mg as chest pain, dizziness, or nausea during sex, or if you have any side effect that bothers you or does not go away. Use protective measures to guard against sexually transmitted diseases, including the Human Immunodeficiency Virus (HIV).

Patient resources

For those of you taking Sildenafil (Viagra) to help with ED, I am asking this dosing question. I just got my first script from the online pharmacy my doctor sent it to, and the bottle says "Take two pills daily and 3 more 1 hour before sexual activity." And then on the "appointed day" take 5? Go to the Prostate Cancer Support Group. It seems to be common to do this to try and resolve ED issues. I'm not a medical professional, but here's a document on UCSF that someone on this blog mentioned in another thread. Tadalafil has a selective influence on PDE5 with only minor effects on other phosphodiesterases, resulting in fewer side effects than other medications that have stronger impacts on these other enzymes. Notably, one feature distinguishing tadalafil from sildenafil (Viagra) is its longer duration of action—up to 36 hours compared to sildenafil's four-to-six-hour window—earning it the nickname "The Weekend Pill." Tadalafil is approved for the treatment of various conditions, including: Benign prostatic hyperplasia (BPH), a non-cancerous enlargement of the prostate gland Pulmonary arterial hypertension (PAH), high blood pressure in lungs' arteries.

• Sildenafil 10mg is available by prescription only.
• Do not exceed the recommended dose to prevent adverse effects.
• Alcohol consumption can increase side effects of sildenafil.
• Sildenafil 10mg may interact with certain medications.
• Patients with heart issues should consult a doctor before use.

Sildenafil shares similar approvals but is also specifically authorized to treat altitude sickness. Tadalafil helps to manage erectile dysfunction by increasing the amount of nitric oxide available in the muscles of the penis.

What Is Silenafil and How Does It Work?

Use: For the treatment of PAH (WHO Group I) to improve exercise ability and delay clinical worsening TABLETS (Viagra) Initial dose: 25 mg orally once a day, as needed, about 1 hour prior to sexual activity Maintenance dose: May titrate up to 100 mg orally once a day, based on effectiveness and toleration. Maximum dose: 100 mg orally once a day Comments: This drug may be administered anywhere from 30 minutes to 4 hours before sexual activity. A reduced starting dose is recommended in older adults due to higher systemic exposure as compared to younger adults. TABLETS (Revatio)/ORAL SUSPENSION (Revatio) 1 to less than 18 years: Weight 20 kg or less: 10 mg orally 3 times a day Weight greater than 20 kg to 45 kg: 20 mg orally 3 times a day Weight greater than 45 kg: 20 mg orally 3 times a day; dose may be titrated up to a maximum of 40 mg orally 3 times a day, if required, based on symptoms and tolerability Use: For the treatment of pulmonary arterial hypertension (WHO Group I) to improve exercise ability and, in pediatric patients too young to perform standard exercise testing, pulmonary hemodynamics thought to underlie improvements in exercise ERECTILE DYSFUNCTION: Mild to Moderate Renal Dysfunction (CrCl 30 to 80 mL/min): No adjustment recommended Severe Renal Dysfunction (CrCl less than 30 mL/min): Consider a starting dose of 25 mg orally once a day, about 1 hour prior to sexual activity Mild, Moderate, or Severe Renal Dysfunction (CrCl 80 to less than 30 mL/min): No adjustment recommended ERECTILE DYSFUNCTION: Mild, Moderate, or Severe Liver Dysfunction (Child-Pugh A, B, or C): Consider a starting dose of 25 mg orally once a day, about 1 hour prior to sexual activity. Mild or Moderate Liver Dysfunction (Child-Pugh A or B): No adjustment recommended Severe Liver Dysfunction (Child-Pugh C): Data not available in this population.

Revatio Tablets

Initiate treatment with 25 mg orally once a day, as needed, about 1 hour prior to sexual activity Patients should be stable on alpha blocker therapy prior initiating treatment with this drug. Administration with CYP450 3A4 Inhibitors (e.g., ketoconazole, itraconazole, saquinavir) or Erythromycin: Consider a starting dose of 25 orally once a day, as needed, about 1 hour prior to sexual activity. Recommended dose: 25 mg orally, as needed, about 1 hour prior to sexual activity Maximum dose: 25 mg orally within a 48 hour period Known hypersensitivity to either the active component or to any of the ingredients; hypersensitivity reactions have been reported, including rash and urticaria In patients who are using a guanylate cyclase (GC) stimulators, such as riociguat; phosphodiesterase type 5 inhibitors (PDE5), including this drug, may potentiate the hypotensive effects of GC stimulators. In patients who are using nitric oxide donors such as organic nitrates or organic nitrites in any form either regularly and/or intermittently; this drug has been shown to potentiate the hypotensive effects of nitrates based on its mechanism of action After patients have taken this drug for ED, it is unknown when nitrates, if necessary, can be safely administered. Although plasma levels of this drug at 24 hours post-dose are much lower than at peak concentration, it is unknown whether nitrates can be safely co-administered at this time point.