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

8.2 Lactation

If possible, avoid with sensitive substrates that are are extensively metabolized by CYP3A4 and have a narrow therapeutic index. If unable to avoid, monitor or modify substrate dose according to its prescribing information. 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.

Incidence not known

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. hydrocortisonehydrocortisone will decrease the level or effect of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. hydrocortisone will decrease the level or effect of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. idelalisibidelalisib will increase the level or effect of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. lapatinib will increase the level or effect of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism.

Side Effect Frequency Severity Notes
Headache Common Mild Usually temporary
Flushing Common Mild Sudden redness of face
Nasal Congestion Common Mild Runny nose
Dyspepsia (Indigestion) Less common Mild Heartburn, upset stomach
Dizziness Less common Mild When standing up quickly

lesinurad (DSC)lesinurad (DSC) decreases levels of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. lesinurad (DSC) decreases levels of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism.

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letermovirletermovir increases levels of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism.

12.2 Pharmacodynamics

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

How long does it take for Sildenafil Citrate to work?

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. 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. letermovir increases levels of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism.

Medication Class Potential Effect Notes
Nitrates Severe hypotension Do not co-administer
CYP3A4 inhibitors (e.g., ketoconazole) Increased sildenafil levels Dose adjustment may be necessary
Alpha-blockers Risk of hypotension Use with caution
Other Vasodilators Additive blood pressure lowering Monitor closely

When amlodipine and sildenafil were used in combination, each agent independently exerted its own blood pressure lowering effect.

  • If you miss a dose and have planned sexual activity, take it as soon as possible.
  • Do not double doses to make up for missed ones.
  • Follow your prescription guidelines for safe and effective use.

lorlatiniblorlatinib will decrease the level or effect of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. lorlatinib will decrease the level or effect of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism.

Introduction to

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.

Interactions that increase your risk for side effects

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. mavacamtensildenafil increases levels of mavacamten by affecting hepatic enzyme CYP2C19 metabolism.

12.1 Mechanism of Action

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 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.

Postmarketing Reports

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 buy sildenafil online uk 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. Modify mavacamten dose if coadministered with weak or moderate CYP2C19 inhibitors.

Chemical synthesis

itraconazoleitraconazole will increase the level or effect of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Not recommended during and 2 weeks after itraconazole treatment when sildenafil is used for pulmonary arterial hypertension. itraconazole will increase the level or effect of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. labetalollabetalol increases effects of sildenafil by additive vasodilation. labetalol increases effects of sildenafil by additive vasodilation. sildenafil increases levels of mavacamten by affecting hepatic enzyme CYP2C19 metabolism.

Condition Explanation Precautions
Severe cardiovascular disease Increases risk of adverse cardiac events Consult a doctor before use
Nitrate medication use Can cause severe hypotension Do not combine with nitrates
Retina diseases (e.g., RP) Risk of vision loss Medical consultation required
Hypotension Blood pressure too low Monitor blood pressure closely

mavorixaformavorixafor will increase the level or effect of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Monitor for adverse effects of sensitive CYP3A4 substrates if coadministered with mavorixafor (a weak CYP3A4 inhibitor).

  • The onset of action for sildenafil is usually within 30 to 60 minutes.
  • The effect can last for up to 4-6 hours.
  • The duration may vary depending on individual health and dosage.

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

  • The medication's effectiveness may be reduced in men taking certain antidepressants.
  • Age can affect how the body responds to sildenafil.
  • Dose adjustments are sometimes necessary for older adults.

metoprololmetoprolol increases effects of sildenafil by additive vasodilation.

8.7 Patients with Renal Impairment

Coadministration of sildenafil with strong CYP3A4 inhibitors is not recommended. If using Viagra, consider decreasing starting dose. idelalisib will increase the level or effect of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. isoniazidisoniazid will increase the level or effect of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. isoniazid will increase the level or effect of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism.

Dosage for erectile dysfunction (ED)

istradefyllineistradefylline will increase the level or effect of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Istradefylline 40 mg/day increased peak levels and AUC of CYP3A4 substrates in clinical trials. This effect was sildenafil generic not observed with istradefylline 20 mg/day. Consider dose reduction of sensitive CYP3A4 substrates. istradefylline will increase the level or effect of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. metoprolol increases effects of sildenafil by additive vasodilation.

Brand names

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.

Rakshita Garg

epoprostenol increases effects of sildenafil by additive vasodilation. 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. miconazole vaginal will increase the level or effect of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism.