1.   A nurse who checks prescriptions against a database for potentially dangerous interactions.

2.   Counterfeits and adulterated drugs can trigger allergic reactions or cause dangerous interactions with other drugs.

3.   Dangerous interactions are a concern.

4.   In some cases, even moderate consumption can cause or aggravate ailments associated with aging or cause dangerous interactions with medicines older people take.

5.   Known side effects, including dangerous interactions between drugs, are another.

6.   Phony and adulterated versions can trigger allergic reactions or cause dangerous interactions with other drugs, health officials said, harming unsuspecting patients.

7.   Phony and adulterated versions of drugs can trigger allergic reactions or cause dangerous interactions with other drugs, health officials said, harming unsuspecting patients.

8.   The dangerous interaction between Viagra and nitroglycerine is not newly recognized, but emergency personnel have not generally been aware of the problem.

9.   These two prescription drugs have recently replaced the original non-sedating antihistamines such as Seldane, which proved to have dangerous interactions with some other drugs.

10.   They list approved uses for the drugs, dosages and possible side effects, including dangerous interactions with other medications.