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Interaction Check

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Selected Drugs Clear All

  • remove Phrenilin Forte
    butalbital/ acetaminophen
  • remove Quasense
    levonorgestrel/ ethinyl estradiol

multicheck MultiCheck Results - 3 Interactions

Smiley face Smiley face

Avoid/Use Alternative

Smiley face Smiley face Phrenilin Forte (butalbital/ acetaminophen) + Quasense (levonorgestrel/ ethinyl estradiol)

Avoid/Use Alternative


butalbital + ethinyl estradiol (contraceptive)

use additional non-hormonal or alternative contraception during and x28 days after butalbital tx: combo may decr. ethinyl estradiol levels, contraceptive efficacy (hepatic metabolism induced, UGT induced)

butalbital + levonorgestrel (contraceptive)

use additional non-hormonal or alternative contraception during and x28 days after butalbital tx: combo may decr. levonorgestrel levels, contraceptive efficacy (hepatic metabolism induced)

Monitor/Modify Tx


acetaminophen + ethinyl estradiol (contraceptive)

monitor thrombosis s/sx: combo may incr. ethinyl estradiol levels, risk of thromboembolism, other adverse effects (mechanism unknown)

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