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However, you can also see this article for details about the potential side effects of Cialis.

How Long Does Cialis Take to Work?

However, never take two doses in 1 day. If you missed your dose yesterday, just skip the missed dose and continue with your once-a-day dosing. To help make sure that you don’t miss a dose, try setting a reminder on your phone. A medication timer may be useful, too. If you’re taking Cialis to treat BPH, this medication may be a long-term treatment.

Do you need a prescription for Cialis?

Cialis may also be taken to treat ED long term. But in some cases, your doctor may determine the cause of your ED, such as depression or an illness. In such instances, you may be able to stop taking Cialis after the cause of your ED has been treated. Cialis can cause mild or serious side effects. The following lists contain some of the key side effects that may occur while taking Cialis.

Dosage for erectile dysfunction (ED)

These lists don’t include all possible side effects. For more information on the possible side effects of Cialis, talk with your doctor or pharmacist. They can give you tips on how to deal with any side effects that may be concerning or bothersome. Note: The Food and Drug Administration (FDA) tracks side effects of drugs it has approved. If you would like to report to the FDA a side effect you’ve had with Cialis, you can do so through MedWatch. As with most drugs, some people can have an allergic reaction after taking Cialis. Allergic reactions did occur in clinical trials of Cialis, but it wasn’t reported how many people had them.

Product	Dosage	Quantity + Bonus	Price
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Symptoms of a mild allergic reaction can include: A more severe allergic reaction is rare but possible. This may include skin conditions such as Stevens-Johnson syndrome (a life threatening rash). Symptoms of a severe allergic reaction can include: swelling under your skin, typically in your eyelids, lips, hands, or feet swelling of your tongue, mouth, or throat severe rash, which may cause painful blisters Call your doctor right away if you have a severe allergic reaction to Cialis. Headache is a common side effect that may occur with Cialis. If you have headaches that are bothersome to you while using Cialis, talk with your doctor. They may be able to recommend ways to help ease this side effect. Changes in blood pressure are a possible side effect of taking Cialis. Low blood pressure occurs most often while taking this medication. But high blood pressure can occur as well. A decrease in blood pressure may be more likely if you’re taking Cialis along with other medications that can also lower blood pressure.

Key takeaways

In addition to the information below, you can see this comprehensive article about the dosages of Cialis. It’s available in four strengths: 2.5 milligrams (mg), 5 mg, 10 mg, and 20 mg. For symptoms of BPH, the recommended dosage of Cialis is 5 mg once a day. You should take the drug at about the same time each day. In some cases, your doctor may have you take 5 mg of Cialis a day along with finasteride (Proscar) to treat BPH.

Can I buy Cialis over the counter?

(See the “Cialis use with other drugs” section below to learn more.) If you take both Cialis and finasteride, you’ll usually take these two drugs for up to 26 weeks. Here’s some information on the Cialis dosages for ED. If your doctor recommends that you take Cialis only as needed for ED, the usual dosage is 10 mg before sexual activity. Your doctor may reduce this to 5 mg if the medication is working too well. But if this dose doesn’t work for you, your doctor may increase your dose back to 10 mg.

Alternatives for benign prostatic hyperplasia (BPH)

If the 10-mg dose of Cialis isn’t working well enough, your doctor may increase it to 20 mg. The maximum dose of Cialis that can be taken in a day is 20 mg. You should not take Cialis more than once a day. In clinical trials, Cialis helped with ED symptoms for up to 36 hours after their dose. So if you’re taking the medication only as needed, you shouldn’t have to take it every day. Symptoms of low blood pressure can include: If you have these symptoms while taking Cialis, tell your doctor right away. They’ll help determine what’s causing the low blood pressure and the best way to treat it. Although rare, Cialis may also increase your blood pressure. This side effect was reported only in people who took Cialis once a day for erectile dysfunction (ED).

• The maximum recommended dosing frequency for on-demand Cialis is once per day.
• A prescription provides a defined supply, preventing hoarding or misuse.
• Fake pills are a global problem, with seizures occurring at international borders.
• Conditions like multiple myeloma or leukemia can be associated with priapism risk.
• A urologist specializes in the male reproductive system and urinary tract.
• "Generic" drugs from unverified sources are not approved by the FDA.
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If you have any symptoms of high blood pressure, such as headaches or chest pain, tell your doctor right away. They’ll help determine what’s causing the increase in blood pressure and the best way to treat it. Back pain is a common side effect with Cialis. It usually occurs between 12 and 24 hours after taking Cialis. Usually, back pain goes away within 2 days of taking your dose. While taking Cialis, if you have back pain that’s bothersome to you or doesn’t go away, talk with your doctor.

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Your doctor may also do more testing to see what’s causing your back pain. Heartburn is a common side effect of Cialis. If you have heartburn that’s bothersome to you while taking Cialis, talk with your doctor. They may be able to recommend ways to treat this side effect. It’s possible to get a prolonged erection that lasts more than 4 hours while taking Cialis.

Alternative Treatment	Description	Pros	Cons
Home Remedies	Lifestyle changes, diet, exercise	Natural, no cost	Unproven effectiveness
Over-the-Counter Supplements	Some herbal or vitamin supplements claiming to aid ED	Easy to buy, no prescription needed	Lack of scientific proof, variable quality
Telehealth Consultations	Online doctor consultations delivering prescriptions	Convenient, regulated	May incur costs, requires some info
Other ED Medications	Viagra (sildenafil), Levitra (vardenafil)	Similar effectiveness	Prescription often required
Counseling or Therapy	Addressing psychological causes of ED	Long-term benefits	Time-consuming, requires professional help

This side effect can lead to priapism, which is a painful erection lasting longer than 4 hours. It’s considered an emergency because it can cause permanent damage to your penis, such as being unable to have erections at all. If you have an erection that lasts longer than 4 hours while using Cialis, see a doctor or go to the hospital right away. The prolonged erection should be treated as soon as possible so that it doesn’t cause lasting damage. The best way to take Cialis is to use it exactly as your doctor directs, either once a day at the same time each day or only as needed.

Buying Cialis Online in 2025: A Doctor’s Guide to Staying Safe

Call your doctor right away buy cheap cialis professional online if you have serious side effects. Call 911 if your symptoms feel life threatening or if you think you’re having a medical emergency. Changes in hearing can be a serious side effect of Cialis. Other serious side effects, explained in more detail below in “Side effect details,” include: prolonged erection (an erection that lasts more than 4 hours) You may wonder how often certain side effects occur with this drug. Here’s some detail on certain side effects this drug may cause. You should not take any other medications to treat erectile dysfunction (ED) while you’re using Cialis, unless your doctor says that it’s safe. And you should never take Cialis more than once a day.

Where to Get a Cialis Prescription Online in Denver

Note: It’s very important that you take only the amount of Cialis that your doctor instructs you to take. And be sure to speak with them if you feel you need more of the drug, rather than increasing your dosage yourself. Cialis can also be taken once a day to treat ED. In this case, the dosage usually starts at 2.5 mg a day. If this daily dosage doesn’t work well enough to treat your ED, your doctor may increase it to 5 mg a day.

How to avoid Cialis side effects

And if your doctor recommends using Cialis every day, you should take the drug at about the same time each day. You don’t need to take Cialis before sexual activity unless your doctor says you should take the drug only as needed. (See the “Cialis taken as needed” section right above to learn more.) Note: It’s very important that you take only the amount of Cialis that your doctor instructs you to take. To treat both ED and symptoms of BPH together, the typical dose of Cialis is 5 mg, once a day. You should try to take your dose at about the same time each day.

Overdose symptoms

The approved dosages of Cialis for ED, BPH symptoms, or both, are between 2.5 mg and 20 mg a day or as needed. Dosages higher than 20 mg a day haven’t been studied, and it’s not known what side effects may occur with them. For example, if you take your “as-needed” dose of 20 mg twice a day, you’ll end up taking 40 mg. This dose is too high and may cause serious side effects, such as decreased blood pressure. If you forget to take your once-a-day dose of Cialis, take it as soon as you remember. Taking Cialis more often than prescribed or in high doses can increase your risk of side effects. If you drink alcohol, it’s important to avoid drinking too much alcohol while you’re taking Cialis.

Why Choose Klinic for Your Cialis Needs

Mild side effects of Cialis can include:* Most of these side effects may go away within a few days or a couple of weeks. But if they become more severe or don’t go away, talk with your doctor or pharmacist. * This is a partial list of mild side effects from Cialis. To learn about other mild side effects, talk with your doctor or pharmacist, or see Cialis’s prescribing information. Serious side effects from Cialis aren’t common, but they can occur. (See the “Cialis and alcohol” section below to learn more.) In addition, be sure to talk with your doctor or pharmacist about any other medications that you’re taking.

• The onset of action for on-demand Cialis is typically 30-60 minutes.
• State and federal laws strictly control the distribution of prescription medications.
• There is no recourse if you receive damaged or incorrect products illegally.
• Non-arteritic anterior ischemic optic neuropathy (NAION) can cause vision loss.
• A doctor monitors for the rare but serious side effect of hearing loss.
• Pressure to buy quickly is a common sales tactic on illegitimate websites.
• Decreased blood pressure is a known effect, which can cause fainting.
• Reputable online clinics use secure portals for doctor-patient communication.
• The benefits of prescribed Cialis are proven through extensive clinical trials.
• Keeping medication out of reach of children is a standard safety precaution.

They’ll be able to determine whether the drugs may interact with Cialis and whether that may lead to an increased risk of side effects. If you have any questions about the best way to avoid specific side effects from Cialis, talk with your doctor.

Step	Description	Tips
Research the seller	Verify legitimacy and reviews	Use trusted online pharmacies
Start with low dose	Begin with 10mg to assess tolerance	Do not exceed recommended doses
Follow instructions carefully	Take at the same time as prescribed or advised	Avoid alcohol and certain medications
Monitor your body	Watch for side effects	Seek medical attention if serious symptoms occur
Keep emergency contacts	Have access to medical help in case of adverse reactions	Stay informed about side effects

Like Viagra, the drug vardenafil (Levitra) has uses similar to those of Cialis. Here’s a comparison of how Cialis and vardenafil are alike and different. Note: Levitra, the brand-name version of the generic drug vardenafil, is discontinued and no longer available. Vardenafil is a generic drug, which is an exact copy of the active ingredient in a brand-name medication (in this case, Levitra, which is discontinued). Both Cialis and vardenafil belong to a group of medications called phosphodiesterase 5 (PDE5) inhibitors.

Age Group	Expected Effects	Considerations	Notes
20-30 years	Rapid effect, effective	Usually fewer health issues	Generally healthy, low risk of side effects
40-50 years	Stable performance	Check heart health, blood pressure	Effectiveness may vary due to health factors
60+ years	Longer onset time	Higher risk of side effects, medication interactions	Consult with a healthcare provider
Over 70 years	Caution advised	Increased chance of cardiovascular issues	Medical consultation highly recommended

The Food and Drug Administration (FDA) has approved Cialis and vardenafil to treat erectile dysfunction (ED) in males. * ED is a condition in which you can’t get or keep an erection. Cialis is also FDA-approved to treat the following in males: symptoms of benign prostatic hyperplasia (BPH), a prostate condition that may cause problems with urination Use of the term “male” in this article refers to sex assigned at birth. Both Cialis and vardenafil come as tablets that you swallow. Cialis can be taken once a day or as needed for sexual activity. Vardenafil is taken only as needed for sexual activity.