Selegiline + Trimethoprim-Sulfamethoxazole

SAFE — No Known Interaction

🟢 SAFE — Trimethoprim-Sulfamethoxazole and Selegiline can be taken together safely.

Evidence level: MODERATE

What this interaction means

Trimethoprim-Sulfamethoxazole and Selegiline are generally considered safe to use together. No adverse interactions have been reported in medical literature.

How it works (mechanism)

No clinically significant interaction between Trimethoprim-Sulfamethoxazole and Selegiline has been identified in medical literature.

Practical advice

No interaction documented between Trimethoprim-Sulfamethoxazole and Selegiline. Always inform your healthcare provider about everything you take.

Timing

Follow each medication's specific timing instructions. Trimethoprim-Sulfamethoxazole — check if it requires an empty stomach or should be taken with food. Selegiline follows its normal schedule. Complete the full antibiotic course as prescribed.

Risk factors

Higher risk for: those with liver or renal impairment, elderly, concurrent use of nephrotoxic or hepatotoxic drugs, history of C. difficile infection, or those on narrow therapeutic index medications (warfarin, digoxin).

Symptoms to watch for

Monitor for altered effectiveness and side effects when combining Trimethoprim-Sulfamethoxazole with Selegiline. Antibiotics can affect liver enzymes and alter the blood levels of other medications. Watch for: unusual nausea, vomiting, diarrhea (especially watery or bloody), stomach cramps, skin rash, dizziness, or signs the other medication is working differently than usual. When to seek emergency help: Severe allergic reaction (difficulty breathing, swelling of face/throat, hives), severe or persistent diarrhea (possible C. difficile infection), yellowing of skin or eyes, dark urine, or irregular heartbeat. Complete the full antibiotic course as prescribed.

What to tell your doctor

No urgent discussion needed, but keep your provider informed. Say: "I take Trimethoprim-Sulfamethoxazole alongside Selegiline — anything I should know?"

Safer alternatives

These medications are safe to take together at standard doses. Continue taking as prescribed and keep your pharmacist informed of your complete medication list.

Frequently asked questions

Can I take Selegiline and Trimethoprim-Sulfamethoxazole together?

Trimethoprim-Sulfamethoxazole and Selegiline are generally considered safe to use together. No adverse interactions have been reported in medical literature.

When should I take Selegiline vs Trimethoprim-Sulfamethoxazole?

Follow each medication's specific timing instructions. Trimethoprim-Sulfamethoxazole — check if it requires an empty stomach or should be taken with food. Selegiline follows its normal schedule. Complete the full antibiotic course as prescribed.

What symptoms should I watch for if I combine Selegiline and Trimethoprim-Sulfamethoxazole?

Monitor for altered effectiveness and side effects when combining Trimethoprim-Sulfamethoxazole with Selegiline. Antibiotics can affect liver enzymes and alter the blood levels of other medications. Watch for: unusual nausea, vomiting, diarrhea (especially watery or bloody), stomach cramps, skin rash, dizziness, or signs the other medication is working differently than usual. When to seek emergency help: Severe allergic reaction (difficulty breathing, swelling of face/throat, hives), severe or persistent diarrhea (possible C. difficile infection), yellowing of skin or eyes, dark urine, or irregular heartbeat. Complete the full antibiotic course as prescribed.

Are there safer alternatives to combining Selegiline with Trimethoprim-Sulfamethoxazole?

These medications are safe to take together at standard doses. Continue taking as prescribed and keep your pharmacist informed of your complete medication list.

What should I tell my doctor about taking Selegiline and Trimethoprim-Sulfamethoxazole?

No urgent discussion needed, but keep your provider informed. Say: "I take Trimethoprim-Sulfamethoxazole alongside Selegiline — anything I should know?"

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