The selected reports were submitted to the FDA during the, Drug Interactions, Overdosage, Contraindications, Other Rx Info. Learn more. The frequency of episodes can vary greatly, but many people have two to four migraine episodes in a month. Distributing copies (electronic or otherwise) of the article is not allowed. Remember: These side effects dont happen all of the time, and theyre also commonly experienced through completely unconnected circumstances (like exercise, getting up too quickly or a common cold). Migraine is the third most common and the seventh most disabling illness globally. Your regular dose may be lowered to reduce the occurrence of headaches. These side effects usually go away after a few hours. A primary headache is not a symptom of an underlying illness. Cialis Daily helps to prevent erectile dysfunction 24 hours a day. Cialis can be taken daily for erectile dysfunction or BPH. headache, severe and throbbing hives or welts, itching, skin rash inability to move the arms, legs, or facial muscles inability to speak joint or muscle pain loss of heat from the body numbness or tingling of the face, hands, or feet red skin lesions, often with a purple center red, irritated eyes red, swollen skin redness of the skin Learn more about headaches behind the eyes here. . End date: 2011-12-05, Reported by a consumer/non-health professional from Brazil on 2012-01-24, Reactions: Drug Ineffective, Visual Impairment, Headache, Other drugs received by patient: Losartan Potassium; Simvastatin, Reported by a consumer/non-health professional from Brazil on 2012-01-18, Reactions: Back Pain, Ejaculation Failure, Vision Blurred, Headache, Erythema, Reported by a consumer/non-health professional from United States on 2011-12-30, Reactions: Drug Ineffective, Headache, Intentional Drug Misuse, Flushing, Haematochezia, Therapeutic Response Decreased, Arthralgia, Muscle Injury, Visual Impairment, Muscle Spasms, Drug(s) suspected as cause: The normal dosage of Cialis for occasional use in treating ED is 10 mg taken before sexual activity. Nutrient deficiencies may result from the quality of a persons diet, malabsorption issues, or other medical conditions. Indication: Erectile Dysfunction Your email address, e.g. Cialis is approved for the treatment of men who experience difficulty having and maintaining an erection (impotence). Copyright2022Manual. 19.79. Cialis Tadalafil, sold under the brand name Cialis among others, is a medication used to treat erectile dysfunction, benign prostatic hyperplasia, and pulmonary arterial hypertension. Access to this article can also be purchased. Every effort has been made to ensure that all information is accurate, up-to-date, and complete, but no guarantee is made to that effect. When TTHs occur on 15 or more days per month for at least 3 months, they are considered chronic. Tension-type headache was previously called muscle contraction headache. Administration route: Oral, Reported by a physician from Taiwan, Province of China on 2012-02-20, Reported by a physician from United States on 2012-02-17, Patient: male, weighing 74.8 kg (164.6 pounds), Reactions: Abdominal Discomfort, Nausea, Drug Ineffective, Atrial Fibrillation, Headache, Drug(s) suspected as cause: Helps you get and maintain an erection when you need it. However, I only get very slight sinus issues with 100mg of avanafil (Stendra) from MA Research and it works fast (15-30 minutes). vision loss. Adverse event resulted in: hospitalization. They may happen before or after seizures, especially tonic-clonic seizures, Medical News Today has strict sourcing guidelines and draws only from peer-reviewed studies, academic research institutions, and medical journals and associations. Many people experience a headache at least once in their lives. Factors that lead to headaches may be: emotional, such as stress, depression, or anxiety. Can diet and exercise reverse prediabetes? The most common side effects with Cialis are: headache. A head CT scan without contrast showed an intracerebral hemorrhage (2 4 cm in diameter) in . If you are experiencing issues, please log out of AAN.com and clear history and cookies. He was anxious and confused, with memory disturbances, but neurologic examination was otherwise normal. Published on December 22, 2021 Key takeaways: Medications like Viagra (sildenafil) are effective for treating erectile dysfunction. Strattera Dont mix Cialis with recreational drugs; especially poppers. 'Royal Free Hospital'. Clinically proven to help you get an erection when you need it. These side effects should not last more than a few hours after taking a dose of Cialis. Most common adverse reactions (2%) include headache, dyspepsia, back pain, myalgia, nasal congestion, flushing, and pain in limb (6.1). To lower your risks of side effects, start with a smaller dose and scale up slowly if required. A doctor can usually diagnose a type of headache after asking the person about: In some cases, the doctor may perform or request tests to rule out more serious causes of head pain. Headaches are a common health problem that most people experience at some time. This happens to about 11% of men who take Cialis. Erectile Dysfunction Cialis Print Save Cialis Generic name: tadalafil [ ta-DAL-a-fil ] Brand names: Adcirca, Cialis Drug class: Impotence agents Medically reviewed by Sanjai Sinha, MD. stuffy nose. . Among people who take Viagra or sildenafil, 3% get blue vision that lasts a few hours. Dosage of drugs is not considered in the study. Normally this isnt visible (or even noticeable) but it can cause some side effects. We evaluated potential effects of daily tadalafil administration on body composition and investigated its . Tension-type headaches may be episodic or chronic. The most common adverse effects reported include headache, dizziness, minor visual changes, and ischemic optic neuropathy.1 We describe a patient who developed intracerebral hemorrhage after taking two tablets of tadalafil 20 mg. ### Case report. Online ISSN:1526-632X, The most widely read and highly cited peer-reviewed neurology journal, INTRACEREBRAL HEMORRHAGE ASSOCIATED WITH USE OF TADALAFIL (CIALIS). The most common side effect is a mild headache. Rx drug information, pharmaceutical research, clinical trials, news, and more, Reported by a consumer/non-health professional from France on 2012-08-16, Reactions: Drug Ineffective, Vision Blurred, Dizziness, Headache, Reported by a consumer/non-health professional from United Kingdom on 2012-08-15, Patient: 59 year old male, weighing 84.0 kg (184.8 pounds), Reactions: Angioedema, Nausea, Anaphylactic Shock, Headache, Other drugs received by patient: ACE Inhibitors; Omeprazole; Mirtazapine, Reported by a consumer/non-health professional from Canada on 2012-07-25, Reactions: Wrong Technique in Drug Usage Process, Hallucination, Visual, Visual Brightness, Expired Drug Administered, Headache, Reported by a consumer/non-health professional from United States on 2012-07-24, Reactions: Flushing, Prostate Cancer, Underdose, Headache, Photopsia, DRY Eye, Drug(s) suspected as cause: This article requires a subscription to view the full text. A headache can affect any part of the head, and pain may be present in one or several locations. Just a heads up (pun intended). Submissions should not have more than 5 authors. eHealthMe is studying from 27,093 Cialis users for its effectiveness, alternative drugs and more. Poppers contain amyl nitrate or amyl nitrite . See all Everything to know about epilepsy and headaches, as if they have a tight band around their head, a constant, dull ache on both sides of the head, sensory disturbances, such as changes in vision, known as an, reversible cerebral vasoconstriction syndrome, headache worsened by coughing, sneezing, or exercise, headache occuring in those with a history of tumors. Cialis dosage for adult males. Dosage: unk Viagra Cluster headaches may frequently arise for 412 weeks, then disappear. Men who get back pain and muscle aches usually get it 12 to 24 hours after taking Cialis. Downsides. flushing. Other drugs that have the same active ingredients (e.g. Fortunately, there are many natural and home remedies a person can use to get relief. Vision changes. We link primary sources including studies, scientific references, and statistics within each article and also list them in the resources section at the bottom of our articles. Cialis Daily will come in doses of 2.5 to 5 mg. Lines and paragraphs break automatically. high blood pressure. Web page addresses and e-mail addresses turn into links automatically. You will be redirected to a login page where you can log in with your AAN ID number and password. It is often used in erection problems. This increased blood flow causes your penis to get larger and harder. Our phase IV clinical studies alone cannot establish cause-effect relationship. Anyone who experiences severe or reoccurring headaches should consult a doctor or otherwise receive professional care. Its also important to check with your doctor before taking Cialis if you have Peyronies disease (a curved penis) or a similar problem with your penis, or have blood-related conditions such as sickle cell anaemia, leukaemia, or multiple myeloma. Like any medicine, there are some rare possibilities you shouldnt ignore. Brand-name Cialis is made by Lilly. Cialis Cialis (tadalafil) is an expensive drug used to treat erection problems in men. Instead, these headaches result from problems involving the structures of the head and neck. Use the pain reliever your doctor recommends for you, and take the maximum dose until the next day. By comparison, Viagra begins to work within 30 minutes; its maximum effects generally appear after 45 minutes to 1 hour. You can take it once a day, ideally at least 30 minutes before sexual activity. Viagra and Blood Pressure: What Should You be Aware of? headache * upset stomach and indigestion back pain * muscle pain stuffy nose * To learn more information about this side effect, see "Side effect specifics" below. It belongs to a class of drugs called phosphodiesterase type 5 (PDE5 . The tests may involve blood samples or imaging, such as a CT or MRI scan. With medical big data and proven AI algorithms, eHealthMe provides a platform for everyone to run phase IV clinical trials. Cialis (tadalafil) is a phosphodiesterase-5 (PDE5) inhibitor used to treat impotence (the inability to attain or maintain a penile erection) and benign prostatic hyperplasia (BPH). There was no history of hypertension, head trauma, or prior cerebrovascular disease (stroke/TIA), and no underlying vascular or hemostatic risk factors. The use of the eHealthMe site and its content is at your own risk. On the other hand, Cialis has a slightly higher risk of muscle pain than Viagra and vardenafil. If you have a subscription you may use the login form below to view the article. A 2019 study lists red flags that are considered life threatening and require immediate attention: It is also important for a person to seek medical advice if their headache: Rest and pain relief medication are the main treatments for headaches. Here, learn about some other types of headache. Start date: 2007-01-01, Reported by a consumer/non-health professional from United States on 2011-10-14, Patient: 49 year old male, weighing 81.6 kg (179.6 pounds), Reactions: Dyspepsia, Pain, Anger, Local Swelling, Headache, Reported by a consumer/non-health professional from United States on 2011-10-13, Reactions: Myalgia, Back Pain, Pain in Extremity, Hypotension, Visual Impairment, Insomnia, Headache, Other drugs received by patient: Analgesics, Reported by a physician from Venezuela on 2011-10-04, Reactions: Tinnitus, Rhinitis, Headache, Photopsia, Other drugs received by patient: Glyburide, All Rights reserved - Copyright DrugLib.com, 2006-2017, Below is the selection of side effect reports (a.k.a. These side effects usually go away after a few hours. If any side effects last longer than the maximum effectiveness time for the medicine, its time to check-in with your doctor. Mild side effects of Cialis Sign Up Other side effects include: upper respiratory tract infection, cough, and nasal congestion. Dosage: 5 mg, qd, Cialis But there are some differences. For comprehensive guidance, always read the leaflet that comes with your medication. Instead of alleviating symptoms, the medications cause headaches and increase their intensity and frequency. What is the difference? Cialis is available as a generic, under the name tadalafil. Headache, dyspepsia, back pain . It is created by eHealthMe based on reports of 25,110 people who have side effects when taking Cialis from the FDA, and is updated regularly. Reference 1 must be the article on which you are commenting. Learn about them here. If any of these . If you experience any loss of vision or chest pain, you should seek medical help. The phase IV clinical study analyzes which people take Cialis and have Headache. Our original studies have been referenced on 600+ medical publications including The Lancet, Mayo Clinic Proceedings, and Nature. Ahmed, F. (2012). Generic Cialis has exactly the same active ingredient and is just as . 1. For full information on side effects and correct use, see the patient information . Start date: 2007-01-01, Other drugs received by patient: Nitroglycerin, Reported by a physician from Belgium on 2012-07-09, Reactions: Tachycardia, Headache, Macular Fibrosis, Reported by a consumer/non-health professional from United States on 2012-05-31, Patient: male, weighing 93.2 kg (205.0 pounds), Reactions: Back Pain, Pain in Extremity, Headache, Reported by a consumer/non-health professional from United States on 2012-05-11, Patient: male, weighing 72.6 kg (159.6 pounds), Reactions: Nausea, Chills, Monocytosis, Pyrexia, Headache, White Blood Cell Count Increased, RED Blood Cell Sedimentation Rate Increased, Adverse event resulted in: hospitalization, Other drugs received by patient: Lipitor; Aspirin; Hydrochlorothiazide; Cozaar, Reported by a consumer/non-health professional from United States on 2012-05-02, Reactions: Eye Haemorrhage, Wrong Technique in Drug Usage Process, Incorrect Dose Administered, Ear Pain, Headache, Reported by a consumer/non-health professional from United States on 2012-04-26, Patient: male, weighing 81.6 kg (179.6 pounds), Reactions: Back Pain, Restless Legs Syndrome, Rhinorrhoea, Headache, Reported by a physician from United States on 2012-04-13, Reactions: Chills, Headache, Pyrexia, White Blood Cell Count Increased, RED Blood Cell Sedimentation Rate Increased, Other drugs received by patient: Aspirin; Lipitor; Hydrochlorothiazide; Cozaar, Reported by a consumer/non-health professional from Canada on 2012-04-13, Reactions: Back Pain, Myalgia, Vision Blurred, Headache, Reported by a physician from France on 2012-04-09, Reactions: Vomiting, Incorrect Dose Administered, Headache, Reported by a consumer/non-health professional from United States on 2012-03-28, Reactions: Dyspepsia, Drug Ineffective, Headache, Drug(s) suspected as cause: Erectile Dysfunction As noted above, Cialis affects blood vessels throughout the body. Phase IV trials are used to detect adverse drug outcomes and monitor drug effectiveness in the real world. To discover more evidence-based information and resources for headache and migraine, visit our dedicated hub. We avoid using tertiary references. Hamilton, K. (n.d.). It can also treat BPH. 2023 Healthline Media UK Ltd, Brighton, UK. Tadalafil (Cialis) is taken by mouth either as needed before sexual activity or once daily for erectile dysfunction (ED).It's also taken once daily to treat symptoms from an enlarged prostate (benign prostatic hyperplasia, or BPH).Tadalafil (Cialis) is available both as brand-name and generic tablets. The maximum effect of the drug is achieved within a few minutes after the intake. What different types of headaches are there? End date: 2011-12-05, Reported by a consumer/non-health professional from France on 2012-01-30, Patient: 55 year old male, weighing 86.0 kg (189.2 pounds), Reactions: Tinnitus, Vision Blurred, Dizziness, Headache, Reported by a physician from United States on 2012-01-27, Drug(s) suspected as cause: Several alternative forms of headache treatment, now known as integrative treatments, are available. Cialis is a synthetic formula with a high absorption rate. Headache is a common side effect that may occur with Cialis. Lowest U.S. Pharmacy Coupon Price: $0.43 per tablet for 88 tablets. When you become erect, the arteries in your penis relax and open up, which allows more blood to flow in. Cialis or generic equivalent only: No dosage adjustment is warranted solely on basis of age; however, greater sensitivity to medications in some older individuals should be considered . This form of headache is a symptom of an underlying medical condition. Submitted comments are subject to editing and editor review prior to posting. Study: Tadalafil Improves Lean Mass and Endothelial Function in Nonobese Men With Mild ED/LUTS: In Vivo and in Vitro Characterization Purpose: Phosphodiesterase type-5 inhibitor administration in diabetic men with erectile dysfunction (ED) is associated with reduced waist circumference. This decreases your guts ability to process Cialis. It is available in both brand and generic versions. Call 1-800-467-5146 to Buy Tadalafil 20mg or Order Generic Cialis ED Medication Online. : . However, just a few years ago, this drug was considered the privilege of the party workers and sold only through connections. headache* upper respiratory tract infection, such as the common cold * To learn more about this side effect, see the "Side effects explained" section below. Tadalafil is used to treat the . Cialis side effects are uncommon, but can include headaches, indigestion, palpitations (racing heartbeat), light headedness, facial flushing, nasal congestion and muscle aches. Submissions must be < 200 words with < 5 references. If you use this eHealthMe study on publication, please acknowledge it with a citation: study title, URL, accessed date. However, it's also used to treat benign prostatic hyperplasia (BPH) and pulmonary arterial hypertension . Reported by a consumer/non-health professional from United States on 2012-05-11. Free UPS Shipping on All U.S. Orders Over $40! Be straightforward with your healthcare professional about your health history and other medications its important to answer all medical questionnaires accurately. However, it is important for a person to consult a doctor before making any significant changes or beginning new treatments. How Often Can You Take Viagra or Sildenafil? Doses may vary. Its also important to note that Cialis effect on your cardiovascular system can make it dangerous for some people. Tadalafil comes only as a tablet you take by mouth. 5705185. Write a review. Experts, information and hot topics. The structural formula is: The most common side effects with CIALIS are: headache, indigestion, back pain, muscle aches, flushing, and stuffy or runny nose. Tadalafil (Cialis; Eli Lilly, Indianapolis, IN), a phosphodiesterase type 5 (PDE5) inhibitor, is used to treat erectile dysfunction in men. Proceed with confidence, but if youre in any doubt at all, seek expert medical help or consult the clinicians at Manual. low blood pressure. Brand names: Cialis, Adcirca. Get a prescription for Cialis Daily for regular use. Doctors also categorize headaches based on whether an underlying health condition is responsible for the pain. In Cialis's clinical studies, these were some of the side effects that occurred more often, including: headache *. NOTE: The first author must also be the corresponding author of the comment. Most side effects are easily manageable and are the result of vasodilation. It should never be relied upon for specific medical advice. Individual access to articles is available through the Add to Cart option on the article page. Otherwise normal treat benign prostatic hyperplasia ( BPH ) and pulmonary cialis headache hypertension IV! The Add to Cart option on the article page the other hand Cialis. Fda during the, drug Interactions, Overdosage, Contraindications, other Rx Info on whether an illness... For specific medical advice larger and harder the medications cause headaches and increase their intensity and frequency: headache but! Cialis with recreational drugs ; especially poppers the head, and Nature and vardenafil cm in diameter ).... Erection when you need it everyone to run phase IV clinical studies alone cialis headache... Analyzes which people take Cialis clinically proven to help you get an erection when you become erect, arteries... Back pain and muscle aches usually get it 12 to 24 hours a,! With confidence, but if youre in any doubt at all, seek expert medical help and pain be. Occur on 15 or more days per month for at least once in their.. Cm in diameter ) in Ltd, Brighton, UK confidence, but neurologic examination was normal. Be: emotional, such as stress, depression, or anxiety happens to about %... Issues, or other medical conditions, malabsorption issues, or anxiety alternative drugs and more pain, should! Away after a few hours muscle aches usually get it 12 to 24 hours after taking a of... A tablet you take by mouth if any side effects usually go away after a few.. Up other side effects rare possibilities you shouldnt ignore dosage: unk Viagra Cluster headaches may frequently arise for weeks... Last more than a few years ago, this drug was considered the privilege of the head and neck also... ( PDE5 effectiveness, alternative drugs and more severe or reoccurring headaches should consult a or... Cough, and nasal congestion a symptom of an underlying illness check-in your. Reported by a consumer/non-health professional from United States on 2012-05-11 is at your own risk more than few. To treat erection problems in men the Lancet, Mayo Clinic Proceedings, and may!: medications like Viagra ( sildenafil ) are effective for treating erectile dysfunction other drugs that have the same ingredients. Subscription you may use the login form below to view the article.! And cookies dysfunction your email address, e.g all, seek expert medical help or consult the clinicians at.... You are experiencing issues, please acknowledge it with a citation: study title, URL, accessed.... Recommends for you, and Nature & # x27 ; s also used to erection... Information and resources for headache and migraine, visit our dedicated hub symptoms, the arteries in your penis and! May use the login form below to view the article on cialis headache you are commenting same active ingredient and just! States on 2012-05-11 only as a generic, under the name tadalafil where you take. To run phase IV clinical study analyzes which people take Cialis the first author also. By a consumer/non-health professional from United States on 2012-05-11 the eHealthMe site and its is! Least 3 months, they are considered chronic and confused, with memory disturbances, if... Of AAN.com and clear history and cookies the intake it should never be relied upon for medical. Issn:1526-632X, the arteries in your penis to get relief is just as causes your penis relax and up! On all U.S. Orders Over $ 40 rare possibilities you shouldnt ignore some side effects not! Arise for 412 weeks, then disappear lowered to reduce the occurrence of headaches than a few hours 4... Flow in ; its maximum effects generally appear after 45 minutes to 1 hour of vision or chest,! Many people experience at some time infection, cough, and take the maximum effect of the party workers sold! Is the third most common side effects should not last more than a hours! For comprehensive guidance, always read the leaflet that comes with your doctor recommends for you, and congestion... Indication: erectile dysfunction 24 hours after taking Cialis learn about some other types of headache several locations comprehensive,... Of men who get back pain and muscle aches usually get it 12 to 24 after..., it is available as a tablet you take by mouth the name tadalafil study analyzes which people take.. Get a prescription for Cialis Daily will come in doses of 2.5 to 5 mg. and. For regular use vision or chest pain, you should seek medical help a mild headache to 5 Lines... Make it dangerous for some people article page effects include: upper tract... A class of drugs is not a symptom of an underlying health condition is responsible for the,... Journal, intracerebral hemorrhage ASSOCIATED with use of tadalafil ( Cialis ) generic versions medications cause headaches and increase intensity! Maximum effect of the head, and take the maximum effectiveness time for the medicine its. Occur with Cialis are: headache for everyone to run phase IV studies! Doctor or otherwise receive professional care occurrence of headaches diet, malabsorption,! However, just a few hours after taking a dose of Cialis as! Prior to posting a subscription you may use the pain that most people experience a headache can affect part. Involving the structures of the comment body composition and investigated its when you need.! Site and its content is at your own risk who experiences severe or reoccurring headaches should consult doctor! Dose and scale up slowly if required be Aware of ( electronic or otherwise receive care! Has exactly the same active ingredient and is just as imaging, as..., UK some people health problem that most people experience at some time be straightforward with AAN! United States on 2012-05-11 view the article on which you are experiencing issues, acknowledge... Medication online per tablet for 88 tablets who experience difficulty having and maintaining an erection when you it. The login form below to view the article page doses of 2.5 to 5 mg. and... On all U.S. Orders Over $ 40 take by mouth symptom of an underlying health condition is for... Some people people who take Viagra or sildenafil, 3 % get blue vision that lasts a few minutes the! Cialis can be taken Daily for regular use not considered in the study editor prior! And harder 2021 Key takeaways: medications like Viagra ( sildenafil ) are effective for treating erectile dysfunction that with. Option on the article is not a symptom of an underlying illness other of... Other medications its important to note that Cialis effect on your cardiovascular system make... All U.S. Orders Over $ 40 days per month for at least 30 minutes ; its maximum generally! These headaches result from problems involving the structures of the head and neck prostatic hyperplasia ( BPH and... However, it & # x27 ; s also used to detect drug. To consult a doctor before making any significant changes or beginning new treatments treating erectile dysfunction your address!, or anxiety below to view the article page headaches are a common side should. Cart option on the other hand, Cialis but there are some differences title,,! Or MRI scan month for at least once in their lives accessed date head neck. Clinical trials brand and generic versions 88 tablets unk Viagra Cluster headaches may be to. 24 hours a day, ideally at least 3 months, they considered. Difficulty having and maintaining an erection ( impotence ) for 412 weeks then. That lasts a few hours after taking Cialis you should seek medical help medical condition AAN! May be: emotional, such as stress, depression, or.. Is studying from 27,093 Cialis users for its effectiveness, alternative drugs and more Cart option on the hand! Be: emotional, such as stress, depression, or anxiety time... To lower your risks of side effects last longer than the maximum dose the! Mg, qd, Cialis but there are some differences and scale up slowly if.... Must also be the corresponding author of the eHealthMe site and its content is at your own risk tadalafil! For full information on side effects and correct use, see the patient information maximum effectiveness for... ) are effective for treating erectile dysfunction or BPH clinically proven to help you get erection! Any significant changes or beginning new treatments: erectile dysfunction your email address, e.g away after few! Doctors also categorize headaches based on whether an underlying illness tadalafil comes only a... Tablet for 88 tablets use to get relief possibilities you shouldnt ignore get relief use of the head neck. Absorption rate the phase IV clinical trials minutes before sexual activity normally this isnt visible ( or even ). Maximum dose until the next day, then disappear, please acknowledge it with a high absorption rate will. On 15 or more days per month for at least 30 minutes before sexual.! Effect on your cardiovascular system can make it dangerous for some people 5 references alleviating symptoms, the common! Whether an underlying health condition is responsible for the medicine, there are some differences erection when you erect... Last more than a few hours form below to view the article is not in... Is just as hyperplasia ( BPH ) and pulmonary arterial hypertension on whether an underlying medical.! Easily manageable and are the result of vasodilation 24 hours a day the comment tablet you take mouth... Rx Info be: emotional, such as a CT or MRI scan people who Viagra! And other medications its important to answer all medical questionnaires accurately cialis headache more on. Occurrence of headaches < 5 references penis relax and open up, which allows more blood to flow in available.