Viagra Vs Cialis
Viagra
What is Viagra?
Viagra (sildenafil) relaxes muscles and increases blood flow to particular areas of the body.
Viagra is used to treat erectile dysfunction (impotence) in men. Another brand of sildenafil is Revatio, which is used to treat pulmonary arterial hypertension and improve exercise capacity in men and women.
Do not take Viagra while also taking Revatio, unless your doctor tells you to.
Important information about Viagra
You should not use Viagra if you are allergic to sildenafil.
Do not take Viagra if you are also using a nitrate drug for chest pain or heart problems. This includes nitroglycerin, isosorbide dinitrate, and isosorbide mononitrate. Nitrates are also found in some recreational drugs such as amyl nitrate or nitrite ("poppers"). Taking Viagra with a nitrate medicine can cause a sudden and serious decrease in blood pressure.
Contact your doctor or seek emergency medical attention if your erection is painful or lasts longer than 4 hours. A prolonged erection (priapism) can damage the penis.
Stop using this medicine and get emergency medical help if you have sudden vision loss.
Before taking Viagra
You should not use Viagra if you are allergic to sildenafil.
Do not take Viagra if you are also using a nitrate drug for chest pain or heart problems. This includes nitroglycerin, isosorbide dinitrate, and isosorbide mononitrate. Nitrates are also found in some recreational drugs such as amyl nitrate or nitrite ("poppers"). Taking Viagra with a nitrate medicine can cause a sudden and serious decrease in blood pressure.
To make sure Viagra is safe for you, tell your doctor about your other medical conditions, especially: * heart disease or heart rhythm problems, coronary artery disease; * a recent history (in the past 6 months) of a heart attack, stroke, or congestive heart failure; * high or low blood pressure; * liver or kidney disease; * a blood cell disorder such as sickle cell anemia, multiple myeloma, or leukemia; * a bleeding disorder such as hemophilia; * a stomach ulcer; * retinitis pigmentosa (an inherited condition of the eye); * a physical deformity of the penis (such as Peyronie's disease); or * if you have been told you should not have sexual intercourse for health reasons.
Viagra can decrease blood flow to the optic nerve of the eye, causing sudden vision loss. This has occurred in a small number of people taking Viagra, most of whom also had heart disease, diabetes, high blood pressure, high cholesterol, or certain pre-existing eye problems, and in those who smoke or are over 50 years old. It is not clear whether Viagra is the actual cause of vision loss. Stop using Viagra and get emergency medical help if you have sudden vision loss.
FDA pregnancy category B: This medication is not expected to be harmful to an unborn baby. Do not use Viagra without telling your doctor if you are pregnant or plan to become pregnant during treatment.
It is not known whether sildenafil passes into breast milk or if it could harm a nursing baby. Tell your doctor if you are breast-feeding a baby.
Do not give this medication to anyone under 18 years old without medical advice.
How should I take Viagra?
Take Viagra exactly as prescribed by your doctor. Follow all directions on your prescription label. Do not take this medicine in larger or smaller amounts or for longer than recommended.
Viagra is usually taken only when needed, 30 minutes to 1 hour before sexual activity. You may take it up to 4 hours before sexual activity. Do not take this medicine more than once per day.
Viagra can help you have an erection when sexual stimulation occurs. An erection will not occur just by taking a pill. Follow your doctor's instructions.
During sexual activity, if you become dizzy or nauseated, or have pain, numbness, or tingling in your chest, arms, neck, or jaw, stop and call your doctor right away. You could be having a serious side effect of Viagra.
Store at room temperature away from moisture and heat.
What happens if I miss a dose?
Since Viagra is used as needed, you are not likely to miss a dose. Do not take extra medicine to make up a missed dose.
What happens if I overdose?
Seek emergency medical attention or call the Poison Help line at 1-800-222-1222.
What should I avoid while taking Viagra?
Grapefruit and grapefruit juice may interact with Viagra and lead to unwanted side effects. Avoid the use of grapefruit products while taking this medicine.
Drinking alcohol can increase certain side effects of Viagra.
Avoid using any other medicines to treat impotence, such as alprostadil or yohimbine, without first talking to your doctor.
Viagra side effects
Get emergency medical help if you have any of these signs of an allergic reaction to Viagra: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.
Contact your doctor or seek emergency medical attention if your erection is painful or lasts longer than 4 hours. A prolonged erection (priapism) can damage the penis.
Stop using Viagra and call your doctor at once if you have: * vision changes or sudden vision loss; * ringing in your ears, or sudden hearing loss; * chest pain or heavy feeling, pain spreading to the arm or shoulder, nausea, sweating, general ill feeling; * irregular heartbeat; * swelling in your hands, ankles, or feet; * shortness of breath; or * a light-headed feeling, like you might pass out.
Common Viagra side effects may include: * warmth or redness in your face, neck, or chest; * headache; * upset stomach; or * diarrhea.
This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.
What other drugs will affect Viagra?
Do not take Viagra with similar medications such as avanafil (Stendra), tadalafil (Cialis) or vardenafil (Levitra). Tell your doctor about all other medications you use for erectile dysfunction.
Tell your doctor about all medicines you use, and those you start or stop using during your treatment, especially: * cimetidine; * bosentan; * imatinib; * nefazodone; * St. John's wort; * an antibiotic--clarithromycin, erythromycin, telithromycin; * antifungal medication--fluconazole, itraconazole, ketoconazole, miconazole, posaconazole, voriconazole; * heart or blood pressure medication--amlodipine, amiodarone, nicardipine, quinidine; * hepatitis C medications--boceprevir, telaprevir; * HIV/AIDS medication--atazanavir, delavirdine, efavirenz, fosamprenavir, indinavir, nelfinavir, nevirapine, ritonavir, saquinavir; * seizure medication--carbamazepine, fosphenytoin, oxcarbazepine, phenobarbital, phenytoin, primidone; or * tuberculosis medication--isoniazid, rifabutin, rifampin, rifapentine.
This list is not complete. Other drugs may interact with sildenafil, including prescription and over-the-counter medicines, vitamins, and herbal products.
For the Consumer
Applies to sildenafil: oral tablet
Other dosage forms: * intravenous solution
Along with its needed effects, sildenafil (the active ingredient contained in Viagra) may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.
Check with your doctor immediately if any of the following side effects occur while taking sildenafil:
Less common * Bladder pain * burning feeling in the chest or stomach * burning, crawling, itching, numbness, prickling, "pins and needles", or tingling feelings * cloudy or bloody urine * dizziness * increased frequency of urination * indigestion * pain on urination * stomach upset * tenderness in the stomach area
Rare
* Abnormal vision * anxiety * behavior change similar to drunkenness * bleeding of the eye * blurred vision * bone pain * breast enlargement * chest pain * chills * cold sweats * confusion * convulsions (seizures) * cool and pale skin * deafness or hearing loss * decrease in amount of urine or the frequency of urination * decreased vision * difficulty in concentrating * dizziness or lightheadedness, especially when getting up from a lying or sitting position suddenly * double vision * drowsiness * dry eyes * dry mouth * dryness, redness, scaling, or peeling of the skin * excessive hunger * eye pain * fainting or faintness * fast, irregular, or pounding heartbeat * feeling of something in the eye * fever or chills * headache (severe or continuing) * heart failure * hives * increase in the size of the pupil * increased sweating * increased thirst * itching of the skin * lower back or side pain * migraine headache * nausea (severe or continuing) * nervousness * nightmares * numbness of the hands * painful, swollen joints * prolonged, painful erection of penis * redness, burning, or swelling of the eyes * redness, itching, or tearing of the eyes * restless sleep * seeing shades of colors differently than before * sensitivity to light * shakiness * skin lesions with swelling * skin paleness * skin rash * skin ulcers * slurred speech * sore throat * sudden weakness * swelling of the face, hands, feet, or lower legs * trouble with breathing * twitching of the muscles * unusual feeling of burning or stinging of the skin * unusual tiredness or weakness * vision changes * vision loss, temporary
Incidence not known * Blindness
Some side effects of sildenafil may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects. Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:
More common * Aches or pains in the muscles * bloody nose * diarrhea * difficult or labored breathing * flushing * headache * pain or tenderness around the eyes and cheekbones * redness of the skin * sneezing * stomach discomfort following meals * stuffy or runny nose * trouble sleeping * unusually warm skin
Rare
* Abdominal or stomach pain * abnormal dreams * anxiety * clumsiness or unsteadiness * cough * diarrhea or stomach cramps (severe or continuing) * difficulty in swallowing * ear pain * increased amount of saliva * increased skin sensitivity * lack of coordination * loss of bladder control * mental depression * nausea * numbness or tingling of the hands, legs, or feet * rectal bleeding * redness or irritation of the tongue * redness, soreness, swelling, or bleeding of the gums * ringing or buzzing in the ears * sensation of motion, usually whirling, either of one's self or of one's surroundings * sexual problems in men (continuing), including failure to experience a sexual orgasm * sleepiness * sores in the mouth and on the lips * tense muscles * trembling and shaking * vomiting * waking to urinate at night * worsening of asthma
Dosage
For most patients, the recommended dose is 50 mg taken, as needed, approximately 1 hour before sexual activity. However, VIAGRA may be taken anywhere from 4 hours to 0.5 hour before sexual activity. Based on effectiveness and toleration, the dose may be increased to a maximum recommended dose of 100 mg or decreased to 25 mg. The maximum recommended dosing frequency is once per day.
The following factors are associated with increased plasma levels of sildenafil: age >65 (40% increase in AUC), hepatic impairment (e.g., cirrhosis, 80%), severe renal impairment (creatinine clearance <30 mL/min, 100%), and concomitant use of potent cytochrome P450 3A4 inhibitors [ketoconazole, itraconazole, erythromycin (182%), saquinavir (210%)]. Since higher plasma levels may increase both the efficacy and incidence of adverse events, a starting dose of 25 mg should be considered in these patients.
Ritonavir greatly increased the systemic level of sildenafil in a study of healthy, non-HIV infected volunteers. Based on these pharmacokinetic data, it is recommended not to exceed a maximum single dose of 25 mg of VIAGRA in a 48 hour period.
VIAGRA was shown to potentiate the hypotensive effects of nitrates and its administration in patients who use nitric oxide donors or nitrates in any form is therefore contraindicated.
When VIAGRA is co-administered with an alpha-blocker, patients should be stable on alpha-blocker therapy prior to initiating VIAGRA treatment and VIAGRA should be initiated at the lowest dose
Drug interactions

Nitrates
You should NOT take VIAGRA with nitrates. If you take any medicines that have nitrates in them (like nitroglycerin for chest pain)—every day or even once in a while—do NOT take VIAGRA. Nitrates are also found in recreational drugs such as amyl nitrate (“poppers”). Do not take VIAGRA if you take nitrates, often prescribed for chest pain, as this may cause a sudden, unsafe drop in blood pressure. If you are not sure if any of your medicines contain nitrates, or if you do not understand what nitrates are, ask your doctor or pharmacist.

Alpha-blockers
If you have prostate problems or high blood pressure for which you take medicines called alpha-blockers, your doctor may start you on a lower dose of VIAGRA.

Protease inhibitors
If you are taking protease inhibitors, such as for the treatment of HIV, your doctor may recommend a 25-mg dose and may limit you to a maximum single dose of 25 mg of VIAGRA in a 48-hour period.

REVATIO
VIAGRA should not be used with REVATIO or other products containing sildenafil.

Other drugs that enable erections.
VIAGRA should not be used with other ED treatments.

Pictures of Viagra

Cialis
What is Cialis?
Cialis (tadalafil) relaxes muscles and increases blood flow to particular areas of the body.
Cialis is used to treat erectile dysfunction (impotence) and symptoms of benign prostatic hypertrophy (enlarged prostate). Another brand of tadalafil is Adcirca, which is used to treat pulmonary arterial hypertension and improve exercise capacity in men and women.
Important information about Cialis
You should not use Cialis if you are allergic to tadalafil.
Do not take Cialis if you are also using a nitrate drug for chest pain or heart problems. This includes nitroglycerin, isosorbide dinitrate, and isosorbide mononitrate. Nitrates are also found in some recreational drugs such as amyl nitrate or nitrite ("poppers"). Taking Cialis with a nitrate medicine can cause a sudden and serious decrease in blood pressure.
Contact your doctor or seek emergency medical attention if your erection is painful or lasts longer than 4 hours. A prolonged erection (priapism) can damage the penis.
Stop using this medicine and get emergency medical help if you have sudden vision loss.
Before taking Cialis
You should not take Cialis if you are allergic to tadalafil.
Do not take Cialis if you are also using a nitrate drug for chest pain or heart problems. This includes nitroglycerin, isosorbide dinitrate, and isosorbide mononitrate. Nitrates are also found in some recreational drugs such as amyl nitrate or nitrite ("poppers"). Taking Cialis with a nitrate medicine can cause a sudden and serious decrease in blood pressure.
To make sure Cialis is safe for you, tell your doctor if you have any of these other conditions: * heart disease or heart rhythm problems, coronary artery disease; * a recent heart attack (within the past 90 days); * a recent history (in the past 6 months) of a stroke, or congestive heart failure; * angina (chest pain), high or low blood pressure; * liver or kidney disease (or if you are on dialysis); * a blood cell disorder such as sickle cell anemia, multiple myeloma, or leukemia; * a bleeding disorder such as hemophilia; * a stomach ulcer; * retinitis pigmentosa (an inherited condition of the eye); * a physical deformity of the penis (such as Peyronie's disease); or * if you have been told you should not have sexual intercourse for health reasons.
Cialis can decrease blood flow to the optic nerve of the eye, causing sudden vision loss. This has occurred in a small number of people taking Cialis, most of whom also had heart disease, diabetes, high blood pressure, high cholesterol, or certain pre-existing eye problems, and in those who smoke or are over 50 years old. Stop using Cialis and get emergency medical help if you have sudden vision loss.
FDA pregnancy category B. Cialis is not expected to harm an unborn baby. Tell your doctor if you are pregnant or plan to become pregnant during treatment with Adcirca.
It is not known whether tadalafil passes into breast milk or if it could harm a nursing baby. Tell your doctor if you are breast-feeding a baby.
How should I take Cialis?
Cialis is usually taken only once per day. Follow all directions on your prescription label. Do not take this medicine in larger or smaller amounts or for longer than recommended.
Cialis can be taken with or without food.
For erectile dysfunction, take the dose just before sexual activity but not more than once per day.
Cialis can help achieve an erection when sexual stimulation occurs. An erection will not occur just by taking a pill. Follow your doctor's instructions.
During sexual activity, if you become dizzy or nauseated, or have pain, numbness, or tingling in your chest, arms, neck, or jaw, stop and call your doctor right away. You could be having a serious side effect.
Do not break or split a tablet. Swallow it whole.
Do not take Cialis for erectile dysfunction if you are taking Adcirca for pulmonary arterial hypertension.
Store at room temperature away from moisture and heat.
What happens if I miss a dose?
If Cialis is used as needed, you are not likely to be on a dosing schedule.
If you take Cialis every day and you miss a dose, take the missed dose as soon as you remember. Skip the missed dose if it is almost time for your next scheduled dose. Do not take extra medicine to make up the missed dose.
What happens if I overdose?
Seek emergency medical attention or call the Poison Help line at 1-800-222-1222.
What should I avoid while taking Cialis?
Grapefruit and grapefruit juice may interact with Cialis and lead to unwanted side effects. Avoid the use of grapefruit products while taking this medicine.
Drinking alcohol can increase certain side effects of Cialis.
Avoid using any other medicines to treat impotence, such as alprostadil or yohimbine, without first talking to your doctor.
Cialis side effects
Get emergency medical help if you have any of these signs of an allergic reaction to Cialis: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.
Contact your doctor or seek emergency medical attention if your erection is painful or lasts longer than 4 hours. A prolonged erection (priapism) can damage the penis.
Stop using Cialis and call your doctor at once if you have: * vision changes or sudden vision loss; * ringing in your ears, or sudden hearing loss; * chest pain or heavy feeling, pain spreading to the arm or shoulder, nausea, sweating, general ill feeling; * irregular heartbeat; * swelling in your hands, ankles, or feet; * shortness of breath; * seizure (convulsions); or * a light-headed feeling, like you might pass out.
Common Cialis side effects may include: * headache; * redness or warmth in your face, neck, or chest; * cold symptoms such as stuffy nose, sinus pain, sore throat, cough; * upset stomach; or * muscle pain, back pain, pain in your arms or legs.
This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.
Cialis Dosing Information
Usual Adult Dose for Erectile Dysfunction:
Erectile dysfunction:
10 mg orally taken prior to anticipated sexual activity. The maximum recommended dosing frequency is once per day in most patients.
Alternatively, 2.5 mg orally once daily, without regard to timing of sexual activity. May increase to 5 mg orally once daily based on efficacy and tolerability.

Erectile dysfunction and benign prostatic hyperplasia together:
5 mg orally taken at approximately the same time every day.
Usual Adult Dose for Benign Prostatic Hyperplasia:
Benign prostatic hyperplasia and benign prostatic hyperplasia with erectile dysfunction:
5 mg orally taken at approximately the same time every day.
What other drugs will affect Cialis?
Tell your doctor about all medicines you use, and those you start or stop using during your treatment with Cialis, especially: * bosentan; * imatinib; * nefazodone; * St. John's wort; * an antibiotic--clarithromycin, erythromycin, telithromycin; * antifungal medication--itraconazole, ketoconazole, posaconazole, voriconazole; * heart or blood pressure medication--amlodipine nicardipine, quinidine; * hepatitis C medications--boceprevir, telaprevir; * HIV/AIDS medication--atazanavir, delavirdine, efavirenz, fosamprenavir, indinavir, nelfinavir, nevirapine, ritonavir, saquinavir; * seizure medication--carbamazepine, fosphenytoin, oxcarbazepine, phenobarbital, phenytoin, primidone; or * tuberculosis medication--isoniazid, rifabutin, rifampin, rifapentine.
This list is not complete. Other drugs may interact with tadalafil, including prescription and over-the-counter medicines, vitamins, and herbal products. Not all possible interactions are listed in this medication guide.
For the Consumer
Applies to tadalafil: oral tablet
Along with its needed effects, tadalafil (the active ingredient contained in Cialis) may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.
Check with your doctor immediately if any of the following side effects occur while taking tadalafil:
Less common * Arm, back, or jaw pain * blurred vision * chest pain or discomfort * chest tightness or heaviness * chills * cold sweats * confusion * dizziness * fainting * faintness or lightheadedness when getting up suddenly from a lying or sitting position * fast or irregular heartbeat * headache * hearing loss * nausea * nervousness * pain or discomfort in the arms, jaw, back, or neck * pounding in the ears * shortness of breath * slow or fast heartbeat * sweating * unusual tiredness or weakness * vomiting
Rare
* Painful or prolonged erection of the penis
Incidence not known * Abdominal or stomach pain * blindness * blistering, peeling, or loosening of the skin * cough * cracks in the skin * decrease or change in vision * diarrhea * difficulty with speaking * double vision * fast, irregular, pounding, or racing heartbeat or pulse * headache, severe and throbbing * hives or welts * inability to move the arms, legs, or facial muscles * inability to speak * itching * joint or muscle pain * loss of heat from the body * numbness or tingling of the face, hands, or feet * red irritated eyes * red skin lesions, often with a purple center * red, swollen skin * redness of the skin * redness or soreness of the eyes * scaly skin * skin rash * slow speech * sores, ulcers, or white spots in the mouth or on the lips * sudden cardiac death * swelling of the feet or lower legs
Some side effects of tadalafil may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects. Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:
More common * Acid or sour stomach * belching * heartburn * indigestion * stomach discomfort, upset, or pain
Less common * Bloody nose * body aches or pain * burning, crawling, itching, numbness, prickling, "pins and needles", or tingling feelings * burning, dry, or itching eyes * burning feeling in the chest or stomach * congestion * difficulty with moving * difficulty with swallowing * dry mouth * dryness or soreness of the throat * excessive eye discharge * eye pain * feeling of constant movement of self or surroundings * feeling of warmth, redness of the face, neck, arms and occasionally, upper chest * fever * hoarseness * increased erection * lack or loss of strength * loose stools * muscle aching or cramping * muscle stiffness * nasal congestion * neck pain * pain * pain in the arms or legs * pain or burning in the throat * redness, pain, swelling of the eye, eyelid, or inner lining of the eyelid * reduced sensitivity to touch * runny nose * sensation of spinning * sleepiness or unusual drowsiness * sleeplessness * spontaneous penile erection * stomach upset * swelling of the eyelids * swelling or puffiness of the eyes or face * swollen joints * tearing * tender, swollen glands in the neck * tenderness in the stomach area * trouble with sleeping * unable to sleep * upper abdominal or stomach pain * voice changes * watering of the eyes
Rare
* Changes in color vision
CIALIS for Use as Needed for Erectile Dysfunction * The recommended starting dose of CIALIS for use as needed in most patients is 10 mg, taken prior to anticipated sexual activity. * The dose may be increased to 20 mg or decreased to 5 mg, based on individual efficacy and tolerability. The maximum recommended dosing frequency is once per day in most patients. * CIALIS for use as needed was shown to improve erectile function compared to placebo up to 36 hours following dosing. Therefore, when advising patients on optimal use of CIALIS, this should be taken into consideration.
CIALIS for Once Daily Use for Erectile Dysfunction * The recommended starting dose of CIALIS for once daily use is 2.5 mg, taken at approximately the same time every day, without regard to timing of sexual activity. * The CIALIS dose for once daily use may be increased to 5 mg, based on individual efficacy and tolerability.
CIALIS for Once Daily Use for Benign Prostatic Hyperplasia ​The recommended dose of CIALIS for once daily use is 5 mg, taken at approximately the same time every day.
CIALIS for Once Daily Use for Erectile Dysfunction and Benign Prostatic Hyperplasia ​The recommended dose of CIALIS for once daily use is 5 mg, taken at approximately the same time every day, without regard to timing of sexual activity.
Use with Food
CIALIS may be taken without regard to food.
Use in Specific Populations
Renal Impairment
CIALIS for Use as Needed * ​Creatinine clearance 30 to 50 mL/min: A starting dose of 5 mg not more than once per day is recommended, and the maximum dose is 10 mg not more than once in every 48 hours. * ​Creatinine clearance less than 30 mL/min or on hemodialysis: The maximum dose is 5 mg not more than once in every 72 hours [see Warnings and Precautions (5.7) and Use in Specific Populations (8.7)].
CIALIS for Once Daily Use ​Erectile Dysfunction * ​Creatinine clearance less than 30 mL/min or on hemodialysis: CIALIS for once daily use is not recommended [see Warnings and Precautions (5.7) and Use in Specific Populations (8.7)]. ​Benign Prostatic Hyperplasia and Erectile Dysfunction/Benign Prostatic Hyperplasia * ​Creatinine clearance 30 to 50 mL/min: A starting dose of 2.5 mg is recommended. An increase to 5 mg may be considered based on individual response. * ​Creatinine clearance less than 30 mL/min or on hemodialysis: CIALIS for once daily use is not recommended [see Warnings and Precautions (5.7) and Use in Specific Populations (8.7)].
Hepatic Impairment
CIALIS for Use as Needed * Mild or moderate (Child Pugh Class A or B): The dose should not exceed 10 mg once per day. The use of CIALIS once per day has not been extensively evaluated in patients with hepatic impairment and therefore, caution is advised. * Severe (Child Pugh Class C): The use of CIALIS is not recommended [see Warnings and Precautions (5.8) and Use in Specific Populations (8.6)].
CIALIS for Once Daily Use * Mild or moderate (Child Pugh Class A or B): CIALIS for once daily use has not been extensively evaluated in patients with hepatic impairment. Therefore, caution is advised if CIALIS for once daily use is prescribed to these patients. * Severe (Child Pugh Class C): The use of CIALIS is not recommended [see Warnings and Precautions (5.8) and Use in Specific Populations (8.6)].
Concomitant Medications
Nitrates
Concomitant use of nitrates in any form is contraindicated [see Contraindications (4.1)].
Alpha Blockers
ED — When CIALIS is coadministered with an alpha blocker in patients being treated for ED, patients should be stable on alpha-blocker therapy prior to initiating treatment, and CIALIS should be initiated at the lowest recommended dose ​BPH — CIALIS is not recommended for use in combination with alpha blockers for the treatment of BPH CYP3A4 Inhibitors
CIALIS for Use as Needed — For patients taking concomitant potent inhibitors of CYP3A4, such as ketoconazole or ritonavir, the maximum recommended dose of CIALIS is 10 mg, not to exceed once every 72 hours
CIALIS for Once Daily Use — For patients taking concomitant potent inhibitors of CYP3A4, such as ketoconazole or ritonavir, the maximum recommended dose is 2.5
Severe Interactions of Cialis Oral:
These medications are not usually taken together. Consult your healthcare professional (e.g., doctor or pharmacist) for more information.

CGMP SPECIFIC PDE TYPE-5 INHIBITORS/NITRATES
SILDENAFIL; TADALAFIL (FOR PAH)/BOCEPREVIR;TELAPREVIR
Moderate Interactions of Cialis Oral:
These medications may cause some risk when taken together. Consult your healthcare professional (e.g., doctor or pharmacist) for more information.

SILDENAFIL; TADALAFIL/POTENT CYP 3A4 INHIBITORS
TADALAFIL/PROTEASE INHIBITORS
CGMP SPECIFIC PDE TYPE-5 INHIBITORS/ALPHA-BLOCKERS
SILDENAFIL; TADALAFIL; VARDENAFIL (ED)/BOCEPREVIR;TELAPREVIR Pictures of Cialis