Potent CYP3A4 inducers are expected to cause substantial decreases in sildenafil plasma levels primidone will decrease the level or effect of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism.
| Brand Name | Manufacturer | Country of Origin | Availability |
|---|---|---|---|
| Viagra | Pfizer | USA | Widely available |
| Kamagra | Ajanta Pharma | India | Limited markets |
| Sildenafil Sandoz | Novartis | Switzerland | Prescription only |
| Revatio | Pfizer | USA | For pulmonary hypertension |
| Bedrocan | Canadian Medical Cannabis | Canada | Not for oral use |
Potent CYP3A4 inducers are expected to cause substantial decreases in sildenafil plasma levels relacorilantrelacorilant increases levels of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism.
8.4 Pediatric Use
fexinidazole will increase the level or effect of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. ivosidenibivosidenib will increase the level or effect of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid coadministration of sensitive CYP3A4 substrates with ivosidenib or replace with alternative therapies. If coadministration is unavoidable, monitor patients for loss of therapeutic effect of these drugs. ivosidenib will increase the level or effect of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism.
Sildenafil Tablets or Oral Suspension for PAH
ketoconazoleketoconazole will increase the level or effect of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Coadministration with strong CYP3A4 inhibitors and sildenafil (for pulmonary arterial hypertension) is not recommended. When used for erectile dysfunction, consider reducing initial sildenafil dose of 25 mg in patients also taking a strong CYP3A4 inhibitor and monitor for sildenafil toxicities (eg, dyspepsia, headache, hypotension). ketoconazole will increase the level or effect of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. lenacapavirlenacapavir will increase the level or effect of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid coadministration of sildenafil with strong CYP3A4 inhibitors.
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relacorilant increases levels of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. ritonavirritonavir will increase the level or effect of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. ritonavir will increase the level or effect of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism.
Before taking this medicine
Potent CYP3A4 inducers are expected to cause substantial decreases in sildenafil plasma levels phenobarbital 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 phenoxybenzaminesildenafil increases effects of phenoxybenzamine by pharmacodynamic synergism. sildenafil increases effects of phenoxybenzamine by pharmacodynamic synergism. phentolaminesildenafil increases effects of phentolamine by pharmacodynamic synergism. sildenafil increases effects of phentolamine by pharmacodynamic synergism.
Does sildenafil interact with other medicines (drug interactions)?
phenytoinphenytoin 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 phenytoin 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 prazosinsildenafil increases effects of prazosin by pharmacodynamic synergism. sildenafil increases effects of prazosin by pharmacodynamic synergism. primidoneprimidone will decrease the level or effect of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. silodosinsildenafil increases effects of silodosin by pharmacodynamic synergism.
- The medication can cause dizziness; avoid driving until effects are known.
- Be aware of possible vision disturbances such as blurred vision or sensitivity.
- Seek medical advice if vision changes persist or worsen.
sildenafil increases effects of silodosin by pharmacodynamic synergism.
- Avoid grapefruit juice while taking sildenafil, as it may increase drug levels.
- Use caution if combining with other medications for managing blood pressure.
- Not suitable for women or children under 18 years old.
St John's WortSt John's Wort 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 St John's Wort will decrease the level or effect of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism.
What special precautions should I follow?
If concomitant use of strong CYP3A inhibitors is unavoidable, reduce crizotnib to 250 mg PO qDay. After discontinuation of a strong CYP3A inhibitor, resume crizotinib dose used prior to initiating the strong CYP3A4 inhibitor. crizotinib increases levels of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. dabrafenibdabrafenib 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 dabrafenib will decrease the level or effect of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism.
Sildenafil may cause side effects. Tell your doctor if any of these symptoms are severe or do not go away:
Potent CYP3A4 inducers are expected to cause substantial decreases in sildenafil plasma levels doxazosinsildenafil increases effects of doxazosin by pharmacodynamic synergism. sildenafil increases effects of doxazosin by pharmacodynamic synergism. Potent CYP3A4 inducers are expected to cause substantial decreases in sildenafil plasma levels eslicarbazepine acetate 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 fexinidazolefexinidazole will increase the level or effect of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Coadministration may increase risk for adverse effects of CYP3A4 substrates. Potent CYP3A4 inducers are expected to cause substantial decreases in sildenafil plasma levels terazosinsildenafil increases effects of terazosin by pharmacodynamic synergism.
More about sildenafil
chloramphenicolchloramphenicol will increase the level or effect of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. chloramphenicol will increase the level or effect of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. clarithromycinclarithromycin will increase the level or effect of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Coadministration of these phosphodiesterase inhibitors with clarithromycin, a CYP3A4 inhibitor is not recommended. Increased systemic exposure of these drugs may occur with clarithromycin; consider reduction of dosage for phosphodiesterase inhibitors.
Viagra Tablets
clarithromycin will increase the level or effect of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. conivaptanconivaptan will increase the level or effect of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Delay initiation of treatment with any CYP3A4 substrates for at least 7 days following discontinuation of conivaptan. conivaptan will increase the level or effect of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. crizotinibcrizotinib increases levels of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. sildenafil increases effects of terazosin by pharmacodynamic synergism.
- Sildenafil works by relaxing blood vessels in the penis.
- It requires sexual stimulation to be effective.
- Consult a doctor before starting to ensure safety.
tovorafenibtovorafenib will decrease the level or effect of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism.
Product Description
Refer to the prescribing information of PDE5 inhibitors for dose recommendations. lenacapavir will increase the level or effect of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. levoketoconazole will increase the level or effect of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. lonafarniblonafarnib will increase the level or effect of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. If coadministration unavoidable, monitor for adverse reactions and reduce CYP3A substrate dose in accordance with product labeling.
Does sildenafil cause different side effects in females?
lonafarnib will increase the level or effect of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. lopinavirlopinavir will increase the level or effect of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. lopinavir will increase the level or effect of sildenafil tablets lp 100 mg sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. mifepristonemifepristone will increase the level or effect of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. mifepristone will increase the level or effect of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid coadministration of tovorafenib (a weak CYP3A4 inducer) with CYP3A substrates where minimal concentration changes may lead to serious therapeutic failures.
6.2 Postmarketing Experience
mitotanemitotane decreases levels of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Potent CYP3A4 inducers are expected to cause substantial decreases in sildenafil plasma levels. mitotane decreases levels of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. nafcillinnafcillin 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 nafcillin will decrease the level or effect of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism.
Common Side Effects
Patients receiving indinavir with ritonavir should receive not more than 25 mg of sildenafil for treatment of erectile dysfunction in a 48-hour period, and patients receiving other protease inhibitors should use a lower initial sildenafil dose of 25 mg. Patient taking sildenafil for PAH with ritonavir is not recommended. pentobarbitalpentobarbital 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 pentobarbital 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 phenobarbitalphenobarbital will decrease the level or effect of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. If unavoidable, monitor patients for loss of efficacy unless otherwise recommended in the CYP3A4 substrate prescribing information.
- Common side effects include headaches, flushing, and nasal congestion.
- Serious side effects are rare but may include vision changes or prolonged erections.
- Report any adverse reactions to a healthcare provider immediately.