Details of Drug Interaction

Details of Drug-Drug Interaction

 Drug General Information (ID: DDIILFMB46)
  Drug Name Verapamil Drug Info Levodopa Drug Info
  Drug Type Small molecule Small molecule
  Therapeutic Class Analgesics Dopaminergic Antiparkinsonism Agents
  Structure

 Mechanism of Verapamil-Levodopa Interaction (Severity Level: Moderate)
     Additive hypotensive effects Click to Show/Hide Mechanism Graph
Could Not Find 2D Structure
      Drug Name Verapamil Levodopa
      Mechanism 1 Antihypertensive agent
Voltage-gated calcium channel  Blocker 		Antihypertensive agent
      Key Mechanism Factor 1
Factor Name Voltage-dependent L-type calcium channel Structure Sequence
Protein Family Calcium channel beta subunit family
Protein Function
Regulatory subunit of L-type calcium channels (PubMed:1309651, PubMed:8107964, PubMed:15615847). Regulates the activity of L-type calcium channels that contain CACNA1A as pore-forming subunit (By similarity). Regulates the activity of L-type calcium channels that contain CACNA1C as pore-forming subunit and increases the presence of the channel complex at the cell membrane (PubMed:15615847). Required for functional expression L-type calcium channels that contain CACNA1D as pore-forming subunit (PubMed:1309651). Regulates the activity of L-type calcium channels that contain CACNA1B as pore-forming subunit (PubMed:8107964).
    Click to Show/Hide
      Mechanism Description
  • Additive hypotensive effects by the combination of Verapamil and Levodopa 
      Mechanism 2 Antihypertensive agent
Voltage-gated calcium channel  Blocker 		Hypotensive effects
      Key Mechanism Factor 2
Factor Name Voltage-dependent L-type calcium channel Structure Sequence
Protein Family Calcium channel beta subunit family
Protein Function
Regulatory subunit of L-type calcium channels (PubMed:1309651, PubMed:8107964, PubMed:15615847). Regulates the activity of L-type calcium channels that contain CACNA1A as pore-forming subunit (By similarity). Regulates the activity of L-type calcium channels that contain CACNA1C as pore-forming subunit and increases the presence of the channel complex at the cell membrane (PubMed:15615847). Required for functional expression L-type calcium channels that contain CACNA1D as pore-forming subunit (PubMed:1309651). Regulates the activity of L-type calcium channels that contain CACNA1B as pore-forming subunit (PubMed:8107964).
    Click to Show/Hide
      Mechanism Description
  • Additive hypotensive effects by the combination of Verapamil and Levodopa 

Recommended Action
      Management Hemodynamic responses should be monitored during coadministration, especially during the first few weeks of therapy. Dose adjustments of the antihypertensive agent may be required. Patients should be advised to notify their physician if they experience dizziness or syncope.

References
1 Bailey DG, Dresser GK "Natural products and adverse drug interactions." Can Med Assoc J 170 (2004): 1531-2. [PMID: 15136542]
2 Ho PC, Ghose K, Saville D, Wanwimolruk S "Effect of grapefruit juice on pharmacokinetics and pharmacodynamics of verapamil enantiomers in healthy volunteers." Eur J Clin Pharmacol 56 (2000): 693-8. [PMID: 11214778]
3 Product Information. Stalevo 150 (carbidopa/entacapone/levodopa). Novartis Pharmaceuticals, East Hanover, NJ.