Drilldown: Medicines

Dexmethylphenidate (1) · Linagliptin (1) · Memantine ER / Donepezil (1) · Sildenafil (1) · Sitagliptin (1)

Focalin, Focalin XR (1) · Januvia; with metformin Janumet/Janumet XR (1) · Namzaric (1) · Tradjenta; with metformin Jentadueto (1) · Viagra, Revatio (1)

CNS stimulant (1) · Combined cholinesterase inhibitor + NMDA antagonist (1) · NDRI (1) · PDE5 Inhibitor (1) · Psychostimulant (1) · [[:Category:Antihyperglycemic_agents|Antihyperglycemic agent]] (2) · [[:Category:DPP-4_inhibitors|DPP-4 inhibitor]] (2) · [[:Category:Incretin_modulators|Incretin pathway modulator]] (2)

None (1) · Donepezil: reversible AChE inhibitor, increases synaptic acetylcholine. Memantine: uncompetitive low-affinity NMDA receptor antagonist, dampens pathological glutamate overactivation while preserving normal synaptic signaling. Targets two distinct mechanisms in Alzheimer's. (1) · Norepinephrine–dopamine reuptake inhibition (DAT, NET), d-threo enantiomer of methylphenidate (1) · Selective inhibitor of phosphodiesterase type 5 (PDE5), preventing cGMP breakdown in vascular smooth muscle. In the corpus cavernosum, potentiates the NO/cGMP cascade triggered by sexual stimulation. (1) · '"`UNIQ--vote-00000762-QINU`"' Largely renally cleared, hence the eGFR-tiered dosing. Rare but well-documented signals: acute pancreatitis (uncertain causal contribution), severe joint pain, and bullous pemphigoid (class effect, especially in older Asian patients)'"`UNIQ--ref-00000763-QINU`"'. (1)

'"`UNIQ--vote-00000150-QINU`"', '"`UNIQ--vote-00000151-QINU`"' (1) · '"`UNIQ--vote-00000468-QINU`"' (1) · '"`UNIQ--vote-00000705-QINU`"', '"`UNIQ--vote-00000706-QINU`"' (1) · '"`UNIQ--vote-00000764-QINU`"' (1) · '"`UNIQ--vote-0000117B-QINU`"' (1)

None (1) · 100 mg PO once daily (50 mg if CrCl 30-44; 25 mg if <30 or dialysis) (1) · 5 mg PO once daily (no renal dose adjustment, unlike sitagliptin) (1) · 50 mg ~1 h before sexual activity (ED); 20 mg TID (PAH) (1) · For patients already stable on memantine 28 mg/d + donepezil 10 mg/d, switch to one capsule daily of equivalent strength (1)

None (1) · 25, 50, 100 mg tablets; combination tablets with metformin (1) · 25, 50, 100 mg tabs (Viagra); 20 mg tabs and 10 mg/mL oral suspension (Revatio) (1) · 5 mg tablets; combination with metformin (1) · 7/10, 14/10, 21/10, 28/10 mg ER capsules (memantine ER / donepezil) (1)

None (1) · 100 mg/d (1) · 100 mg/d (ED); 20 mg TID (PAH) (1) · 28/10 mg/d (1) · 5 mg/d (1)

IV (Revatio) (1) · Oral (4) · Oral (capsule whole or opened/sprinkled on applesauce) (1)

None · Hours · 30-60 minutes · 1-2 hours · ~30 min · LDL lowering at 2 weeks, max by 4 weeks · ~1 hour · 15-30 minutes · 15–30 min · 1–2 h · 30–60 min · Antidepressant effect emerges over 1-2 weeks · BP and symptomatic LUTS improvement within 1-2 weeks · BP effect within 1-2 weeks · Clinical improvement within 24-72 hours · Days · Motor improvement over days at therapeutic dose · Over weeks · Postprandial glucose effect within days; HbA1c by 12 weeks · Sleep effect from first dose; antidepressant effect over 1-4 weeks

Other values:

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24 h (1) · 24 hours (2) · IR 4–6 h; XR 8–12 h (1) · ~4 h (1)

2.2 h (IR parent); ~3 h (XR parent) (1) · ~12 hours (effective); terminal much longer'"`UNIQ--ref-0000117C-QINU`"' (1) · ~12.4 hours'"`UNIQ--ref-00000765-QINU`"' (1) · ~4 h (1) · ~60–80 h (memantine); ~70 h (donepezil) (1)

~100% both components (1) · ~22–25% (1) · ~30% (oral)'"`UNIQ--ref-0000117D-QINU`"' (1) · ~40% (1) · ~87% (oral)'"`UNIQ--ref-00000766-QINU`"' (1)

Category B (1) · Category C (1) · Limited data; switch to insulin where feasible.<sup class="pcp-cn" title="This claim needs a citation.">&#91;[[Pharmacopedia:Citation needed|citation&nbsp;needed]]&#93;</sup> (2) · Not relevant (geriatric problem) (1)

Rx-only in US (2) · Schedule II (1) · [[USLegal:Prescription only|Rx-only]] in US (2)