Indications for sildenafil?
- Erectile dysfunction
- Pulmonary arterial hypertension
Precautions of sildenafil?
Migraine - can induce migraines
Treatment with drugs that can cause hypotension - alpha blockers. Start with a low dose.
Contraindications of sildenafil
Treatment with other nitrates
Treatment with drugs that can cause hypotension
Side effects of sildenafil?
- Rash, diarrhoea, UTIs
- Tachycardia, hypotension
- Headache, dizziness, flushing
Dosage of sildenafil?
Take ~ 1 hour prior to sexual activity
Start with 50mg and increase to 100mg or decrease to 25mg depending on response
If elderly or taking ketoconazole, erythromycin or itraconazole, consider starting with 25mg
counselling for sildenafil and tadalafil?
if you take with food it may take longer to work
Ask if they are already taking any nitrates/blood pressure medications - may additionally lower blood pressure
This medication may cause visual disturbances
Avoid taking prazosin within 4 hours of taking sildenafil
Adverse effects of tadalafil?
- headache lasting 3-8 hours
- Muscle aches
Sewlling of eyes, visual problems
Doseage for tadalafil?
- Take 30 minutes - 12 hours before sexual activity and no more than one dose daily.
- Start with 10mg and increase upto 20mg or down to 5mg depending on response.
If required at least twice a week, take 2.5-5mg once daily