Medicines Used in Hemiparesis (Right-sided)

1. Treating the underlying cause (acute stroke management)
2. Secondary prevention (stopping recurrence)
3. Managing spasticity and motor complications
4. DVT prophylaxis and supportive medications

1. Acute Ischemic Stroke (Most Common Cause)

Thrombolysis

Contraindicated if hemorrhagic stroke, recent surgery, or bleeding risk - Bradley and Daroff's Neurology in Clinical Practice

Endovascular Therapy

• Mechanical thrombectomy (clot retrieval) - for large vessel occlusion, up to 6-24 hours window. Not a drug, but the most effective intervention.

Blood Pressure Management (Acute Phase)

• Optimal SBP: 160-200 mmHg in acute phase (lower BP can worsen ischemia)
• IV Labetalol (10 mg over 1-2 min, repeated as needed) - if urgent BP lowering is required, e.g., before thrombolysis
• Nicardipine IV infusion - alternative for BP control

Cerebral Edema

• Mannitol (20%) - osmotic agent for raised intracranial pressure
• Hypertonic saline - alternative hyperosmolar therapy

2. Secondary Prevention (Antiplatelet & Anticoagulant)

Antiplatelet Therapy (for non-cardioembolic stroke)

Anticoagulants (for cardioembolic stroke - e.g., atrial fibrillation)

Goldman-Cecil Medicine: "Short-term dual antiplatelet therapy with aspirin and clopidogrel may be better than aspirin in reducing stroke, MI, or death at 90 days"

Statins

• Atorvastatin 40-80 mg, Rosuvastatin - reduce risk of recurrent stroke via plaque stabilization and lipid lowering; started early after ischemic stroke

Antihypertensives (long-term)

• ACE inhibitors (Ramipril, Perindopril) or ARBs - first-line for BP control post-stroke
• Thiazide diuretics - often combined with ACE inhibitors

3. Spasticity (Post-Stroke Complication of Hemiparesis)

Ganong's Physiology: "Tizanidine, a centrally acting alpha-2 adrenoceptor agonist, increases presynaptic inhibition of spinal motor neurons. Botulinum toxin is also approved for spasticity" Miller's Orthopaedics: "Botulinum toxin A is transiently effective (3-6 months) and may be used periodically for severe spasticity"

4. DVT Prophylaxis (Hemiparetic Limb at High Risk)

• Low-dose UFH (unfractionated heparin) 5000 units SC twice daily
• Enoxaparin (LMWH) 40 mg SC once daily - the PREVAIL study showed enoxaparin superior to UFH for VTE prevention in acute ischemic stroke
• Intermittent pneumatic compression (IPC) - if anticoagulants contraindicated

5. Supportive / Symptomatic Medicines

Summary by Phase

Medicines to Enhance Right-Sided Function in Hemiparesis

Category 1 - Spasticity-Reducing Drugs (Unlock Movement)

Oral Agents

Local/Targeted Agents (Most Effective for Focal Spasticity)

A 2025 meta-analysis (PMID: 40296821) confirmed Botulinum Toxin A significantly reduces hemiplegic shoulder pain and improves function.

• Right arm: shoulder adduction, elbow flexion, wrist/finger flexion → inject biceps, wrist flexors, finger flexors
• Right leg: equinovarus foot, knee extension spasticity → inject gastrocnemius, tibialis posterior

Category 2 - Neurostimulatory/Neuroplasticity-Enhancing Drugs

SSRIs - Strongest Current Evidence

Note: The later FOCUS trial (2019) showed fluoxetine did not significantly improve functional outcome at 6 months, raising questions about long-term benefit. Use is still considered in early post-stroke phase and for depression.

Dopaminergic Agents

Adrenergic Agents

Cholinergic Enhancement

Category 3 - Drugs That Treat Conditions Blocking Recovery

Category 4 - Drugs Under Investigation / Emerging

Summary: Most Practical Drug Plan for Right-Sided Hemiparesis Recovery

PHASE 1 (Acute, 0-4 weeks):
├── Alteplase (if eligible) → limit damage
├── Aspirin + Statin → prevent recurrence
├── Fluoxetine 20 mg → start early for motor + mood
└── DVT prophylaxis (Enoxaparin)

PHASE 2 (Subacute, 1-3 months):
├── Botulinum Toxin A → focal spasticity in right arm/leg
├── Baclofen or Tizanidine → oral spasticity control
├── Levodopa/Carbidopa → paired with physiotherapy
└── Treat pain: Gabapentin or Amitriptyline

PHASE 3 (Chronic, >3 months):
├── Continue antispastics
├── Botulinum toxin repeat injections
├── Continued SSRI for mood and neuroplasticity
└── Donepezil if cognitive-motor overlap