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Rilmenidine is a prescription medication for the treatment of hypertension.

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Rimonabant is an anorectic antiobesity drug that has been withdrawn from the market. It is an inverse agonist for the cannabinoid receptor CB1. Its main effect is reduction in appetite.

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Risedronate Sodium

Risedronate Sodium is a pyridinyl bisphosphonate which inhibits bone resorption and is used either alone or with calcium for the prevention and treatment of postmenopausal osteoporosis.It is a potent antiresorptive agent that does not affect bone mineralization.It is one of the most potent antiresorptive bisphosphonates.

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Risperidone is a second generation or atypical antipsychotic. It is used to treat schizophrenia (including adolescent schizophrenia), schizoaffective disorder, the mixed and manic states associated with bipolar disorder, and irritability in people with autism. It is associated with significant weight gain and metabolic problems, as well as tardive dyskinesia and neuroleptic malignant syndrome. Risperidone and other antipsychotics also increase the risk of death in patients with dementia.The drug was developed by Janssen-Cilag and first released in 1994.

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Ritodrine is a tocolytic drug, used to stop premature labor. It is a beta-2 adrenergic receptor agonist.

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Rituximab is a chimeric monoclonal antibody against the protein CD20, which is primarily found on the surface of immune system B cells. Rituximab destroys B cells and is therefore used to treat diseases which are characterized by excessive numbers of B cells, overactive B cells, or dysfunctional B cells. Rituximab is used to treat cancers of the white blood system such as leukemias and lymphomas, including Hodgkin's lymphoma and its lymphocyte predominant subtype.

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Rivaroxaban is an oral anticoagulant.It is the first available orally active direct factor Xa inhibitor. Rivaroxaban is well absorbed from the gut and maximum inhibition of factor Xa occurs four hours after a dose.Rivaroxaban is an oxazolidinone derivative optimized for inhibiting both free Factor Xa and Factor Xa bound in the prothrombinase complex. It is a highly selective direct Factor Xa inhibitor with oral bioavailability and rapid onset of action.Rivaroxaban has predictable pharmacokinetics across a wide spectrum of patients (age, gender, weight, race) and has a flat dose response across an eightfold dose range (5-40 mg). Rivaroxaban bears a striking structural similarity to the antibiotic linezolid: both drugs share the same oxazolidinone-derived core structure.

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Rivastigmine is a parasympathomimetic or cholinergic agent for the treatment of mild to moderate dementia of the Alzheimer’s type and dementia due to Parkinson's disease.It is a cholinesterase inhibitor that inhibits both butyrylcholinesterase and acetylcholinesterase.Rivastigmine is also used to treat dementia in people with Parkinson's disease.It improves mental function (such as memory and thinking) by increasing the amount of a certain natural substance in the brain.

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Rivastigmine Tartrate

It is commonly referred to in the pharmacological literature as SDZ ENA 713 or ENA 713. Rivastigmine Tartrate is a reversible cholinesterase inhibitor. Rivastigmine Tartrate is a cholinergic agent used for the treatment of mild to moderate dementia of the Alzheimer’s type and dementia associated with Parkinson's disease. It works by inhibiting cholinesterase enzymes and increases the level and duration of action of the acetylcholine neurotransmitters which helps to improve symptoms of dementia.

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Rizatriptan is a 5-HT1 agonist triptan drug developed by Merck & Co. for the treatment of migraine headaches. It is used to treat acute migraine attacks. Rizatriptan is in a class of medications called selective serotonin receptor agonists. It works by narrowing blood vessels in the brain, stopping pain signals from being sent to the brain, and stopping the release of certain natural substances that cause pain, nausea, and other symptoms of migraine. It does not prevent future migraine attacks.

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