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Pharmacokinetics: How the Body Processes Sildenafil Citrate

Sildenafil > sildenafil citrates


epoprostenol increases effects of sildenafil by additive vasodilation.

  • Sildenafil molecules work by relaxing smooth muscle tissue.
  • This relaxation allows increased blood flow in blood vessels.
  • It is less effective without sexual arousal.
  • Some common brand names include Viagra, Revatio, and Kamagra.
  • Sildenafil's patent expired, leading to numerous generics.
  • Generic versions are usually more affordable.
  • It’s important to follow prescription instructions strictly.
  • Using more than the recommended dose can be dangerous.

erythromycin baseerythromycin base will increase the level or effect of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Consider a starting dose of 25 mg in patients treated with erythromycin. erythromycin base will increase the level or effect of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. erythromycin ethylsuccinate will increase the level or effect of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. erythromycin lactobionateerythromycin lactobionate will increase the level or effect of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. erythromycin lactobionate will increase the level or effect of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. erythromycin stearateerythromycin stearate will increase the level or effect of sildenafil by affecting hepatic/intestinal enzyme sildenafil spray CYP3A4 metabolism.

What side effects can this medication cause?

dronedarone will increase the level or effect of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. duvelisibduvelisib will increase the level or effect of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Coadministration with duvelisib increases AUC of a sensitive CYP3A4 substrate which may increase the risk of toxicities of these drugs. Consider reducing the dose of the sensitive CYP3A4 substrate and monitor for signs of toxicities of the coadministered sensitive CYP3A substrate. duvelisib will increase the level or effect of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism.

Pulmonary hypertension

efavirenzefavirenz will decrease the level or effect of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Potent CYP3A4 inducers are expected to cause substantial decreases in sildenafil plasma levels efavirenz will decrease the level or effect of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Potent CYP3A4 inducers are expected to cause substantial decreases in sildenafil plasma levels elagolixelagolix decreases levels of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Consider increasing CYP3A substrate dose if needed. elagolix decreases levels of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. erythromycin stearate will increase the level or effect of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. esmololesmolol increases effects of sildenafil by additive vasodilation. esmolol increases effects of sildenafil by additive vasodilation. etravirineetravirine will decrease the level or effect of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Potent CYP3A4 inducers are expected to cause substantial decreases in sildenafil plasma levels etravirine will decrease the level or effect of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Potent CYP3A4 inducers are expected to cause substantial decreases in sildenafil plasma levels fedratinibfedratinib will increase the level or effect of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Adjust dose of drugs that are CYP3A4 substrates as necessary. fedratinib will increase the level or effect of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism.

Property Description Value Notes
Molecular Formula - C22H30N6O4S Chemical composition
Molecular Weight - 474.6 g/mol Molar mass
Melting Point - 195-198°C Crystalline form
Solubility in Water - Slightly soluble At room temperature
pH of Aqueous Solution - 3.5 - 4.0 Depends on concentration

fluconazolefluconazole will increase the level or effect of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. fluconazole will increase the level or effect of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. fosamprenavirfosamprenavir will increase the level or effect of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. fosamprenavir will increase the level or effect of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism.

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fosaprepitantfosaprepitant will increase the level or effect of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. fosaprepitant will increase the level or effect of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism.

6. Response and effectiveness

betaxolol increases effects of sildenafil by additive vasodilation. bisoprololbisoprolol increases effects of sildenafil by additive vasodilation. bisoprolol increases effects of sildenafil by additive vasodilation. bosentanbosentan will decrease the level or effect of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Potent CYP3A4 inducers are expected to cause substantial decreases in sildenafil plasma levels bosentan will decrease the level or effect of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism.

How does sildenafil work (mechanism of action)?

Potent CYP3A4 inducers are expected to cause substantial decreases in sildenafil plasma levels butalbitalbutalbital will decrease the level or effect of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. butalbital will decrease the level or effect of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. carbamazepinecarbamazepine will decrease the level or effect of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Potent CYP3A4 inducers are expected to cause substantial decreases in sildenafil plasma levels carbamazepine will decrease the level or effect of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Potent CYP3A4 inducers are expected to cause substantial decreases in sildenafil plasma levels carvedilolcarvedilol increases effects of sildenafil by additive vasodilation.

Warnings for other groups

carvedilol increases effects of sildenafil by additive vasodilation. cenobamatecenobamate will decrease the level or effect of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Increase dose of CYP3A4 substrate, as needed, when coadministered with cenobamate. cenobamate will decrease the level or effect of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. cimetidinecimetidine will increase the level or effect of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. fosphenytoinfosphenytoin will decrease the level or effect of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Potent CYP3A4 inducers are expected to cause substantial decreases in sildenafil plasma levels fosphenytoin will decrease the level or effect of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Potent CYP3A4 inducers are expected to cause substantial decreases in sildenafil plasma levels gepotidacingepotidacin increases levels of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism.

Voir aussi

cimetidine will increase the level or effect of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. cyclosporinecyclosporine will increase the level or effect of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. cyclosporine will increase the level or effect of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. danazoldanazol will increase the level or effect of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. danazol will increase the level or effect of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism.

Autres utilisations

darunavirdarunavir will increase the level or effect of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Coadministration with PDE-5 inhibitors may result in an increase in PDE-5 inhibitor-associated adverse reactions (eg, hypotension, syncope, visual disturbances and priapism). darunavir will increase the level or effect of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. deferasiroxdeferasirox will decrease the level or effect of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. deferasirox will decrease sildenafil 130mg the level or effect of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism.

Pregnancy Categories

dexamethasonedexamethasone will decrease the level or effect of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. dexamethasone will decrease the level or effect of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. diltiazemdiltiazem will increase the level or effect of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. diltiazem will increase the level or effect of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. dronedaronedronedarone will increase the level or effect of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. If possible, avoid with sensitive substrates that are are extensively metabolized by CYP3A4 and have a narrow therapeutic index.

  • Sildenafil citrate can also treat pulmonary arterial hypertension.
  • It enhances exercise capacity in patients with this condition.
  • The drug’s effects usually last 4-6 hours.
  • Taking it with a high-fat meal can delay absorption.
  • Sildenafil should not be used with nitrate medications.
  • Serious side effects include vision changes and priapism.
  • It is contraindicated in individuals with certain heart conditions.
  • Patients should inform their doctor about all medications.

If unable to avoid, monitor or modify substrate dose according to its prescribing information.

In case of emergency/overdose

Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents. enzalutamideenzalutamide will decrease the level or effect of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Potent CYP3A4 inducers are expected to cause substantial decreases in sildenafil plasma levels enzalutamide will decrease the level or effect of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Potent CYP3A4 inducers are expected to cause substantial decreases in sildenafil plasma levels epoprostenolepoprostenol increases effects of sildenafil by additive vasodilation. gepotidacin increases levels of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. grapefruitgrapefruit will increase the level or effect of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. grapefruit will increase the level or effect of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. griseofulvingriseofulvin will decrease the level or effect of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. griseofulvin will decrease the level or effect of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism.