PART-3-RHEUMATOID ARTHRITIS

RHEUMATOID ARTHRITIS-Contd...

Second Line Drugs

Unlike drugs like aspirin and NSAIDs which are considered as fast-acting and first-line drugs these drugs are said to be slow-acting anti-rheumatic drugs(SAARD) or disease-modifying anti-rheumatic drugs (DMARDs).

When a patient suffers from sustained disabilities with RA only an anti-inflammatory course is not sufficient. The course of the disease should be modified to ease the disability. This is possible with second-line drugs like hydroxychloroquine, methotrexate, gold compounds, penicillamine, and sulfasalazine. These drugs are used as an adjuvant along with the anti-inflammatory treatments. 

These drugs are acting by delaying or modifying the development of the disease. Therapeutic effects may take several months. Careful monitoring of the patients must be necessary because of the serious side effects.

In general these drugs are used along with anti-inflammatory drugs. But some doctors may initiate with these drugs alone and interchange them if they found one drug is ineffective. The ineffective drug should be discontinued before changing to other drugs.Initiating a second-line drug is possible if the patient is not tolerating anti-inflammatory drugs and their prolonged may result in some possible side effects. Yet these drugs too show potential side effects.

1.Hydroxychloroquine

 

The dosage is started with 200mg twice daily (400mg/day) or 6.5mg/kg whichever is less. It is possible as per the condition the daily dose can be reduced to 200mg once daily.

The patients should be taking care of the following side effects:-

1. Nausea and epigastric pain is possible but not seriously

2. Rare effects on eyes, skin, CNS, and bonemarrow are possible on the recommended dosage

3. Hydroxychloroquine causes retinal damage and hence visual checkup is recommended every 3 to 6 months by an eye specialist.

It is highly advisable to discontinue the medicine if the first sign of the retinal damage is notified.

4. Corneal damages can be reversible but the retinopathy is irreversible.

2.Methotrexate

As methotrexate acts faster than other second-line drugs some physicians are considering it as a first-line drug yet it is somehow slower than anti-inflammatory drugs.

Methotrexate is a folic acid antagonist and is used in many neoplastic disease treatments.

The initial weekly doses are 5 to 10 mg. This can be divided as twice-daily doses but is not safer and much beneficial.

The dosage can be slowly increased to 15 to 20 mg every 3 to 6 weeks. 

Intramuscular dosage also available if the oral route is ineffective or may produce gastric trouble.I.M.dosage is once per month.

The following precautions must be taken:-

Aspirin may increase the toxicity of methotrexate by delaying its excretion. Hence aspirin should not be used with it.

Adverse Effects

1. Gastric effects like nausea, anorexia, stomach cramps, and ulcers)

2.Bone marrow suppressions

3.Liver damage

4. Hypersensitivity reactions lead to pneumonitis

5. Rarely pneumonia and chickenpox may precipitate as the drug is immunosuppressive.

6.Monitor RBC, WBC, and platelet counts.

3.Gold Compounds

 

Gold compounds are proved as very effective second-line drugs in relieving RA by delay progressions of joint erosions.

a)Gold Sodiumthiomalate i.m.injection

b)Aurothioglucose i.m.injection

A test dose of 10mg is given followed by 25mg of the initial weekly dose for two weeks.

After that the dose can be increased to 50mg per week for 20 weeks can be given.

Once there is an expected effect occur the treatment should be continued with the same 50 mg dosage with 2 weeks intervals followed by every three weeks and then to reach every month for 3 to 6 months.

The treatments should continue as a monthly therapy. Abrupt discontinue of the treatment may result in a relapse of RA which may not respond again to gold therapy.

Side Effects

1.Proteinuria

2.Blood dyscrasias

3.Rashes

4.Leucopenia

5.Thrombocytopenia

6.Aplastic anemia

7.Anaphylaxis

8.Angioneurotic edema

9.Glossitis

10.Interstitial pneumonitis

11. Gold Sodium thiomalate because of its water solubility can produce vasodilation, hypotension, and syncope. These effects do not occur with aurothioglucose which is fat-soluble.

c)Auranofin(Oral)

This drug is orally active, less effective, and less toxic.

The initial dose is 3 mg twice a day or 6 mg once a day for six months.

If no effect the dose can be increased to 3 mg three times daily or 9 mg once daily.

Still there is no effect reached auranofin should be discontinued.

Side Effects

1.Diarrhea, stomach pain usually reversible

2. Rash and stomatitis also reversible

3. Proteinuria also reversible

4.Rarely bone marrow suppression and renal toxicity.

4.Sulphasalazine

 

Sulphasalazine is a sulphonamide derivative used as an anti-RA drug widely in many countries.

It is a very effective drug

It slows the progression of joint damage

It can be given orally.

The dose is 0.5mg twice daily.

The dose is slowly increased by 0.5mg every week up to 2 to 3 gram /day in divided doses.

Side Effects

1.G.I.Distress

2.Blood dyscrasias (Rare)

3.Hepatitis (Rare)

PARTVII-FREE E-BOOK-THE BRAIN WORKSHOP

THE BRAIN WORKSHOP

The brain is the head of the department our body and is the IT head call center of our body.

Ever functions of our body are at the sole discrete decision of our brain empire.

The Central Nervous System which is branched into numerous networks spread throughout the body. Even the Autonomic Nervous System and the Somatic(skeletal muscle) Nervous System which serves as Peripheral Nervous networks too are in some way connected with the Brain Kingdom.

If the brain dies everything will stop and our eternal life starts.

PART-2-RHEUMATOID ARTHRITIS

RHEUMATOID-DIAGNOSIS AND THERAPY

 RA

Generally it is very difficult to diagnose RA at the early stages as it is mostly asymptomatic in the beginning.

RA diagnoses are based on their symptoms and laboratory findings as follows.

Diagnoses

 

1. Joint symptoms such as swelling, abnormal fluid collections in articular cavities, synovial thickening, and edema with pain on motion, indicates the presence of RA.

2. Subcutaneous nodules mostly occur in the sites exposed to external pressure such as elbow, shoulder, and wrist but also in other organs indicates the presence of RA. These nodules are rubbery, round, and firm masses can be identified with fingers.

3. A deeper diagnosis by X-radiation can indicate the presence of asymptomatic early RA by the presence of mild painless soft tissue swellings.

4. A blood test can show the presence of RA factors, heterogeneous antibodies present in most RA patients. 

5.ESR test may be high which indicates the presence of early RA.

6. The presence of normochromic, normocytic anemia may indicate the presence of RA.

Treatments

 

The treatments involve two methodological approaches such as Mechanical and Pharmacological.

Mechanical Methods

The patient should be trained with proper balanced daily exercises and rests as follows:-

1. In the beginning start with how to keep the joints in rest.

2. Start the exercise by step by step movements of the joints without straining them to strengthen the muscles.

3.when return to sleep train how to keep the joints by aligning them by the use of specially designed lightweight splints.

4. Complete immobilization should be avoided.

5. When the above methods fail a mild surgery to improve the functions and movements of hands and knees are advised.

Pharmacological Methods 

Analgesics and anti-inflammatory drugs such as aspirin and NSAIDs are beneficial. Paracetamol has not been used as it is not having any anti-inflammatory effects.

Anti-inflammatory drugs at their therapeutic dosage are riskier and the risk factors override the required therapeutic response.

Aspirin

We have already dealt with this drug in detail in another post (9-12-2015) in the same blog under the heading "Paracetamol, Aspirin and other NSAIDs".Please download it.

A piece of additional information is aspirin is the first-line drug to treat rheumatism. Aspirin is used in higher dosage to treat inflammation and it is more economical. But its risk factor overrides its benefits.

Mechanism

Aspirin is acting similar to other NSAIDs but to a lesser extent it is preventing the synthesis and release of prostaglandin.

Dose

4 to 6 gms daily

For side effects please refer to the post "Paracetamol, Aspirin, and Other NSAIDs" in this blog.

Other NSAIDs:-

They are ibuprofen, naproxen, sulindac, and piroxicam. Please refer to the following table.

Actions are similar to aspirin by inhibiting cyclooxygenase 1 and 2 and thereby inhibiting the synthesis and release of prostaglandin.

NSAIDs have the advantage over aspirin by producing the required effects in a much lower dosage than aspirin but are more expensive.

Special Precautions

1. They should be avoided in asthmatic patients as they can elevate bronchospasm. Aspirin is suitable for them.

2. Unlike aspirin NSAIDs reversibly affect the platelet function, hence safer than aspirin but still should be cautious in using them to those who have gastric bleeding.

Misoprostol is used to treat gastric hemorrhages caused by NSAIDs.(Misoprostol dosage:100 to 200 mcg four times daily along with NSAIDs treatment)

3.NSAIDs decrease the renal blood flow and renal failure may ensue in patients who already suffer from less renal flow due to CHF and Diuretic therapy. Sulindac is safer.

4.Liver failure

5.CNS effects such as drowsiness, dizziness, anxiety, tinnitus, and confusion, that disappear on continuous use. Headache is more common with indomethacin

6.Blood dyscrasias(Rare)

7. Naproxen and ibuprofen are safer than other NSAIDs in producing GI effects

Nabumetone causes lesser gastric irritation

Meclofenamate and Mefenamic acid may cause severe diarrhea

Piroxicam which has a longer duration of action may cause higher gastric bleeding. It should be avoided in elderly patients.

Indomethacin can cause more serious CNS effects than other NSAIDs.

Nonacetylated salicylates such as salsalate, choline salicylate are safer than aspirin in aspirin-sensitive patients as they do not have respiratory effects similar to aspirin.

RHEMATOID ARTHRITIS-PART-1

RHEUMATOID ARTHRITIS

Rheumatoid arthritis is an inflammatory chronic and systemic disease most apparently involved in the synovial joints. The inflammation can spread over extra-articular tendons and organ structures.

Criteria 

There are many criteria as follows:-

1.Morning Stiffness

Morning stiffness in any part of our body might have been experienced by somebody else especially at the knees or the feet. This may last for at least one hour.

2.Joints Swelling

At least three joints must have been experiencing swelling with fluid. The possible areas are the wrist, elbow, knee, ankle, and phalangeal (Hand and Feet Fingers) joints.

3.At least One Joint Area

At least one joint area in the hand such as the wrist, metacarpophalangeal(MCP), or proximal interphalangeal(PIP)

4.Symmetric

Simultaneous experience of arthritis in the bone joints at both sides of the body.

5.Subcutaneous Nodules(Rheumatoid nodules)

These nodules must be observed over bony prominences, extensor surfaces, or in juxta-articular regions by a physician.

6.Abnormal Presence Of Serum Rheumatoid Factor

It should be observed by a physician by any methodology

7.Radiological Changes

Bony erosions or decalcifications must be present in the hand or wrist x-ray.

Rheumatoid Arthritis (RA) is more common in women than men with a ratio of 3:1 respectively.

Occurrence

In general, the occurrence is rare (1 to 3%) in early ages, and medial at 30 to 40 years and more common at above 40 years. 

Etiological Factors

Although it is still not knowing the exact reasons yet the following might have been observed as the etiological factors.

1. A specific leukocyte antigen is often involving some inflammatory reaction if the individual is exposed to certain environment.75% whites have this antigen while 30% from the rest of the population is suffering from RA.

2. Some infectious diseases may also be as factors to precipitate RA.

Symptoms

1.Synovial swellings with inflammation, with fluid collection and edema. If left untreated the RA becomes chronic and the synovium becomes thick and boggy.

2. The thickened synovium grow inward across the cartilage results in cartilage degradation, loss of adjacent bone, and erosions.

3. The pain will produce by rub and press.

 

 

NEWS UPDATE-AGE NO BAR TO HIP SURGERY

AGE NO BAR FOR BONE SURGERIES

The news is very pleasant and induces hopes to the life expectancy of old aged people.

As the age increase the bones get weakened and more brittle.

Osteoporosis is more common in old aged people and is a hurdle to make a surgery to repair a broken hip in that age.

But now the news said regional anesthesia, better pain management, and implanting uncemented surgical parts make the procedure less risky.

There are two methods of hip repairs.1. Total hip replacement in which the whole hip bones and the ball are replaced.2.Hemiarthroplasty in which only the ball is replaced.

The first one is more complicated than the second one and holds more life expectancy.

Both can be possible at an old age but the most preferable one is hemiarthroplasty.

PART-IV-ECZEMA AND ITS CURE

ECZEMA-TREATMENTS

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You can use this book to develop your fundamental medical knowledge regarding eczema and you can use this knowledge for giving presentations, delivering speeches, and debates in various medical events.

This book is very useful for medical and paramedical professionals, pharmacists, and those who are related to the medical and pharmaceutical trading and business.

To own your free copy please click the following image and follow the instructions. Thanking You.

 ECZEMA

PART-IX-CNS-STIMULANTS-Contd..-AMPHETAMINES

AMPHETAMINES

Amphetamines are central stimulants but they are frequently used as drugs of abuse. This we will see in a separate article in the other blog 'MAS PHARMACY AND HEALTH REVIEW'

Amphetamine is generally an equal mixture of the two enantiomers the Levo and dextro amphetamines

Further amphetamines are available in the market as follows:-

1.Methylamphetamine (Ritalin)

2.Methamphetamine (Methedrine or 'speed')

3.Dextroamphetamine (Dexedrine)

4.MDMA ('ecstasy')-Methylene Dioxy Meth Amphetamine

5.Bupropion

Amphetamines are chemically a derivative of the endogenous phenylethylamine.

Mechanism

Amphetamines are powerful central stimulants work by releasing norepinephrine and dopamine from their storage.

Physiology

Amphetamines by stimulating CNS through the release of catecholamines they mainly affect sleep centers of the hypothalamus which regulates the sleep cycles.

1. Amphetamine causes euphoria to the individuals who are addict to it. Euphoria is a kind of daydream or imagination of impossible thoughts associated with belief and confidence.

2. CNS stimulation reduces tiredness and fatigue, improves alertness, and cognitive ability.

3. Elevate B.P-Hypertension.

4.Elevate breathing

5. Blunts hungry.

6. Amphetamine is an aphrodisiac, a drug that stimulates sexual desire.

Clinical Use

1.To improve sleep disorders(Anti-Narcoleptic)

2.Attention Deficit Hyperactivity Disorders(ADHD) 

3.Appetite Control.

Route Of Administration

Oral

Metabolism and Kinetics

Amphetamine is well absorbed orally and 75 % is bioavailable in case of dextroamphetamine.

Amphetamine is a weak base with a pH of 9.9 and in the alkaline gut, it easily gets dissociated into the highly lipid-soluble free base and easily absorbed by the fatty gut villus.

15 to 40% are absorbed by the plasma proteins

Amphetamine is metabolized in the liver and excreted in the urine.

Amphetamine is eliminated by the body within two days of the last dosage taken.

Elimination is increased and the half-life is decreased by acid diets and vice versa.

Contraindication

Amphetamine should not be taken by those who are using MAOIs for their mobility disorders. Because MAO should not be inhibited any way if amphetamine is in usage as amphetamine is acting by releasing catecholamines from their stores which are metabolized by MAO. Inhibiting MAO will result in an excessive adrenergic crisis.

Adrenergic Crisis Treatments

Chlorpromazine a neuroleptic is the drug of choice to neutralize amphetamine poisoning as it effectively blocks the alpha-adrenergic receptors which are responsible for CNS disturbances and hypertension.