Interactions

A. Top Drug-Drug Interactions:

1.Nitrates (e.g., nitroglycerin, isosorbide dinitrate): Cialis and nitrates both lower blood pressure. Taking them together can cause a significant and potentially life-threatening drop in blood pressure (hypotension), leading to dizziness, fainting, or even heart attack or stroke. It is contraindicated to use Cialis with nitrates or recreational "poppers" (amyl nitrites).

2.Alpha-blockers (e.g., prazosin, terazosin, tamsulosin): Both Cialis and alpha-blockers relax blood vessels, which can lead to excessive blood pressure reduction when used together. This may result in dizziness, fainting, or orthostatic hypotension (a sudden drop in blood pressure when standing). If needed, your doctor may adjust the dosage or recommend spacing the medications.

3.Other antihypertensive drugs (e.g., atenolol, propranolol, enalapril, lisinopril): Cialis can enhance the blood-pressure-lowering effects of these medications. While this interaction is usually less severe than with nitrates or alpha-blockers, it can still cause dizziness or fainting in sensitive individuals. Close monitoring of blood pressure is recommended.

Other Drug-Drug interactions:

• Ketoconazole, itraconazole (used to manage fungal infection)
• Protease inhibitors (used to manage HIV infection) Ex. ritonavir, lopinavir
• Phenobarbital, phenytoin, carbamazepine (medicines used for fits)
• Rifampicin, erythromycin, clarithromycin (medicines used for bacterial infections)
• Other medicines used to improve blood flow to the penis (Ex. sildenafil)

B. Drug-Food Interactions:

Cialis (tadalafil) can interact with certain foods and beverages, potentially altering its effectiveness or increasing the risk of side effects. Here are the key drug-food interactions to be aware of:

1. Grapefruit and Grapefruit Juice: Grapefruit can increase the levels of tadalafil in your blood by interfering with its metabolism. This may amplify side effects, such as headaches, dizziness, or low blood pressure. Avoid consuming grapefruit or grapefruit juice while taking Cialis.
2. Alcohol: Drinking alcohol with Cialis can enhance the blood pressure-lowering effects of the medication, leading to symptoms like dizziness, lightheadedness, or fainting. Limiting alcohol intake is recommended while using Cialis.
3. High-Fat Meals: While Cialis can be taken with or without food, consuming it with a high-fat meal may delay its onset of action. Opt for lighter meals if rapid effectiveness is needed.
4. Caffeine: Though not a direct interaction, combining Cialis with high caffeine intake might worsen side effects like headaches or increase heart rate in sensitive individuals.

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If you have any questions or concerns about taking Cialis, you should consult your doctor or pharmacist. Information on international normalized][ermanent id=87880] is.

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Here are the key drug-food interactions:

1. Stomach-Stat>: Take Cialis with tadalafil as needed to maintain blood pressure levels. This might cause a drop in blood pressure that can amplify side effects such as dizziness or fainting. Avoid using Cialis while taking tadalafil.
2. Avanafil: While the incidence of side effects is low, some individuals experience high blood pressure or nausea from taking Cialis.

Cialis has been shown to cause some mild side effects. Talk to your health care provider if these do not go away within a few days. If you begin to experience more serious reactions, seek medical attention immediately.

Common side effects reported from Cialis use include:

• Headache
• Indigestion
• Heartburn
• Upset stomach
• Gas
• Nausea
• Flushing

More severe side effects include:

• Painful erections or erections that last longer than 4 hours
• Sudden loss of vision
• Sudden loss of hearing
• Ringing in the ears
• Chest pain
• Shortness of breath
• Painful urination
• Increased urination frequency
• Fainting
• Dizziness
• Skin rash
• Hives
• Facial swelling

If you experience any of these side effects, seek medical attention immediately. These are symptoms of a severe adverse reaction to this medication that require immediate treatment.

As with all prescription medications, inform your doctor of any medical conditions you currently manage. Tell them about any and all medications, prescription drugs, and supplements you are taking before starting treatment with Cialis. Cialis can interact with bodily substances, causing potentially serious adverse reactions.

Specifically, you should inform your health care provider of any alpha-blocker, antifungal, HIV protease inhibitor, or high blood pressure medication you are taking. Remember to mention any herbal products you use, especially St. John’s wort.

In addition, let your doctor know if you have recently had heart surgery or experience chest pain during sex. If you experience any changes in your heartbeat or chest pain during sex, contact your health care provider immediately.

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Verified Patients?

See My Vial Information.

Patients prescribed Cialis will receive a voucher for 100ml of their prescribed medication within 24 hours of taking it. The medication is to be stored at 25°C and out of reach of public health: directly from a Pharmacy or Rx patients information Box.

Patients prescribed Cialis will not be given a 90-day supply. Cialis is not for use in women and patients are encouraged tooe to Cialis for safety and efficacy.

Cialis is not for use in children. Consult your doctor if you think you are pregnant or planning to get pregnant.

Cialis 5mg vs. 20mg

Cialis 5mg is one of the most popular drugs to treat erectile dysfunction. It is a medication that is effective for treating erectile dysfunction in men. Cialis is a popular drug used to treat erectile dysfunction in men, such as ED. This medication works by relaxing the blood vessels in the penis, making it easier to get and keep an erection. Cialis works by inhibiting an enzyme called phosphodiesterase type 5 (PDE5). This enzyme breaks down cGMP, which causes the blood vessels in the penis to relax and become enlarged. The enlarged blood vessels allow the penis to harden and become a more rigid erection. Cialis can be taken by mouth, swallowed, or injected. It is important to note that Cialis should only be taken by adults and children under the supervision of a healthcare provider. This medication can be taken with or without food. It is important to note that this medication can cause side effects. If you are taking Cialis, it is important to consult your doctor before using it. They will need to determine the appropriate dosage and duration of treatment. It is important to follow the instructions provided by your healthcare provider. If you have any concerns, it is always best to consult your doctor. They will be able to provide guidance on the proper usage and dosage of Cialis, and it is always best to follow the instructions provided by your healthcare provider. You should also inform your healthcare provider of any other medications you are currently taking, such as nitrates or alpha-blockers. It is always best to discuss any pre-existing conditions with your healthcare provider before starting Cialis. It is important to note that it is advisable to avoid alcohol while taking Cialis, as it can increase the risk of side effects. It is also important to note that Cialis is not recommended for women, as it may cause birth defects in babies. It is also important to consult with your healthcare provider if you are pregnant or breastfeeding. In conclusion, Cialis is a popular medication used to treat erectile dysfunction in men, and it can be taken by mouth, swallowed, or injected. It is important to follow the instructions provided by your healthcare provider and to inform your healthcare provider of any other medications you are currently taking, such as nitrates or alpha-blockers. It is always best to consult with your healthcare provider if you are pregnant or breastfeeding. It is always important to consult with your healthcare provider if you are pregnant or breastfeeding.

Cialis has been shown to cause some mild side effects. Talk to your health care provider if these do not go away within a few days. If you begin to experience more serious reactions, seek medical attention immediately.

As with all prescription medications, inform your doctor of any medical conditions you are currently managing.

Erectile dysfunction

In rare cases, you’ve been told (months and years after) that you may become unable to get or maintain an erection during sexual activity.

Cialis-relatedricular impose effects.

If you are getting any of the following indicates that you are probably experiencing the effects of this – or that, you need to adjust your sexual health treatment.

Do not take Cialis if you are currently experiencing:

• low blood pressure - is proof your blood pressure is low – you might need as-yostenification therapy, whichicesterly described as “heterogenic” – “runs in your blood” – “looks like you might experience an unexpected drop in blood pressure” – or – feel faint – you feel light headed, short of breath – you feel unsteady – you are overweight, or you feel unsteady or light headed – you have a medical condition that affects your blood pressure – a sudden drop in blood pressure calledpriapism– or – a sudden stiff neck – a sudden chest pain – you experience a sudden decrease or loss of hearing – you experience a decrease or loss of vision – you experience a sudden, unpleasant vision effect when you blink a mental state that you feel is a reaction to a sudden decrease or loss of mental state – you experience a sudden, unpleasant, seeing, or feeling of pain in your eyes or head – you experience a sudden decrease or loss of hearing – you experience a sudden decrease or loss of vision in one or both eyes, or a sudden decrease or loss of vision in one or both eyes.
• signs of an allergy

In rare cases, Cialis-relatedricular impose effects are also reported in infants and children.

Impotence

In some rare cases, you may also experience difficulties in getting or maintaining an erection.

Panic

In some cases, you may also experience the following symptoms:

• chest pain – you might need to give your healthcare provider any kind of medical emergency – you feel a sudden, severe, long-lasting, difficult-to-treat, severe pain in your chest – you feel a sudden, rapid, deep, pounding sound – you feel a sudden, rapid, pounding sensation in your neck or jawline – you have chest pain, or you feel faint – you feel light headed or unsteady – you are faint – you are described as as if you are unconscious – you may feel light headed or unsteady – you are described as as if you are unconscious – you experience a sudden decrease or loss of sight in one or both eyes – you experience a sudden decrease or loss of hearing

Grapefruit and grapefruit juice together may reduce the effects of Cialis

How do I take Cialis?

Take Cialis exactly as instructed by your healthcare provider. Swallow the tablet whole with water. Do not crush, break, or chew the tablet. Your healthcare provider may alternate between taking your doses for 6 hours each day for 36 hours.

As with all prescription medications, be sure to inform your doctor of any medical conditions you are currently managing and of the available medications.

Cialis (Tadalafil) Dosage

Generic name:[cialis]Dosage form:tabletDrug class:

by Drugs.com. Last updated on Mar 22, 2025.

Cialis is the brand name for the medication tadalafil. Generic versions of tadalafil are available by prescription only. Cialis is a prescription medication and should only be used under the supervision and prescription of a qualified healthcare professional.

Cialis is used for:

• Erectile dysfunction (ED)
• Benign prostatic hyperplasia (BPH)
• Premenstrual syndrome
• Sexual dysfunction

Before starting tadalafil, tell your doctor about all of your medical conditions, including if you:

• Have glandular fever
• Have low or uncontrolled high blood pressure
• Have had heart surgery
• Have liver problems
• Have high blood pressure
• Have low levels of potassium, sodium, or magnesium
• Have an irregular heartbeat
• Have problems with the nerves or blood vessels in your penis (eg, angulation, angulation, or pain during erection)

Tell your doctor about all of the medicines you take including prescription and nonprescription (over-the-counter [COTC]) medicines, vitamins, and herbal supplements.

Cialis may raise your blood pressure and heart rate when taken with nitrates (eg, nitroglycerin).