Viagra Side Effects and Drug Interactions

Side Effects of Viagra

 

Along with its needed effects, a medicine 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:

Less common

  1. Bladder pain
  2. burning feeling in the chest or stomach
  3. burning, crawling, itching, numbness, prickling, “pins and needles”, or tingling feelings
  4. cloudy or bloody urine
  5. dizziness
  6. increased frequency of urination
  7. indigestion
  8. pain on urination
  9. stomach upset
  10. tenderness in the stomach area

Rare

  1. Abnormal vision
  2. anxiety
  3. behavior change similar to drunkenness
  4. bleeding of the eye
  5. blurred vision
  6. bone pain
  7. breast enlargement
  8. chest pain
  9. chills
  10. cold sweats
  11. confusion
  12. convulsions (seizures)
  13. cool and pale skin
  14. deafness or hearing loss
  15. decrease in amount of urine or the frequency of urination
  16. decreased vision
  17. difficulty in concentrating
  18. dizziness or lightheadedness, especially when getting up suddenly from a lying or sitting position
  19. double vision
  20. drowsiness
  21. dry eyes
  22. dry mouth
  23. dryness, redness, scaling, or peeling of the skin
  24. excessive hunger
  25. eye pain
  26. fainting or faintness
  27. fast, irregular, or pounding heartbeat
  28. feeling of something in the eye
  29. fever or chills
  30. headache (severe or continuing)
  31. increase in the size of the pupil
  32. increased sweating
  33. increased thirst
  34. lower back or side pain
  35. migraine headache
  36. nausea (severe or continuing)
  37. nervousness
  38. nightmares
  39. numbness of the hands
  40. painful, swollen joints
  41. prolonged, painful erection of penis
  42. redness, burning, or swelling of the eyes
  43. redness, itching, or tearing of the eyes
  44. restless sleep
  45. seeing shades of colors differently than before
  46. sensitivity to light
  47. shakiness
  48. skin lesions with swelling
  49. skin paleness
  50. skin rash, hives, or itching
  51. skin ulcers
  52. slurred speech
  53. sore throat
  54. sudden weakness
  55. swelling of the face, hands, feet, or lower legs
  56. trouble breathing
  57. twitching of the muscles
  58. unusual feeling of burning or stinging of the skin
  59. unusual tiredness or weakness
  60. vision changes
  61. vision loss, temporary

Incidence not known

  1. Blindness

Some side effects 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

  1. Aches or pains in the muscles
  2. bloody nose
  3. diarrhea
  4. difficult or labored breathing
  5. flushing
  6. headache
  7. pain or tenderness around the eyes and cheekbones
  8. redness of the skin
  9. sneezing
  10. stomach discomfort following meals
  11. stuffy or runny nose
  12. trouble sleeping
  13. unusually warm skin

Rare

  1. Abdominal or stomach pain
  2. abnormal dreams
  3. anxiety
  4. clumsiness or unsteadiness
  5. cough
  6. diarrhea or stomach cramps (severe or continuing)
  7. difficulty in swallowing
  8. ear pain
  9. increased amount of saliva
  10. increased skin sensitivity
  11. lack of coordination
  12. loss of bladder control
  13. mental depression
  14. nausea
  15. numbness or tingling of the hands, legs, or feet
  16. rectal bleeding
  17. redness or irritation of the tongue
  18. redness, soreness, swelling, or bleeding of the gums
  19. ringing or buzzing in the ears
  20. sensation of motion, usually whirling, either of one’s self or of one’s surroundings
  21. sexual problems in men (continuing), including failure to experience a sexual orgasm
  22. sleepiness
  23. sores in the mouth and on the lips
  24. tense muscles
  25. trembling and shaking
  26. vomiting
  27. waking to urinate at night
  28. worsening of asthma

Other side effects not listed may also occur in some patients. If you notice any other effects, check with your healthcare professional.

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Drug Interactions of Viagra

Although certain medicines should not be used together at all, in other cases two different medicines may be used together even if an interaction might occur. In these cases, your doctor may want to change the dose, or other precautions may be necessary. When you are taking this medicine, it is especially important that your healthcare professional know if you are taking any of the medicines listed below. The following interactions have been selected on the basis of their potential significance and are not necessarily all-inclusive.

Using this medicine with any of the following medicines is not recommended. Your doctor may decide not to treat you with this medication or change some of the other medicines you take.

  • Amprenavir
  • Amyl Nitrite
  • Atazanavir
  • Boceprevir
  • Cobicistat
  • Darunavir
  • Erythrityl Tetranitrate
  • Fosamprenavir
  • Indinavir
  • Isosorbide Dinitrate
  • Isosorbide Mononitrate
  • Lopinavir
  • Molsidomine
  • Nelfinavir
  • Nitroglycerin
  • Nitroprusside
  • Pentaerythritol Tetranitrate
  • Propatyl Nitrate
  • Riociguat
  • Ritonavir
  • Saquinavir
  • Telaprevir
  • Tipranavir

Using this medicine with any of the following medicines is usually not recommended, but may be required in some cases. If both medicines are prescribed together, your doctor may change the dose or how often you use one or both of the medicines.

  • Cannabis
  • Ceritinib
  • Clarithromycin
  • Conivaptan
  • Dihydrocodeine
  • Duvelisib
  • Fluconazole
  • Fosnetupitant
  • Idelalisib
  • Itraconazole
  • Ivosidenib
  • Larotrectinib
  • Lefamulin
  • Lorlatinib
  • Lumacaftor
  • Nefazodone
  • Netupitant
  • Simeprevir
  • Telithromycin
  • Voriconazole

Using this medicine with any of the following medicines may cause an increased risk of certain side effects, but using both drugs may be the best treatment for you. If both medicines are prescribed together, your doctor may change the dose or how often you use one or both of the medicines.

  • Alfuzosin
  • Bosentan
  • Bunazosin
  • Ciprofloxacin
  • Delavirdine
  • Doxazosin
  • Erythromycin
  • Etravirine
  • Ketoconazole
  • Moxisylyte
  • Nebivolol
  • Prazosin
  • Rifapentine
  • Silodosin
  • Tamsulosin
  • Terazosin
  • Trimazosin

Other Interactions

Certain medicines should not be used at or around the time of eating food or eating certain types of food since interactions may occur. Using alcohol or tobacco with certain medicines may also cause interactions to occur. The following interactions have been selected on the basis of their potential significance and are not necessarily all-inclusive.

Using this medicine with any of the following may cause an increased risk of certain side effects but may be unavoidable in some cases. If used together, your doctor may change the dose or how often you use this medicine, or give you special instructions about the use of food, alcohol, or tobacco.

  • Grapefruit Juice
  • Pomelo Juice