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What Is Clonidine Used for

Clonidine is a centrally acting antihypertensive drug, the active ingredient in many antihypertensive drugs. It is a selective agonist of the postsynaptic α2-adrenergic receptors of adrenergic neurons. It causes a decrease in the tone of the sympathetic nervous system. It does not affect the synthesis of catecholamines, but reduces the release of norepinephrine from nerve endings due to feedback upon stimulation of α2-adrenergic receptors. As a result of this action, the overall peripheral vascular resistance decreases, the heart rate and cardiac output decrease, which results in a decrease in blood pressure.

The peculiarity of this medicine is that, in addition to the central action, clonidine can act as an agonist of peripheral postsynaptic α1-adrenergic receptors of blood vessels, which in some cases of use of this drug appears as a slight increase in blood pressure at the beginning of treatment. This is the main drawback of this medicine.

Clonidine increases renal blood flow and slightly decreases cerebral blood flow. This medicine has the ability to lower intraocular pressure, which is why clonidine is available on the pharmaceutical market in the form of eye drops. In addition, clonidine has a sedative and analgesic effect, reduces the occurrence of opiate and alcohol withdrawal, as well as the feeling of unreasonable fear.

The main indications for the use of Clonidine include arterial hypertension, hypertensive crisis, and withdrawal symptoms. In case of withdrawal syndrome, it is recommended to use the medicine in a hospital setting with daily monitoring of blood pressure and pulse rate. For arterial hypertension, therapy is best started with low doses. During a hypertensive crisis, it is optimal to use the medicine sublingually for the fastest possible effect on the body. In addition, Clonidine is sometimes used in the treatment of anxiety disorders and insomnia.

Clonidine Side Effects

Side effects of Clonidine include various reactions, the incidence of which varies both in the general population and in individual patients.

With topical application of Clonidine, a decrease in the production of tear fluid, dry eyes, impaired accommodation, blurred vision, and burning in the eyes may be observed.

As for taking Clonidine in the most common form, namely in the form of film-coated tablets, dry nasal mucosa, nasal congestion, and breathing problems may be observed in the respiratory system, chest organs and mediastinum. Gastrointestinal side effects of Clonidine include dry mouth, decreased appetite, vomiting, nausea, salivary gland pain, mumps-like symptoms, decreased gastric acid secretion, abdominal pain, constipation, and mild transient liver function tests, in rare cases, hepatitis. Men often develop erectile dysfunction due to low blood pressure.

On the part of the nervous system, the body can react to taking Clonidine with dizziness, headache, depression, weakness, sleep disturbances, and both drowsiness and insomnia are possible. Increased fatigue, a slowdown in the speed of mental and motor reactions may be observed; paresthesia, disturbances of perception, hallucinations, delirium, nightmares, nervousness, confusion, tremor.

From the cardiovascular system, orthostatic hypotension, “hemitonic crisis” – a sharp short-term decrease in blood pressure followed by a sharp increase at the beginning of treatment, congestive heart failure, syncope, sinus bradycardia, arrhythmias, tachycardia, AV blockade, palpitation, Raynaud’s syndrome may be observed. (pallor, cold extremities). Cases of sinus bradycardia and AV block have been reported both with and without concomitant use of cardiac glycosides.

Thrombocytopenia may develop in the blood and lymphatic system (with long-term use).

On the part of the immune system, hypersensitivity reactions occasionally occur, including urticaria, angioedema.

From the musculoskeletal system and connective tissue, side effects such as periodic cramps of the calf muscles, myalgia, and arthralgia rarely develop.

Laboratory findings may show hyperglycemia, changes in liver function tests, increased serum creatine phosphokinase levels, and a weakly positive Coombs test.

Systemic effects include Na+ and water retention, manifested by swelling of the feet and legs, weight gain, fever, malaise, and increased sensitivity to alcohol.

Clonidine for Anxiety

In addition to its leading indication for high blood pressure, clonidine is also sometimes used for anxiety disorders such as generalized anxiety disorder or panic disorder. Clinical studies show that this drug is effective for both types of anxiety disorders and is superior to placebo. However, although clonidine may be effective in reducing the symptoms of anxiety disorders for some patients, in about a quarter of patients the drug causes a worsening of the condition: more frequent panic attacks and so-called psychiatric symptoms. Difficulties in interpreting the results may be explained by the postsynaptic effects of clonidine, which partially neutralize its presynaptic non-adrenergic effects.

As for short-term use, clonidine can be used to reduce preoperative anxiety in various categories of patients, including children. It is used primarily as an intranasal premedication. Clonidine is also often effective in the treatment of attention deficit hyperactivity disorder in children aged approximately three to nine years.

Clonidine 0.1mg

Clonidine 0.1 mg is the most common dosage of this medication in tablet form. Typically, this dosage is recommended for patients with mild to moderate hypertension three times a day. The absorption of the drug is high; after oral administration, the maximum concentration in the blood plasma occurs within one and a half to two hours. 0.1 mg is the recommended starting dosage for mild to moderate arterial hypertension when taken twice a day, especially in elderly patients who tolerate this drug less well than younger ones.

Clonidine Patch

Common people are accustomed to thinking that only painkillers of serious categories, such as narcotic analgesics, are produced in the form of patches. In fact, the situation is completely different. More and more drugs are appearing on the international pharmaceutical market that are produced in the form of transdermal patches, mainly matrix ones. In particular, the drug Clonidine is also available in a similar release form. Transdermal patches are very convenient for those patients who require long-term therapy for arterial hypertension and constant monitoring of blood pressure levels. The Clonidine patch ensures a continuous supply of the drug to the blood during the entire period the patch is on the patient’s skin. In most cases, the patches are intended to be worn for a week. Thus, they need to be changed once every seven days. They don’t even have to be taken off during water procedures.

Clonidine Drug Class

Clonidine belongs to centrally acting antihypertensive agents. In some other classifications it is also referred to as Alpha Blockers, Alpha2 Agonists, ADHD Agents. This is not an error but rather represents a more detailed description of the pharmacological class of the drug

Clonidine for Sleep

Clonidine as a sleeping pill primarily affects the human brain. It lowers blood pressure. Uncontrolled use to curb insomnia can provoke undesirable consequences. The official instructions for use don’t recommend the use of Clonidine as a means to improve sleep quality. However, sometimes doctors recommend this medicine to those patients for whom classical sleeping pills are ineffective, for example, in cases where there is a malfunction of a person’s biological clock – for example, after working for a long time at night or during the day. Clonidine helps fight nightmares during sleep, especially if, upon awakening, patients experience an unreasonable feeling of fear or an attack of aggression. However, the medicine does not have a positive effect on all patients. Some people, on the contrary, after taking it feel lethargic, tired, and irritable.

Why Is Clonidine Bad

Clonidine has a number of disadvantages and application features that make this medication not suitable for all patients. It is impossible to say unequivocally that clonidine is a bad drug, but it would be wrong to remain silent about a number of its features.

First of all, long-term use of Clonidine is addictive. It has both physiological and psychological manifestations, although in general it is not severe. With sudden withdrawal (withdrawal syndrome), arterial hypertension, angina pectoris, anxiety or tension, nervousness, headache, hypersalivation, nausea, vomiting, palpitations, trembling of hands and fingers, sweating, stomach cramps, and sleep disturbances may develop. Abrupt withdrawal of Clonidine is also fraught with cases of hypertensive encephalopathy, cerebrovascular accident and death. The likelihood of such a reaction to discontinuation of therapy increases with high doses or with continued concomitant beta-blocker therapy, so special caution is recommended in such cases.

Patients should be warned that the sedative effect of Clonidine is enhanced by the concomitant use of barbiturates or other sedative drugs. Clonidine is often used for criminal purposes due to the fact that when it is added to drinks, especially alcoholic ones, the person who drinks such a drink can lose consciousness as a result of hypotension. In this case, a severe overdose of the drug can lead to death. In addition, during treatment with clonidine, it is prohibited to drink alcoholic beverages.

Clonidine should be prescribed with caution to patients with diabetes mellitus, as this medicine may mask the symptoms of hypoglycemia and reduce insulin secretion.

The use of Clonidine can lead to a decrease and suppression of salivation, which contributes to the development of caries, periodontal disease and oral candidiasis.

Buy Clonidine Online

The question where can I buy Clonidine has many answers. First of all, you can buy Clonidine at your regular local pharmacy. This is a more than common medicine, and you can find it in almost any country in the world, no matter where you are. However, there is a slight catch. As a rule, at least in Europe and the USA, this medicine is sold strictly according to a doctor’s prescription. You can also buy Clonidine online. In this case, the patient has access to a huge range of generics of this medicine in a variety of dosages from different manufacturers.

Buying Clonidine online allows you to save quite a lot of money, especially if the medicine must be taken on an ongoing basis. In addition, online pharmacies offer a larger selection of dosages and forms of release of this medication, including tablets dissolving in the mouth.

Buy Clonidine without Prescription

You can buy Сlonidine without a doctor’s prescription first by contacting online pharmacies registered in countries that don’t have strict requirements for compliance with pharmaceutical legislation. These include, first of all, India, a famous supplier of a huge number of generics of almost all medicines existing today. However, it is important to remember that Clonidine is not a harmless medicine; it is advisable to take it only on the recommendation of a doctor and carefully follow the instructions. Otherwise, you may experience severe side effects or even death due to a dramatic decrease in blood pressure. When buying Clonidine over the counter, don’t forget about your safety and make sure that you have no contraindications to taking this medicine.