In adults, the condition refers to any penis smaller than 2.8 inches in length. (2) In infants, a Micropenis is classed as any penis that is less than 0.75 inches in length. This is considered significantly smaller than a ânormalâ male newbornâs penis, which is between 1.1 and 1.6 inches in length when stretched gently.
drug-drug interaction, a modification of the effect of a drug when administered with another drug. The effect may be an increase or a decrease in the action of either substance, or it may be an adverse effect that is not normally associated with either drug.he effect may be an increase or a decrease in the action of either substance, or it may be an adverse effect that is not normally associated with either drug.
Substance dependence also known as drug dependence is an adaptive state that develops from repeated drug administration, and which results in withdrawal upon cessation of drug use. A drug addiction, a distinct concept from substance dependence, is defined as compulsive, out-of-control drug use, despite negative consequences. An addictive drug is a drug which is both rewarding and reinforcing.