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This isn’t a good idea, as you can’t be sure whether these pills contain the medicine or are counterfeit. Keeping it simple, tadalafil lasts for 36 hours and sometimes longer, and has the longest duration of action of all the PDE5 inhibitors. This compares for example to sildenafil (Viagra) which lasts for around 4 hours. Erectile dysfunction (ED) is common, affecting up to 40% of men by the age of fifty. Most men with erectile dysfunction are in reasonable health, although it may be a sign of poor circulation and narrowing of the arteries.

Below are some answers to frequently asked questions about Cialis dosages. Doctors recommend using Cialis as a long-term treatment, even if you take it only on occasion to treat ED. If you and your doctor determine that Cialis is safe and effective for you, you’ll likely take it long term. Your doctor may increase your dose to 5 mg if the 2.5 mg-dose doesn’t work well for you. Below you’ll find information about dosage instructions and dosage options for Cialis.

Some side effects, however, are more serious, such as priapism (a prolonged and sometimes painful erection that lasts for more than four hours) or sudden vision or hearing loss. Cialis can cause blood pressure to drop suddenly to an unsafe level if taken with certain other medicines. Do not use Cialis or other ED medications with nitrates (a drug often prescribed for angina and other heart problems) or guanylate cyclase stimulators (a treatment for pulmonary hypertension). Tadalafil is a selective inhibitor of cyclic guanosine monophosphate (cGMP)-specific phosphodiesterase type 5 (PDE5). The physiologic mechanism of erection of the penis involves release of nitric oxide (NO) in the corpus cavernosum during sexual stimulation.

However, greater sensitivity to medications winsome older individuals should be considered [see Use In Specific Populations] . No adverse effects were observed in a study in which tadalafil was administered orally at doses of 60, 200, and1000 mg/kg/day to juvenile rats on postnatal days 14 to 90. The highest plasma tadalafil exposures (AUC)achieved were approximately 10-fold that observed at the MRHD. In a prenatal/postnatal developmental study in rats, postnatal pup survival decreased following maternal exposure to tadalafil doses greater than 10 times theMRHD based on AUC. Signs of maternal toxicity occurred at doses greater than 16 times the MRHD based onAUC.

This side effect can lead to priapism, which is a painful erection lasting longer than 4 hours. It’s considered an emergency because it can cause permanent damage to your penis, such as being unable to have erections at all. It usually occurs between 12 and 24 hours after taking Cialis. Usually, back pain goes away within 2 days of taking your dose.

In clinical pharmacology studies, tadalafil (5 to 20 mg) was shown to potentiate the hypotensive effect of nitrates. Therefore, the use of CIALIS in patients taking any form of nitrates is contraindicated [see CONTRAINDICATIONS] . The effect of PDE5 inhibition on cGMP concentration in the corpus cavernosum and pulmonary arteries is also observed in the smooth muscle of the prostate, the bladder and their vascular supply.

Patients should be counseled that concomitant use of CIALIS with nitrates could cause blood pressure to suddenly drop to an unsafe level, resulting in dizziness, syncope, or even heart attack or stroke. In patients with mild or moderate hepatic impairment, the dose of CIALIS should not exceed 10 mg. CIALIS should be limited to 5 mg not more than once in every 72 hours in patients with creatinine clearance less than 30 mL/min or end-stage renal disease on hemodialysis.

This has been far more effective than other prescription amounts and frequency. The letter I have just received from our Practice ( with no prior communication with myself) has reduced my prescription from the daily dose of 5mg to 10 mg per week&nbsp