Allergies Home > Sudafed Warnings and Precautions
There are numerous warnings and precautions with Sudafed to be aware of before starting treatment, including information on who should not use this drug. For example, you should not take Sudafed if you have taken an MAOI recently, have narrow angle glaucoma, or have difficulty passing urine. It is also important to know that Sudafed can cause problems in people with glaucoma, diabetes, hyperthyroidism, or kidney disease.
- High blood pressure (hypertension)
- Heart disease
- Difficult passing urine
- An overactive thyroid (hyperthyroidism)
- An enlarged prostate (also known as benign prostatic hyperplasia, or BPH)
- Kidney disease, such as kidney failure (renal failure)
- Any allergies, including allergies to food, dyes, or preservatives.
- Pregnant or thinking of becoming pregnant