HDL (high-density lipoprotein), or the "good" cholesterol, and LDL (low-density lipoprotein), or the "bad" cholesterol, are lipoproteins that carry cholesterol through the veins and arteries of the body. HDL and LDL combined, is your "total" blood cholesterol. The difference between the two are that high levels of the "good," or HDL cholesterol, may protect against narrowing of the blood vessels in the body, which protects you against heart attack, stroke, and other cardiovascular diseases. But high levels of LDL, or the "bad" cholesterol, may worsen the narrowing of the blood vessels in the body, which puts you at a greater risk of stroke, heart attack, and cardiovascular diseases, some of which are life threatening.
Riluzole is administered orally. Riluzole is highly bound to plasma protein (about 96%), mainly to albumin and lipoproteins. Hepatic metabolism is extensive, producing 6 major and a number of minor metabolites. The cytochrome P450 enzyme system is involved in hydroxylation and glucuronidation. The main isozyme involved in hydroxylation is CYP1A2. Approximately 90% of a dose is excreted in the urine; however, only 2% is excreted as unchanged drug. Elimination in the feces accounts for 5% of a dose. Riluzole is largely excreted as its glucuronide metabolites (85%). The elimination half-life is 12 hours.
Affected cytochrome P450 isoenzymes and drug transporters: CYP1A2
Riluzole is primarily metabolized by CYP1A2.
Ticlopidine is a thienopyridine which, when metabolized by the body, irreversibly blocks the P2Y12 component of the ADP receptor on the surface of platelets. Without ADP, fibrinogen does not bind to the platelet surface, preventing platelets from sticking to each other.  By interfering with platelet function, ticlopidine prevents clots from forming on the inside of blood vessels.  Anti-platelet effects start within 2 days and reach their maximum by 6 days of therapy. Ticlopidine’s effects persist for 3 days after discontinuing ticlopidine although it may take 1–2 weeks for platelet function to return to normal, as the medication affects platelets irreversibly. Therefore, new platelets must be formed before platelet function normalizes.