Cialis side effects: what to expect
Cialis side effects are usually mild, like headache or flushing, but rare serious effects need urgent care. See what’s common, serious, and when to act.
Key facts
- Tadalafil Daily is $129/month (billed $387 every 90 days), charged only after a clinician approves it.
- Answer a few health questions online. A licensed clinician reviews them. If approved, it ships to your door.
- Adults 18 or older. A licensed clinician reviews your health history and decides whether treatment is appropriate for you. Availability depends on the state you live in.
Cialis (tadalafil) can cause side effects because it relaxes blood vessels and smooth muscle. Many people notice mild effects such as headache, flushing, or indigestion, especially when starting or changing how they use it. This guide breaks down common versus serious cialis side effects, what may help, and when to call a clinician. If you want to check what might be contributing to erectile dysfunction symptoms, Vitals Vault can help you start with labs and share results with a clinician.
- Cialis side effects are often mild, but some rare symptoms need urgent care.
- Headache, flushing, indigestion and back or muscle pain are among the most common effects.
- Serious risks include prolonged erection, sudden vision or hearing loss, and low blood pressure with nitrates.
- If you have chest pain, severe dizziness, or fainting after tadalafil, get emergency help.
Answer: what are Cialis side effects?
Most are mild
Most side effects of Cialis are related to blood vessel widening and smooth muscle relaxation. Common effects include headache, flushing, nasal congestion, indigestion, and back or muscle pain. Many improve as the medication wears off or as your body adjusts.
Some are urgent
Rare but serious side effects include an erection that will not go away (priapism), sudden vision loss, sudden hearing loss, and severe low blood pressure, especially if taken with nitrates. These symptoms need urgent evaluation.
Blood pressure usually falls, not rises
Tadalafil can lower blood pressure because it relaxes blood vessels. It is not expected to raise blood pressure, but dizziness or lightheadedness can happen, especially with alcohol or certain blood pressure medicines. If you faint or have severe dizziness, seek urgent care.
Common and serious side effects, explained
Headache
Headache is one of the most common tadalafil side effects and is related to blood vessel widening. Hydration and avoiding excess alcohol may help, and headaches often lessen after the first few uses. If you have a sudden severe headache with neurologic symptoms, get urgent care.
Flushing and nasal congestion
Warmth, facial flushing, and a stuffy nose can happen because tadalafil relaxes blood vessels. These effects are usually short-lived and mild. If flushing comes with chest pain, fainting, or severe shortness of breath, seek emergency help.
Indigestion or heartburn
Indigestion and reflux symptoms can occur because tadalafil relaxes smooth muscle, including in the digestive tract. Eating smaller meals and avoiding heavy alcohol may reduce discomfort. Persistent or severe symptoms should be discussed with a clinician to rule out other causes.
Back pain and muscle aches
Back pain and muscle aches can occur with tadalafil and may start after dosing and last longer than some other effects. The prescribing information notes these symptoms are usually self-limited. If pain is severe, persistent, or comes with weakness, fever, or dark urine, contact a clinician promptly.
Dizziness or low blood pressure
Because tadalafil can lower blood pressure, you may feel lightheaded, especially when standing up quickly, drinking alcohol, or taking other blood pressure lowering medicines. Severe dizziness, fainting, or collapse is an emergency. Never use tadalafil with nitrates due to the risk of dangerous hypotension.
Prolonged erection (priapism)
An erection lasting more than 4 hours is a medical emergency because it can damage penile tissue. This risk is higher if you have certain blood disorders or anatomical penile conditions. Get emergency care right away if this happens.
Sudden vision loss
Rare cases of sudden vision loss have been reported with PDE5 inhibitors, including tadalafil, and may be related to non-arteritic anterior ischemic optic neuropathy (NAION). Stop sexual activity and get urgent medical evaluation if you have sudden loss of vision in one or both eyes.
Sudden hearing loss or ringing
Sudden decrease or loss of hearing, sometimes with ringing in the ears or dizziness, has been reported. This needs urgent evaluation. Do not ignore these symptoms even if they seem to improve.
Chest pain during sex
Chest pain, faintness, or nausea during sexual activity can be a sign your heart is under strain. Seek emergency care and do not take nitrates if you have used tadalafil, unless a clinician directs you. Erectile dysfunction can also be an early sign of cardiovascular disease.
When to talk to a clinician or seek urgent care
Get emergency help now
Seek emergency care for chest pain, fainting, severe dizziness, signs of stroke, or severe allergic reaction. Get emergency care for an erection lasting more than 4 hours, sudden vision loss, or sudden hearing loss. These are rare but time-sensitive problems.
Call a clinician soon
Contact a clinician promptly if side effects are persistent, worsening, or interfering with daily life, including severe headache, significant heartburn, or back pain that does not improve. Also call if you have new shortness of breath, swelling, or palpitations.
Review your medication list
Ask a clinician or pharmacist to check for interactions before using tadalafil. Nitrates are contraindicated, and caution is needed with alpha-blockers, some blood pressure medicines, and strong CYP3A4 inhibitors. Alcohol can increase lightheadedness in some people.
If ED is new or changing
If erectile dysfunction is new, worsening, or comes with decreased exercise tolerance or chest symptoms, ask about cardiovascular risk assessment. ED can be associated with underlying vascular disease. A clinician can help decide what evaluation makes sense for you.
Pro tips to reduce discomfort
Go easy on alcohol
Alcohol can worsen dizziness, flushing, and headache with tadalafil.
Hydrate and rest
Hydration and sleep can make headaches and muscle aches easier to tolerate.
Avoid heavy meals if reflux hits
Smaller meals may help if you get heartburn or indigestion.
Track patterns
Note timing, food, alcohol, and other meds to discuss with a clinician.
Do not ignore red flags
Vision or hearing changes and erections over 4 hours need urgent care.
Frequently Asked Questions
Does Cialis raise blood pressure?
Cialis (tadalafil) is more likely to lower blood pressure than raise it because it relaxes blood vessels. Some people feel lightheaded, especially with alcohol or certain blood pressure medicines. Severe dizziness or fainting needs urgent care.
What are the side effects of Cialis?
Common side effects include headache, flushing, nasal congestion, indigestion or heartburn, and back or muscle pain. Rare but serious effects include prolonged erection, sudden vision loss, sudden hearing loss, and dangerous low blood pressure with nitrates. Review risks with a clinician if you have heart disease or take interacting medicines.
What are the side effects of cialis most people notice?
The side effects of cialis most often reported are headache, flushing, indigestion, nasal congestion, and back or muscle pain. These are usually mild and temporary. If symptoms are severe or persistent, contact a clinician to discuss possible contributors and alternatives.
Why does Cialis cause headache or back pain?
Tadalafil can widen blood vessels and affect smooth muscle, which can trigger headache in some people. Back pain and muscle aches are also listed side effects and may last longer than flushing or congestion. If pain is severe or comes with concerning symptoms, seek medical advice.
Can I take Cialis if I use nitroglycerin or other nitrates?
No. Tadalafil is contraindicated with nitrates because the combination can cause a dangerous drop in blood pressure. If you have chest pain and have taken tadalafil, seek emergency care and tell clinicians what you took.