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Viagra mechanism of action

Common Questions and Answers about Viagra mechanism of action

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Avatar m tn I am not physically restricted - I walk 1 mile or more day and do 10 minutes of other light exercises most days. My BP runs under 120/80 most of the time. I understand carvedilol helps prevent stiffening of the heart muscle and can help restore LV function to some degree. How specially, so it do this? What is the biochemical mechanism?
Avatar n tn Blood levels of cyclosporine are increased if taken with grapefruit juice. A plausible mechanism involves the combined inhibition of enteric CYP3A4 and P-glycoprotein, which potentially leads to serious adverse events (e.g., nephrotoxicity).Blood levels of tacrolimus (Prograf) can also be equally affected for the same reason as with cyclosporine.
Avatar f tn Viagra is contraindicated in patients receiving aid donor of nitrogen oxide, organic nitrates or nitrates in any form. Sildenafil enhances the hypotensive action of nitrates.
Avatar n tn I dont have any desire for about 15 minutes If i masturbate before have sex with my partner and as you know after 15 minutes all things get into its first situation and I dont have any succeed.I use viagra because of this.I used sildnafil,viagra,sertrazin,and some other tablets.but there werent useful for me.when I feel I orgasm,I keep myself hard and prevent to orgasm,then my penis is weak and I cant do anything with my partner,I dont want to be embbarrase.I use viagra because of this.
Avatar m tn The mechanism of action of Campral® (acamprosate calcium) Delayed-Release Tablets in maintenance of alcohol abstinence is not completely understood. Originally, several neurotransmitter systems, including GABA, were investigated for a possible role in Campral's mechanism of action. However, recent evidence suggests Campral's main interaction is with the glutamate system. Chronic alcohol exposure is hypothesized to alter the normal balance between neuronal excitation and inhibition.
Avatar m tn http://www.nasdaq.
Avatar m tn Oyakawa I am in my 3rd year of medical school and I was wondering the mechanism of action of steroid injections in the eyelid causing cataracts. It is not an osmotic agent so why does that occur? thanks so much.
382218 tn?1341181487 Thanks for posting this DV. My favorite part was the mechanism of action for Tecfidera. "Poorly understood...
Avatar n tn I dont have any desire for about 15 minutes If i masturbate before have sex with my partner and as you know after 15 minutes all things get into its first situation and I dont have any succeed.I use viagra because of this.I used sildnafil,viagra,sertrazin,and some other tablets.but there werent useful for me.when I feel I orgasm,I keep myself hard and prevent to orgasm,then my penis is weak and I cant do anything with my partner,I dont want to be embbarrase.I use viagra because of this.
Avatar f tn Plavix has a unique mechanism of action by blocking the amplification of platelet activation by released ADP, and often used with aspirin to prevent the risk of clots for the first year after DES implant. Plavix and aspirin have different mechanism of action to prevent clots. After a year, plavix is usually discontinue as the risk for clots is decreased, and aspirin is continued long term. The risk of a clot is about 3%.
Avatar m tn if Viagra does not help then you have probably suffering from valve issues. your erection is effected by the meds you are taking and I am sure the Dr. you are seeing has told you these facts.. BP issues destroy the valves that hold the blood in the penis for the erection to hold.. You need to see an urologist that will exam you for the best fix.. I would say after 8 years it is time to take some action..
Avatar m tn HIV is transmitted by; Unprotected penetrative anal and/or vaginal sex Sharing works with other IV drug users Mother to child You never had an exposure.
Avatar n tn i am 23 and i stoped masterbating just last week and before that i used to masterbate 6 times a week because i could not control my desries and now im facing 2 problems, first is that when i do have sex with my partner, the sperm comes out really quik it only takes a few seconds and this makes my partner disatisfied and another problem is that when i do finsh, only tiny amount of sperm comes out....
Avatar m tn The one doctor that did the echocardiogram said he wanted me to do a stress/echo, but did not want to induce an arrythmia because I was afraid. None of these problmes started until I started taking viagra here and there about 5 years ago. Sometimes I feel like I did ireversable damage and something one day will happen. Then again I have times where I can exhert myself physically and be fine then there are time I cannot. It is like whatever this is will not make up its mind.
Avatar f tn Potassium is a chemical element and it is part of the electrolyte that should be in balance with other lytes to adequately conduct an electrical impulse that originates with the sinus node in the right atrium. The mechanism of action is not completely understood, but what is when a voltage (unit of potential for conduction) and electrolyte there will conduction and passage of electrical impluses.
Avatar m tn PDE-5 inhibitors (Viagra, Cialis, Levitra) and VIGAMED (oral phentolamine). Everything else (incl. 'herbal' supplements) is useless and a complete waste of money.
Avatar m tn Cialis is my favorite ED drug, it's really effective. If spontaneity is an issue, this is definitely the best choice. The effects of Cialis last for 36 hours (hence its name 'weekend pill'), whereas Viagra only lasts for about 4 hours. You should take Cialis on an empty stomach, at least one hour before sex. Don't take more than the prescribed dose.
Avatar m tn http://www.medscape.com/viewarticle/578705 Ribavirin improves early responses to peginterferon through improved interferon signaling. Gastroenterology. 2010 Jul;139 The therapeutic mechanisms of ribavirin for hepatitis C are unclear. Microarray analyses have shown that ribavirin increases induction of interferon-stimulated genes. We evaluated viral kinetics, serum cytokine expression, and viral mutagenesis during early stages of peginterferon therapy with and without ribavirin.
Avatar m tn Seeing an orthodontist is advised.
Avatar n tn Some medications are actually derived from plants. The mechanism of action and effect on the body determines the classification, therefore, laxatives can be synthetic or natural.
Avatar m tn thanks if you have taken the time to read this.... also after having a viagra, whilst having sex most of the time it feels as if blood cant get into the penis and is easily pushed out..
Avatar n tn "Mechanism of Action Oxomemazine, a phenothiazine derivative, is a sedating antihistamine" The above information is about all I could find on this drug. If it is used in the US, I have no idea what label it's under. Even if I had been able to find more information, I am not qualified to tell you to either stop or start or change any medications. You need to speak with your doctor or chemist for an answer to your question.
Avatar f tn , duloxetine) has a combination mechanism of action involving serotonin and norepinephrine making it useful in depression and also neuropathic pain. When a peripheral nerve is injured there is an increase in pain sensitive fibers leading to increase pain recognition. This causes a change in central (i.e., brain/spinal cord) recognition of pain. One major neurotransmitter involved in this is norepinephrine. Cymbalta works to modulate this change.
Avatar n tn A heart murmur is a sound heard as the blood flows through the heart and especially the blood flow through the heart valves. If there is a defect, a stethoscope hears a specific sound for different defects. â– Angiotensin-converting enzyme (ACE) inhibitors. ACE inhibitors lower the system's blood pressure. The mechanism of action is to relax the blood vessels and that provides less resistance for the heart to pump against and decreases blood pressure.